1 /*
   2  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/altHashing.hpp"
  27 #include "classfile/javaClasses.inline.hpp"
  28 #include "classfile/stringTable.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/debugInfo.hpp"
  31 #include "code/pcDesc.hpp"
  32 #include "compiler/compilerOracle.hpp"
  33 #include "interpreter/interpreter.hpp"
  34 #include "memory/oopFactory.hpp"
  35 #include "memory/resourceArea.hpp"
  36 #include "memory/universe.inline.hpp"
  37 #include "oops/fieldStreams.hpp"
  38 #include "oops/instanceKlass.hpp"
  39 #include "oops/instanceMirrorKlass.hpp"
  40 #include "oops/klass.hpp"
  41 #include "oops/method.hpp"
  42 #include "oops/objArrayOop.inline.hpp"
  43 #include "oops/oop.inline.hpp"
  44 #include "oops/symbol.hpp"
  45 #include "oops/typeArrayOop.hpp"
  46 #include "prims/jvmtiRedefineClassesTrace.hpp"
  47 #include "runtime/fieldDescriptor.hpp"
  48 #include "runtime/handles.inline.hpp"
  49 #include "runtime/interfaceSupport.hpp"
  50 #include "runtime/java.hpp"
  51 #include "runtime/javaCalls.hpp"
  52 #include "runtime/safepoint.hpp"
  53 #include "runtime/thread.inline.hpp"
  54 #include "runtime/vframe.hpp"
  55 #include "utilities/preserveException.hpp"
  56 
  57 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  58 
  59 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  60   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  61 
  62 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  63   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  64 
  65 InjectedField JavaClasses::_injected_fields[] = {
  66   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  67 };
  68 
  69 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  70   return _injected_fields[id].compute_offset();
  71 }
  72 
  73 
  74 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  75   *field_count = 0;
  76 
  77   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  78   if (sid == vmSymbols::NO_SID) {
  79     // Only well known classes can inject fields
  80     return NULL;
  81   }
  82 
  83   int count = 0;
  84   int start = -1;
  85 
  86 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
  87   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
  88     count++;                                                       \
  89     if (start == -1) start = klass##_##name##_enum;                \
  90   }
  91   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
  92 #undef LOOKUP_INJECTED_FIELD
  93 
  94   if (start != -1) {
  95     *field_count = count;
  96     return _injected_fields + start;
  97   }
  98   return NULL;
  99 }
 100 
 101 
 102 static bool find_field(InstanceKlass* ik,
 103                        Symbol* name_symbol, Symbol* signature_symbol,
 104                        fieldDescriptor* fd,
 105                        bool allow_super = false) {
 106   if (allow_super)
 107     return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
 108   else
 109     return ik->find_local_field(name_symbol, signature_symbol, fd);
 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 allow_super = false) {
 117   fieldDescriptor fd;
 118   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 119   if (!find_field(ik, name_symbol, signature_symbol, &fd, 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     fatal("Invalid layout of preloaded 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 
 812 Klass* java_lang_Class::array_klass(oop java_class) {
 813   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 814   assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
 815   return k;
 816 }
 817 
 818 
 819 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
 820   assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
 821   java_class->metadata_field_put(_array_klass_offset, klass);
 822 }
 823 
 824 
 825 bool java_lang_Class::is_primitive(oop java_class) {
 826   // should assert:
 827   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 828   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
 829 
 830 #ifdef ASSERT
 831   if (is_primitive) {
 832     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 833     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
 834         "Should be either the T_VOID primitive or a java primitive");
 835   }
 836 #endif
 837 
 838   return is_primitive;
 839 }
 840 
 841 
 842 BasicType java_lang_Class::primitive_type(oop java_class) {
 843   assert(java_lang_Class::is_primitive(java_class), "just checking");
 844   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
 845   BasicType type = T_VOID;
 846   if (ak != NULL) {
 847     // Note: create_basic_type_mirror above initializes ak to a non-null value.
 848     type = ArrayKlass::cast(ak)->element_type();
 849   } else {
 850     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
 851   }
 852   assert(Universe::java_mirror(type) == java_class, "must be consistent");
 853   return type;
 854 }
 855 
 856 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
 857   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 858   if (is_primitive(java_class)) {
 859     if (reference_klass != NULL)
 860       (*reference_klass) = NULL;
 861     return primitive_type(java_class);
 862   } else {
 863     if (reference_klass != NULL)
 864       (*reference_klass) = as_Klass(java_class);
 865     return T_OBJECT;
 866   }
 867 }
 868 
 869 
 870 oop java_lang_Class::primitive_mirror(BasicType t) {
 871   oop mirror = Universe::java_mirror(t);
 872   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
 873   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
 874   return mirror;
 875 }
 876 
 877 bool java_lang_Class::offsets_computed = false;
 878 int  java_lang_Class::classRedefinedCount_offset = -1;
 879 
 880 void java_lang_Class::compute_offsets() {
 881   assert(!offsets_computed, "offsets should be initialized only once");
 882   offsets_computed = true;
 883 
 884   Klass* k = SystemDictionary::Class_klass();
 885   // The classRedefinedCount field is only present starting in 1.5,
 886   // so don't go fatal.
 887   compute_optional_offset(classRedefinedCount_offset,
 888                           k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
 889 
 890   // Needs to be optional because the old build runs Queens during bootstrapping
 891   // and jdk8-9 doesn't have coordinated pushes yet.
 892   compute_optional_offset(_class_loader_offset,
 893                  k, vmSymbols::classLoader_name(),
 894                  vmSymbols::classloader_signature());
 895 
 896   compute_offset(_component_mirror_offset,
 897                  k, vmSymbols::componentType_name(),
 898                  vmSymbols::class_signature());
 899 
 900   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
 901   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
 902   // GC treats them the same.
 903   _init_lock_offset = _component_mirror_offset;
 904 
 905   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 906 }
 907 
 908 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
 909   if (classRedefinedCount_offset == -1) {
 910     // If we don't have an offset for it then just return -1 as a marker.
 911     return -1;
 912   }
 913 
 914   return the_class_mirror->int_field(classRedefinedCount_offset);
 915 }
 916 
 917 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
 918   if (classRedefinedCount_offset == -1) {
 919     // If we don't have an offset for it then nothing to set.
 920     return;
 921   }
 922 
 923   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
 924 }
 925 
 926 
 927 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
 928 //       platform thread structure, and a eetop offset which was used for thread
 929 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
 930 //       merged, so in the HotSpot VM we just use the eetop field for the thread
 931 //       instead of the privateInfo_offset.
 932 //
 933 // Note: The stackSize field is only present starting in 1.4.
 934 
 935 int java_lang_Thread::_name_offset = 0;
 936 int java_lang_Thread::_group_offset = 0;
 937 int java_lang_Thread::_contextClassLoader_offset = 0;
 938 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
 939 int java_lang_Thread::_priority_offset = 0;
 940 int java_lang_Thread::_eetop_offset = 0;
 941 int java_lang_Thread::_daemon_offset = 0;
 942 int java_lang_Thread::_stillborn_offset = 0;
 943 int java_lang_Thread::_stackSize_offset = 0;
 944 int java_lang_Thread::_tid_offset = 0;
 945 int java_lang_Thread::_thread_status_offset = 0;
 946 int java_lang_Thread::_park_blocker_offset = 0;
 947 int java_lang_Thread::_park_event_offset = 0 ;
 948 
 949 
 950 void java_lang_Thread::compute_offsets() {
 951   assert(_group_offset == 0, "offsets should be initialized only once");
 952 
 953   Klass* k = SystemDictionary::Thread_klass();
 954   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
 955   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
 956   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
 957   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
 958   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
 959   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
 960   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
 961   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
 962   // The stackSize field is only present starting in 1.4, so don't go fatal.
 963   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
 964   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
 965   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
 966   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
 967   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
 968   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
 969   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
 970  vmSymbols::long_signature());
 971 }
 972 
 973 
 974 JavaThread* java_lang_Thread::thread(oop java_thread) {
 975   return (JavaThread*)java_thread->address_field(_eetop_offset);
 976 }
 977 
 978 
 979 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
 980   java_thread->address_field_put(_eetop_offset, (address)thread);
 981 }
 982 
 983 
 984 oop java_lang_Thread::name(oop java_thread) {
 985   return java_thread->obj_field(_name_offset);
 986 }
 987 
 988 
 989 void java_lang_Thread::set_name(oop java_thread, oop name) {
 990   java_thread->obj_field_put(_name_offset, name);
 991 }
 992 
 993 
 994 ThreadPriority java_lang_Thread::priority(oop java_thread) {
 995   return (ThreadPriority)java_thread->int_field(_priority_offset);
 996 }
 997 
 998 
 999 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1000   java_thread->int_field_put(_priority_offset, priority);
1001 }
1002 
1003 
1004 oop java_lang_Thread::threadGroup(oop java_thread) {
1005   return java_thread->obj_field(_group_offset);
1006 }
1007 
1008 
1009 bool java_lang_Thread::is_stillborn(oop java_thread) {
1010   return java_thread->bool_field(_stillborn_offset) != 0;
1011 }
1012 
1013 
1014 // We never have reason to turn the stillborn bit off
1015 void java_lang_Thread::set_stillborn(oop java_thread) {
1016   java_thread->bool_field_put(_stillborn_offset, true);
1017 }
1018 
1019 
1020 bool java_lang_Thread::is_alive(oop java_thread) {
1021   JavaThread* thr = java_lang_Thread::thread(java_thread);
1022   return (thr != NULL);
1023 }
1024 
1025 
1026 bool java_lang_Thread::is_daemon(oop java_thread) {
1027   return java_thread->bool_field(_daemon_offset) != 0;
1028 }
1029 
1030 
1031 void java_lang_Thread::set_daemon(oop java_thread) {
1032   java_thread->bool_field_put(_daemon_offset, true);
1033 }
1034 
1035 oop java_lang_Thread::context_class_loader(oop java_thread) {
1036   return java_thread->obj_field(_contextClassLoader_offset);
1037 }
1038 
1039 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1040   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1041 }
1042 
1043 
1044 jlong java_lang_Thread::stackSize(oop java_thread) {
1045   if (_stackSize_offset > 0) {
1046     return java_thread->long_field(_stackSize_offset);
1047   } else {
1048     return 0;
1049   }
1050 }
1051 
1052 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1053 void java_lang_Thread::set_thread_status(oop java_thread,
1054                                          java_lang_Thread::ThreadStatus status) {
1055   // The threadStatus is only present starting in 1.5
1056   if (_thread_status_offset > 0) {
1057     java_thread->int_field_put(_thread_status_offset, status);
1058   }
1059 }
1060 
1061 // Read thread status value from threadStatus field in java.lang.Thread java class.
1062 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1063   assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1064          JavaThread::current()->thread_state() == _thread_in_vm,
1065          "Java Thread is not running in vm");
1066   // The threadStatus is only present starting in 1.5
1067   if (_thread_status_offset > 0) {
1068     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1069   } else {
1070     // All we can easily figure out is if it is alive, but that is
1071     // enough info for a valid unknown status.
1072     // These aren't restricted to valid set ThreadStatus values, so
1073     // use JVMTI values and cast.
1074     JavaThread* thr = java_lang_Thread::thread(java_thread);
1075     if (thr == NULL) {
1076       // the thread hasn't run yet or is in the process of exiting
1077       return NEW;
1078     }
1079     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1080   }
1081 }
1082 
1083 
1084 jlong java_lang_Thread::thread_id(oop java_thread) {
1085   // The thread ID field is only present starting in 1.5
1086   if (_tid_offset > 0) {
1087     return java_thread->long_field(_tid_offset);
1088   } else {
1089     return 0;
1090   }
1091 }
1092 
1093 oop java_lang_Thread::park_blocker(oop java_thread) {
1094   assert(JDK_Version::current().supports_thread_park_blocker() &&
1095          _park_blocker_offset != 0, "Must support parkBlocker field");
1096 
1097   if (_park_blocker_offset > 0) {
1098     return java_thread->obj_field(_park_blocker_offset);
1099   }
1100 
1101   return NULL;
1102 }
1103 
1104 jlong java_lang_Thread::park_event(oop java_thread) {
1105   if (_park_event_offset > 0) {
1106     return java_thread->long_field(_park_event_offset);
1107   }
1108   return 0;
1109 }
1110 
1111 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1112   if (_park_event_offset > 0) {
1113     java_thread->long_field_put(_park_event_offset, ptr);
1114     return true;
1115   }
1116   return false;
1117 }
1118 
1119 
1120 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1121   assert(_thread_status_offset != 0, "Must have thread status");
1122   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1123   switch (status) {
1124     case NEW                      : return "NEW";
1125     case RUNNABLE                 : return "RUNNABLE";
1126     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1127     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1128     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1129     case PARKED                   : return "WAITING (parking)";
1130     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1131     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1132     case TERMINATED               : return "TERMINATED";
1133     default                       : return "UNKNOWN";
1134   };
1135 }
1136 int java_lang_ThreadGroup::_parent_offset = 0;
1137 int java_lang_ThreadGroup::_name_offset = 0;
1138 int java_lang_ThreadGroup::_threads_offset = 0;
1139 int java_lang_ThreadGroup::_groups_offset = 0;
1140 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1141 int java_lang_ThreadGroup::_destroyed_offset = 0;
1142 int java_lang_ThreadGroup::_daemon_offset = 0;
1143 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1144 int java_lang_ThreadGroup::_nthreads_offset = 0;
1145 int java_lang_ThreadGroup::_ngroups_offset = 0;
1146 
1147 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1148   assert(java_thread_group->is_oop(), "thread group must be oop");
1149   return java_thread_group->obj_field(_parent_offset);
1150 }
1151 
1152 // ("name as oop" accessor is not necessary)
1153 
1154 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1155   oop name = java_thread_group->obj_field(_name_offset);
1156   // ThreadGroup.name can be null
1157   return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1158 }
1159 
1160 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1161   assert(java_thread_group->is_oop(), "thread group must be oop");
1162   return java_thread_group->int_field(_nthreads_offset);
1163 }
1164 
1165 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1166   oop threads = java_thread_group->obj_field(_threads_offset);
1167   assert(threads != NULL, "threadgroups should have threads");
1168   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1169   return objArrayOop(threads);
1170 }
1171 
1172 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1173   assert(java_thread_group->is_oop(), "thread group must be oop");
1174   return java_thread_group->int_field(_ngroups_offset);
1175 }
1176 
1177 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1178   oop groups = java_thread_group->obj_field(_groups_offset);
1179   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1180   return objArrayOop(groups);
1181 }
1182 
1183 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1184   assert(java_thread_group->is_oop(), "thread group must be oop");
1185   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1186 }
1187 
1188 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1189   assert(java_thread_group->is_oop(), "thread group must be oop");
1190   return java_thread_group->bool_field(_destroyed_offset) != 0;
1191 }
1192 
1193 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1194   assert(java_thread_group->is_oop(), "thread group must be oop");
1195   return java_thread_group->bool_field(_daemon_offset) != 0;
1196 }
1197 
1198 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1199   assert(java_thread_group->is_oop(), "thread group must be oop");
1200   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1201 }
1202 
1203 void java_lang_ThreadGroup::compute_offsets() {
1204   assert(_parent_offset == 0, "offsets should be initialized only once");
1205 
1206   Klass* k = SystemDictionary::ThreadGroup_klass();
1207 
1208   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1209   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1210   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1211   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1212   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1213   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1214   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1215   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1216   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1217   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1218 }
1219 
1220 oop java_lang_Throwable::unassigned_stacktrace() {
1221   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1222   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1223   if (UseCompressedOops) {
1224     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1225   } else {
1226     return oopDesc::load_decode_heap_oop((oop*)addr);
1227   }
1228 }
1229 
1230 oop java_lang_Throwable::backtrace(oop throwable) {
1231   return throwable->obj_field_acquire(backtrace_offset);
1232 }
1233 
1234 
1235 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1236   throwable->release_obj_field_put(backtrace_offset, value);
1237 }
1238 
1239 
1240 oop java_lang_Throwable::message(oop throwable) {
1241   return throwable->obj_field(detailMessage_offset);
1242 }
1243 
1244 
1245 oop java_lang_Throwable::message(Handle throwable) {
1246   return throwable->obj_field(detailMessage_offset);
1247 }
1248 
1249 
1250 // Return Symbol for detailed_message or NULL
1251 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1252   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1253   oop detailed_message = java_lang_Throwable::message(throwable);
1254   if (detailed_message != NULL) {
1255     return java_lang_String::as_symbol(detailed_message, THREAD);
1256   }
1257   return NULL;
1258 }
1259 
1260 void java_lang_Throwable::set_message(oop throwable, oop value) {
1261   throwable->obj_field_put(detailMessage_offset, value);
1262 }
1263 
1264 
1265 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1266   throwable->obj_field_put(stackTrace_offset, st_element_array);
1267 }
1268 
1269 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1270   set_stacktrace(throwable, NULL);
1271 }
1272 
1273 
1274 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1275   ResourceMark rm;
1276   Klass* k = throwable->klass();
1277   assert(k != NULL, "just checking");
1278   st->print("%s", InstanceKlass::cast(k)->external_name());
1279   oop msg = message(throwable);
1280   if (msg != NULL) {
1281     st->print(": %s", java_lang_String::as_utf8_string(msg));
1282   }
1283 }
1284 
1285 
1286 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1287   ResourceMark rm;
1288   Klass* k = throwable->klass();
1289   assert(k != NULL, "just checking");
1290   st->print("%s", InstanceKlass::cast(k)->external_name());
1291   oop msg = message(throwable);
1292   if (msg != NULL) {
1293     st->print(": %s", java_lang_String::as_utf8_string(msg));
1294   }
1295 }
1296 
1297 // After this many redefines, the stack trace is unreliable.
1298 const int MAX_VERSION = USHRT_MAX;
1299 
1300 // Helper backtrace functions to store bci|version together.
1301 static inline int merge_bci_and_version(int bci, int version) {
1302   // only store u2 for version, checking for overflow.
1303   if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1304   assert((jushort)bci == bci, "bci should be short");
1305   return build_int_from_shorts(version, bci);
1306 }
1307 
1308 static inline int bci_at(unsigned int merged) {
1309   return extract_high_short_from_int(merged);
1310 }
1311 static inline int version_at(unsigned int merged) {
1312   return extract_low_short_from_int(merged);
1313 }
1314 
1315 static inline bool version_matches(Method* method, int version) {
1316   return (method->constants()->version() == version && version < MAX_VERSION);
1317 }
1318 
1319 static inline int get_line_number(Method* method, int bci) {
1320   int line_number = 0;
1321   if (method->is_native()) {
1322     // Negative value different from -1 below, enabling Java code in
1323     // class java.lang.StackTraceElement to distinguish "native" from
1324     // "no LineNumberTable".  JDK tests for -2.
1325     line_number = -2;
1326   } else {
1327     // Returns -1 if no LineNumberTable, and otherwise actual line number
1328     line_number = method->line_number_from_bci(bci);
1329     if (line_number == -1 && ShowHiddenFrames) {
1330       line_number = bci + 1000000;
1331     }
1332   }
1333   return line_number;
1334 }
1335 
1336 // This class provides a simple wrapper over the internal structure of
1337 // exception backtrace to insulate users of the backtrace from needing
1338 // to know what it looks like.
1339 class BacktraceBuilder: public StackObj {
1340  private:
1341   Handle          _backtrace;
1342   objArrayOop     _head;
1343   typeArrayOop    _methods;
1344   typeArrayOop    _bcis;
1345   objArrayOop     _mirrors;
1346   int             _index;
1347   No_Safepoint_Verifier _nsv;
1348 
1349  public:
1350 
1351   enum {
1352     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1353     trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1354     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1355     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1356     trace_size           = java_lang_Throwable::trace_size,
1357     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1358   };
1359 
1360   // get info out of chunks
1361   static typeArrayOop get_methods(objArrayHandle chunk) {
1362     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1363     assert(methods != NULL, "method array should be initialized in backtrace");
1364     return methods;
1365   }
1366   static typeArrayOop get_bcis(objArrayHandle chunk) {
1367     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1368     assert(bcis != NULL, "bci array should be initialized in backtrace");
1369     return bcis;
1370   }
1371   static objArrayOop get_mirrors(objArrayHandle chunk) {
1372     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1373     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1374     return mirrors;
1375   }
1376 
1377   // constructor for new backtrace
1378   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1379     expand(CHECK);
1380     _backtrace = _head;
1381     _index = 0;
1382   }
1383 
1384   BacktraceBuilder(objArrayHandle backtrace) {
1385     _methods = get_methods(backtrace);
1386     _bcis = get_bcis(backtrace);
1387     _mirrors = get_mirrors(backtrace);
1388     assert(_methods->length() == _bcis->length() &&
1389            _methods->length() == _mirrors->length(),
1390            "method and source information arrays should match");
1391 
1392     // head is the preallocated backtrace
1393     _backtrace = _head = backtrace();
1394     _index = 0;
1395   }
1396 
1397   void expand(TRAPS) {
1398     objArrayHandle old_head(THREAD, _head);
1399     Pause_No_Safepoint_Verifier pnsv(&_nsv);
1400 
1401     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1402     objArrayHandle new_head(THREAD, head);
1403 
1404     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1405     typeArrayHandle new_methods(THREAD, methods);
1406 
1407     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1408     typeArrayHandle new_bcis(THREAD, bcis);
1409 
1410     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1411     objArrayHandle new_mirrors(THREAD, mirrors);
1412 
1413     if (!old_head.is_null()) {
1414       old_head->obj_at_put(trace_next_offset, new_head());
1415     }
1416     new_head->obj_at_put(trace_methods_offset, new_methods());
1417     new_head->obj_at_put(trace_bcis_offset, new_bcis());
1418     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1419 
1420     _head    = new_head();
1421     _methods = new_methods();
1422     _bcis = new_bcis();
1423     _mirrors = new_mirrors();
1424     _index = 0;
1425   }
1426 
1427   oop backtrace() {
1428     return _backtrace();
1429   }
1430 
1431   inline void push(Method* method, int bci, TRAPS) {
1432     // Smear the -1 bci to 0 since the array only holds unsigned
1433     // shorts.  The later line number lookup would just smear the -1
1434     // to a 0 even if it could be recorded.
1435     if (bci == SynchronizationEntryBCI) bci = 0;
1436 
1437     if (_index >= trace_chunk_size) {
1438       methodHandle mhandle(THREAD, method);
1439       expand(CHECK);
1440       method = mhandle();
1441     }
1442 
1443     _methods->short_at_put(_index, method->method_idnum());
1444     _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1445 
1446     // We need to save the mirrors in the backtrace to keep the class
1447     // from being unloaded while we still have this stack trace.
1448     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1449     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1450     _index++;
1451   }
1452 
1453 };
1454 
1455 // Print stack trace element to resource allocated buffer
1456 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1457                                   int method_id, int version, int bci) {
1458 
1459   // Get strings and string lengths
1460   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1461   const char* klass_name  = holder->external_name();
1462   int buf_len = (int)strlen(klass_name);
1463 
1464   // The method id may point to an obsolete method, can't get more stack information
1465   Method* method = holder->method_with_idnum(method_id);
1466   if (method == NULL) {
1467     char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1468     // This is what the java code prints in this case - added Redefined
1469     sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1470     return buf;
1471   }
1472 
1473   char* method_name = method->name()->as_C_string();
1474   buf_len += (int)strlen(method_name);
1475 
1476   char* source_file_name = NULL;
1477   if (version_matches(method, version)) {
1478     Symbol* source = holder->source_file_name();
1479     if (source != NULL) {
1480       source_file_name = source->as_C_string();
1481       buf_len += (int)strlen(source_file_name);
1482     }
1483   }
1484 
1485   // Allocate temporary buffer with extra space for formatting and line number
1486   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1487 
1488   // Print stack trace line in buffer
1489   sprintf(buf, "\tat %s.%s", klass_name, method_name);
1490 
1491   if (!version_matches(method, version)) {
1492     strcat(buf, "(Redefined)");
1493   } else {
1494     int line_number = get_line_number(method, bci);
1495     if (line_number == -2) {
1496       strcat(buf, "(Native Method)");
1497     } else {
1498       if (source_file_name != NULL && (line_number != -1)) {
1499         // Sourcename and linenumber
1500         sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1501       } else if (source_file_name != NULL) {
1502         // Just sourcename
1503         sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1504       } else {
1505         // Neither sourcename nor linenumber
1506         sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1507       }
1508       nmethod* nm = method->code();
1509       if (WizardMode && nm != NULL) {
1510         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1511       }
1512     }
1513   }
1514 
1515   return buf;
1516 }
1517 
1518 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1519                                               int method_id, int version, int bci) {
1520   ResourceMark rm;
1521   char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1522   st->print_cr("%s", buf);
1523 }
1524 
1525 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1526   Handle mirror = method->method_holder()->java_mirror();
1527   int method_id = method->method_idnum();
1528   int version = method->constants()->version();
1529   print_stack_element(st, mirror, method_id, version, bci);
1530 }
1531 
1532 const char* java_lang_Throwable::no_stack_trace_message() {
1533   return "\t<<no stack trace available>>";
1534 }
1535 
1536 
1537 // Currently used only for exceptions occurring during startup
1538 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1539   Thread *THREAD = Thread::current();
1540   Handle h_throwable(THREAD, throwable);
1541   while (h_throwable.not_null()) {
1542     objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1543     if (result.is_null()) {
1544       st->print_cr("%s", no_stack_trace_message());
1545       return;
1546     }
1547 
1548     while (result.not_null()) {
1549 
1550       // Get method id, bci, version and mirror from chunk
1551       typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1552       typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1553       objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1554 
1555       int length = methods()->length();
1556       for (int index = 0; index < length; index++) {
1557         Handle mirror(THREAD, mirrors->obj_at(index));
1558         // NULL mirror means end of stack trace
1559         if (mirror.is_null()) goto handle_cause;
1560         int method = methods->short_at(index);
1561         int version = version_at(bcis->int_at(index));
1562         int bci = bci_at(bcis->int_at(index));
1563         print_stack_element(st, mirror, method, version, bci);
1564       }
1565       result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1566     }
1567   handle_cause:
1568     {
1569       EXCEPTION_MARK;
1570       JavaValue cause(T_OBJECT);
1571       JavaCalls::call_virtual(&cause,
1572                               h_throwable,
1573                               KlassHandle(THREAD, h_throwable->klass()),
1574                               vmSymbols::getCause_name(),
1575                               vmSymbols::void_throwable_signature(),
1576                               THREAD);
1577       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1578       if (HAS_PENDING_EXCEPTION) {
1579         CLEAR_PENDING_EXCEPTION;
1580         h_throwable = Handle();
1581       } else {
1582         h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1583         if (h_throwable.not_null()) {
1584           st->print("Caused by: ");
1585           print(h_throwable, st);
1586           st->cr();
1587         }
1588       }
1589     }
1590   }
1591 }
1592 
1593 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1594   if (!StackTraceInThrowable) return;
1595   ResourceMark rm(THREAD);
1596 
1597   // Start out by clearing the backtrace for this object, in case the VM
1598   // runs out of memory while allocating the stack trace
1599   set_backtrace(throwable(), NULL);
1600   // Clear lazily constructed Java level stacktrace if refilling occurs
1601   // This is unnecessary in 1.7+ but harmless
1602   clear_stacktrace(throwable());
1603 
1604   int max_depth = MaxJavaStackTraceDepth;
1605   JavaThread* thread = (JavaThread*)THREAD;
1606   BacktraceBuilder bt(CHECK);
1607 
1608   // If there is no Java frame just return the method that was being called
1609   // with bci 0
1610   if (!thread->has_last_Java_frame()) {
1611     if (max_depth >= 1 && method() != NULL) {
1612       bt.push(method(), 0, CHECK);
1613       set_backtrace(throwable(), bt.backtrace());
1614     }
1615     return;
1616   }
1617 
1618   // Instead of using vframe directly, this version of fill_in_stack_trace
1619   // basically handles everything by hand. This significantly improved the
1620   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1621   // See bug 6333838 for  more details.
1622   // The "ASSERT" here is to verify this method generates the exactly same stack
1623   // trace as utilizing vframe.
1624 #ifdef ASSERT
1625   vframeStream st(thread);
1626   methodHandle st_method(THREAD, st.method());
1627 #endif
1628   int total_count = 0;
1629   RegisterMap map(thread, false);
1630   int decode_offset = 0;
1631   nmethod* nm = NULL;
1632   bool skip_fillInStackTrace_check = false;
1633   bool skip_throwableInit_check = false;
1634   bool skip_hidden = !ShowHiddenFrames;
1635 
1636   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1637     Method* method = NULL;
1638     int bci = 0;
1639 
1640     // Compiled java method case.
1641     if (decode_offset != 0) {
1642       DebugInfoReadStream stream(nm, decode_offset);
1643       decode_offset = stream.read_int();
1644       method = (Method*)nm->metadata_at(stream.read_int());
1645       bci = stream.read_bci();
1646     } else {
1647       if (fr.is_first_frame()) break;
1648       address pc = fr.pc();
1649       if (fr.is_interpreted_frame()) {
1650         address bcp = fr.interpreter_frame_bcp();
1651         method = fr.interpreter_frame_method();
1652         bci =  method->bci_from(bcp);
1653         fr = fr.sender(&map);
1654       } else {
1655         CodeBlob* cb = fr.cb();
1656         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1657         // but non nmethod
1658         fr = fr.sender(&map);
1659         if (cb == NULL || !cb->is_nmethod()) {
1660           continue;
1661         }
1662         nm = (nmethod*)cb;
1663         if (nm->method()->is_native()) {
1664           method = nm->method();
1665           bci = 0;
1666         } else {
1667           PcDesc* pd = nm->pc_desc_at(pc);
1668           decode_offset = pd->scope_decode_offset();
1669           // if decode_offset is not equal to 0, it will execute the
1670           // "compiled java method case" at the beginning of the loop.
1671           continue;
1672         }
1673       }
1674     }
1675 #ifdef ASSERT
1676     assert(st_method() == method && st.bci() == bci,
1677            "Wrong stack trace");
1678     st.next();
1679     // vframeStream::method isn't GC-safe so store off a copy
1680     // of the Method* in case we GC.
1681     if (!st.at_end()) {
1682       st_method = st.method();
1683     }
1684 #endif
1685 
1686     // the format of the stacktrace will be:
1687     // - 1 or more fillInStackTrace frames for the exception class (skipped)
1688     // - 0 or more <init> methods for the exception class (skipped)
1689     // - rest of the stack
1690 
1691     if (!skip_fillInStackTrace_check) {
1692       if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1693            method->name() == vmSymbols::fillInStackTrace0_name()) &&
1694           throwable->is_a(method->method_holder())) {
1695         continue;
1696       }
1697       else {
1698         skip_fillInStackTrace_check = true; // gone past them all
1699       }
1700     }
1701     if (!skip_throwableInit_check) {
1702       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1703 
1704       // skip <init> methods of the exception class and superclasses
1705       // This is simlar to classic VM.
1706       if (method->name() == vmSymbols::object_initializer_name() &&
1707           throwable->is_a(method->method_holder())) {
1708         continue;
1709       } else {
1710         // there are none or we've seen them all - either way stop checking
1711         skip_throwableInit_check = true;
1712       }
1713     }
1714     if (method->is_hidden()) {
1715       if (skip_hidden)  continue;
1716     }
1717     bt.push(method, bci, CHECK);
1718     total_count++;
1719   }
1720 
1721   // Put completed stack trace into throwable object
1722   set_backtrace(throwable(), bt.backtrace());
1723 }
1724 
1725 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1726   // No-op if stack trace is disabled
1727   if (!StackTraceInThrowable) {
1728     return;
1729   }
1730 
1731   // Disable stack traces for some preallocated out of memory errors
1732   if (!Universe::should_fill_in_stack_trace(throwable)) {
1733     return;
1734   }
1735 
1736   PRESERVE_EXCEPTION_MARK;
1737 
1738   JavaThread* thread = JavaThread::active();
1739   fill_in_stack_trace(throwable, method, thread);
1740   // ignore exceptions thrown during stack trace filling
1741   CLEAR_PENDING_EXCEPTION;
1742 }
1743 
1744 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1745   // Allocate stack trace - backtrace is created but not filled in
1746 
1747   // No-op if stack trace is disabled
1748   if (!StackTraceInThrowable) return;
1749   BacktraceBuilder bt(CHECK);   // creates a backtrace
1750   set_backtrace(throwable(), bt.backtrace());
1751 }
1752 
1753 
1754 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1755   // Fill in stack trace into preallocated backtrace (no GC)
1756 
1757   // No-op if stack trace is disabled
1758   if (!StackTraceInThrowable) return;
1759 
1760   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1761 
1762   JavaThread* THREAD = JavaThread::current();
1763 
1764   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1765   assert(backtrace.not_null(), "backtrace should have been preallocated");
1766 
1767   ResourceMark rm(THREAD);
1768   vframeStream st(THREAD);
1769 
1770   BacktraceBuilder bt(backtrace);
1771 
1772   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1773   // methods as preallocated errors aren't created by "java" code.
1774 
1775   // fill in as much stack trace as possible
1776   typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1777   int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1778   int chunk_count = 0;
1779 
1780   for (;!st.at_end(); st.next()) {
1781     bt.push(st.method(), st.bci(), CHECK);
1782     chunk_count++;
1783 
1784     // Bail-out for deep stacks
1785     if (chunk_count >= max_chunks) break;
1786   }
1787 
1788   // We support the Throwable immutability protocol defined for Java 7.
1789   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1790   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1791 }
1792 
1793 
1794 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1795   if (throwable == NULL) {
1796     THROW_0(vmSymbols::java_lang_NullPointerException());
1797   }
1798   objArrayOop chunk = objArrayOop(backtrace(throwable));
1799   int depth = 0;
1800   if (chunk != NULL) {
1801     // Iterate over chunks and count full ones
1802     while (true) {
1803       objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1804       if (next == NULL) break;
1805       depth += trace_chunk_size;
1806       chunk = next;
1807     }
1808     assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1809     // Count element in remaining partial chunk.  NULL value for mirror
1810     // marks the end of the stack trace elements that are saved.
1811     objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1812     assert(mirrors != NULL, "sanity check");
1813     for (int i = 0; i < mirrors->length(); i++) {
1814       if (mirrors->obj_at(i) == NULL) break;
1815       depth++;
1816     }
1817   }
1818   return depth;
1819 }
1820 
1821 
1822 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1823   if (throwable == NULL) {
1824     THROW_0(vmSymbols::java_lang_NullPointerException());
1825   }
1826   if (index < 0) {
1827     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1828   }
1829   // Compute how many chunks to skip and index into actual chunk
1830   objArrayOop chunk = objArrayOop(backtrace(throwable));
1831   int skip_chunks = index / trace_chunk_size;
1832   int chunk_index = index % trace_chunk_size;
1833   while (chunk != NULL && skip_chunks > 0) {
1834     chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1835         skip_chunks--;
1836   }
1837   if (chunk == NULL) {
1838     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1839   }
1840   // Get method id, bci, version and mirror from chunk
1841   typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1842   typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1843   objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1844 
1845   assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1846 
1847   int method = methods->short_at(chunk_index);
1848   int version = version_at(bcis->int_at(chunk_index));
1849   int bci = bci_at(bcis->int_at(chunk_index));
1850   Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1851 
1852   // Chunk can be partial full
1853   if (mirror.is_null()) {
1854     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1855   }
1856 
1857   oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1858   return element;
1859 }
1860 
1861 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1862                                         int version, int bci, TRAPS) {
1863   // Allocate java.lang.StackTraceElement instance
1864   Klass* k = SystemDictionary::StackTraceElement_klass();
1865   assert(k != NULL, "must be loaded in 1.4+");
1866   instanceKlassHandle ik (THREAD, k);
1867   if (ik->should_be_initialized()) {
1868     ik->initialize(CHECK_0);
1869   }
1870 
1871   Handle element = ik->allocate_instance_handle(CHECK_0);
1872   // Fill in class name
1873   ResourceMark rm(THREAD);
1874   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1875   const char* str = holder->external_name();
1876   oop classname = StringTable::intern((char*) str, CHECK_0);
1877   java_lang_StackTraceElement::set_declaringClass(element(), classname);
1878 
1879   Method* method = holder->method_with_idnum(method_id);
1880   // Method on stack may be obsolete because it was redefined so cannot be
1881   // found by idnum.
1882   if (method == NULL) {
1883     // leave name and fileName null
1884     java_lang_StackTraceElement::set_lineNumber(element(), -1);
1885     return element();
1886   }
1887 
1888   // Fill in method name
1889   oop methodname = StringTable::intern(method->name(), CHECK_0);
1890   java_lang_StackTraceElement::set_methodName(element(), methodname);
1891 
1892   if (!version_matches(method, version)) {
1893     // The method was redefined, accurate line number information isn't available
1894     java_lang_StackTraceElement::set_fileName(element(), NULL);
1895     java_lang_StackTraceElement::set_lineNumber(element(), -1);
1896   } else {
1897     // Fill in source file name and line number.
1898     Symbol* source = holder->source_file_name();
1899     if (ShowHiddenFrames && source == NULL)
1900       source = vmSymbols::unknown_class_name();
1901     oop filename = StringTable::intern(source, CHECK_0);
1902     java_lang_StackTraceElement::set_fileName(element(), filename);
1903 
1904     int line_number = get_line_number(method, bci);
1905     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1906   }
1907   return element();
1908 }
1909 
1910 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1911   Handle mirror (THREAD, method->method_holder()->java_mirror());
1912   int method_id = method->method_idnum();
1913   return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1914 }
1915 
1916 void java_lang_reflect_AccessibleObject::compute_offsets() {
1917   Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1918   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1919 }
1920 
1921 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1922   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1923   return (jboolean) reflect->bool_field(override_offset);
1924 }
1925 
1926 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1927   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1928   reflect->bool_field_put(override_offset, (int) value);
1929 }
1930 
1931 void java_lang_reflect_Method::compute_offsets() {
1932   Klass* k = SystemDictionary::reflect_Method_klass();
1933   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
1934   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
1935   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
1936   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1937   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1938   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
1939   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
1940   // The generic signature and annotations fields are only present in 1.5
1941   signature_offset = -1;
1942   annotations_offset = -1;
1943   parameter_annotations_offset = -1;
1944   annotation_default_offset = -1;
1945   type_annotations_offset = -1;
1946   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
1947   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
1948   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1949   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
1950   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
1951 }
1952 
1953 Handle java_lang_reflect_Method::create(TRAPS) {
1954   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1955   Klass* klass = SystemDictionary::reflect_Method_klass();
1956   // This class is eagerly initialized during VM initialization, since we keep a refence
1957   // to one of the methods
1958   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1959   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1960 }
1961 
1962 oop java_lang_reflect_Method::clazz(oop reflect) {
1963   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1964   return reflect->obj_field(clazz_offset);
1965 }
1966 
1967 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1968   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1969    reflect->obj_field_put(clazz_offset, value);
1970 }
1971 
1972 int java_lang_reflect_Method::slot(oop reflect) {
1973   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1974   return reflect->int_field(slot_offset);
1975 }
1976 
1977 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1978   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1979   reflect->int_field_put(slot_offset, value);
1980 }
1981 
1982 oop java_lang_reflect_Method::name(oop method) {
1983   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1984   return method->obj_field(name_offset);
1985 }
1986 
1987 void java_lang_reflect_Method::set_name(oop method, oop value) {
1988   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1989   method->obj_field_put(name_offset, value);
1990 }
1991 
1992 oop java_lang_reflect_Method::return_type(oop method) {
1993   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1994   return method->obj_field(returnType_offset);
1995 }
1996 
1997 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1998   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1999   method->obj_field_put(returnType_offset, value);
2000 }
2001 
2002 oop java_lang_reflect_Method::parameter_types(oop method) {
2003   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2004   return method->obj_field(parameterTypes_offset);
2005 }
2006 
2007 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2008   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2009   method->obj_field_put(parameterTypes_offset, value);
2010 }
2011 
2012 oop java_lang_reflect_Method::exception_types(oop method) {
2013   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2014   return method->obj_field(exceptionTypes_offset);
2015 }
2016 
2017 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2018   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2019   method->obj_field_put(exceptionTypes_offset, value);
2020 }
2021 
2022 int java_lang_reflect_Method::modifiers(oop method) {
2023   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2024   return method->int_field(modifiers_offset);
2025 }
2026 
2027 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2028   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2029   method->int_field_put(modifiers_offset, value);
2030 }
2031 
2032 bool java_lang_reflect_Method::has_signature_field() {
2033   return (signature_offset >= 0);
2034 }
2035 
2036 oop java_lang_reflect_Method::signature(oop method) {
2037   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2038   assert(has_signature_field(), "signature field must be present");
2039   return method->obj_field(signature_offset);
2040 }
2041 
2042 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2043   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2044   assert(has_signature_field(), "signature field must be present");
2045   method->obj_field_put(signature_offset, value);
2046 }
2047 
2048 bool java_lang_reflect_Method::has_annotations_field() {
2049   return (annotations_offset >= 0);
2050 }
2051 
2052 oop java_lang_reflect_Method::annotations(oop method) {
2053   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2054   assert(has_annotations_field(), "annotations field must be present");
2055   return method->obj_field(annotations_offset);
2056 }
2057 
2058 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2059   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2060   assert(has_annotations_field(), "annotations field must be present");
2061   method->obj_field_put(annotations_offset, value);
2062 }
2063 
2064 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2065   return (parameter_annotations_offset >= 0);
2066 }
2067 
2068 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2069   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2070   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2071   return method->obj_field(parameter_annotations_offset);
2072 }
2073 
2074 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2075   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2076   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2077   method->obj_field_put(parameter_annotations_offset, value);
2078 }
2079 
2080 bool java_lang_reflect_Method::has_annotation_default_field() {
2081   return (annotation_default_offset >= 0);
2082 }
2083 
2084 oop java_lang_reflect_Method::annotation_default(oop method) {
2085   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2086   assert(has_annotation_default_field(), "annotation default field must be present");
2087   return method->obj_field(annotation_default_offset);
2088 }
2089 
2090 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2091   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2092   assert(has_annotation_default_field(), "annotation default field must be present");
2093   method->obj_field_put(annotation_default_offset, value);
2094 }
2095 
2096 bool java_lang_reflect_Method::has_type_annotations_field() {
2097   return (type_annotations_offset >= 0);
2098 }
2099 
2100 oop java_lang_reflect_Method::type_annotations(oop method) {
2101   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2102   assert(has_type_annotations_field(), "type_annotations field must be present");
2103   return method->obj_field(type_annotations_offset);
2104 }
2105 
2106 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2107   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108   assert(has_type_annotations_field(), "type_annotations field must be present");
2109   method->obj_field_put(type_annotations_offset, value);
2110 }
2111 
2112 void java_lang_reflect_Constructor::compute_offsets() {
2113   Klass* k = SystemDictionary::reflect_Constructor_klass();
2114   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2115   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2116   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2117   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2118   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2119   // The generic signature and annotations fields are only present in 1.5
2120   signature_offset = -1;
2121   annotations_offset = -1;
2122   parameter_annotations_offset = -1;
2123   type_annotations_offset = -1;
2124   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2125   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2126   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2127   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2128 }
2129 
2130 Handle java_lang_reflect_Constructor::create(TRAPS) {
2131   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2132   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2133   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2134   instanceKlassHandle klass (THREAD, k);
2135   // Ensure it is initialized
2136   klass->initialize(CHECK_NH);
2137   return klass->allocate_instance_handle(THREAD);
2138 }
2139 
2140 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2141   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2142   return reflect->obj_field(clazz_offset);
2143 }
2144 
2145 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2146   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2147    reflect->obj_field_put(clazz_offset, value);
2148 }
2149 
2150 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2151   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2152   return constructor->obj_field(parameterTypes_offset);
2153 }
2154 
2155 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2156   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2157   constructor->obj_field_put(parameterTypes_offset, value);
2158 }
2159 
2160 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2161   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2162   return constructor->obj_field(exceptionTypes_offset);
2163 }
2164 
2165 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2166   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2167   constructor->obj_field_put(exceptionTypes_offset, value);
2168 }
2169 
2170 int java_lang_reflect_Constructor::slot(oop reflect) {
2171   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2172   return reflect->int_field(slot_offset);
2173 }
2174 
2175 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2176   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2177   reflect->int_field_put(slot_offset, value);
2178 }
2179 
2180 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2181   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2182   return constructor->int_field(modifiers_offset);
2183 }
2184 
2185 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2186   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2187   constructor->int_field_put(modifiers_offset, value);
2188 }
2189 
2190 bool java_lang_reflect_Constructor::has_signature_field() {
2191   return (signature_offset >= 0);
2192 }
2193 
2194 oop java_lang_reflect_Constructor::signature(oop constructor) {
2195   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2196   assert(has_signature_field(), "signature field must be present");
2197   return constructor->obj_field(signature_offset);
2198 }
2199 
2200 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2201   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2202   assert(has_signature_field(), "signature field must be present");
2203   constructor->obj_field_put(signature_offset, value);
2204 }
2205 
2206 bool java_lang_reflect_Constructor::has_annotations_field() {
2207   return (annotations_offset >= 0);
2208 }
2209 
2210 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2211   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2212   assert(has_annotations_field(), "annotations field must be present");
2213   return constructor->obj_field(annotations_offset);
2214 }
2215 
2216 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2217   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2218   assert(has_annotations_field(), "annotations field must be present");
2219   constructor->obj_field_put(annotations_offset, value);
2220 }
2221 
2222 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2223   return (parameter_annotations_offset >= 0);
2224 }
2225 
2226 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2227   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2228   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2229   return method->obj_field(parameter_annotations_offset);
2230 }
2231 
2232 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2233   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2235   method->obj_field_put(parameter_annotations_offset, value);
2236 }
2237 
2238 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2239   return (type_annotations_offset >= 0);
2240 }
2241 
2242 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2243   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244   assert(has_type_annotations_field(), "type_annotations field must be present");
2245   return constructor->obj_field(type_annotations_offset);
2246 }
2247 
2248 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2249   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2250   assert(has_type_annotations_field(), "type_annotations field must be present");
2251   constructor->obj_field_put(type_annotations_offset, value);
2252 }
2253 
2254 void java_lang_reflect_Field::compute_offsets() {
2255   Klass* k = SystemDictionary::reflect_Field_klass();
2256   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2257   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
2258   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
2259   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
2260   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2261   // The generic signature and annotations fields are only present in 1.5
2262   signature_offset = -1;
2263   annotations_offset = -1;
2264   type_annotations_offset = -1;
2265   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2266   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
2267   compute_optional_offset(type_annotations_offset,  k, vmSymbols::type_annotations_name(),  vmSymbols::byte_array_signature());
2268 }
2269 
2270 Handle java_lang_reflect_Field::create(TRAPS) {
2271   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2272   Symbol* name = vmSymbols::java_lang_reflect_Field();
2273   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2274   instanceKlassHandle klass (THREAD, k);
2275   // Ensure it is initialized
2276   klass->initialize(CHECK_NH);
2277   return klass->allocate_instance_handle(THREAD);
2278 }
2279 
2280 oop java_lang_reflect_Field::clazz(oop reflect) {
2281   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2282   return reflect->obj_field(clazz_offset);
2283 }
2284 
2285 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2286   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2287    reflect->obj_field_put(clazz_offset, value);
2288 }
2289 
2290 oop java_lang_reflect_Field::name(oop field) {
2291   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2292   return field->obj_field(name_offset);
2293 }
2294 
2295 void java_lang_reflect_Field::set_name(oop field, oop value) {
2296   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2297   field->obj_field_put(name_offset, value);
2298 }
2299 
2300 oop java_lang_reflect_Field::type(oop field) {
2301   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2302   return field->obj_field(type_offset);
2303 }
2304 
2305 void java_lang_reflect_Field::set_type(oop field, oop value) {
2306   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2307   field->obj_field_put(type_offset, value);
2308 }
2309 
2310 int java_lang_reflect_Field::slot(oop reflect) {
2311   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2312   return reflect->int_field(slot_offset);
2313 }
2314 
2315 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2316   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2317   reflect->int_field_put(slot_offset, value);
2318 }
2319 
2320 int java_lang_reflect_Field::modifiers(oop field) {
2321   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2322   return field->int_field(modifiers_offset);
2323 }
2324 
2325 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2326   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2327   field->int_field_put(modifiers_offset, value);
2328 }
2329 
2330 bool java_lang_reflect_Field::has_signature_field() {
2331   return (signature_offset >= 0);
2332 }
2333 
2334 oop java_lang_reflect_Field::signature(oop field) {
2335   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2336   assert(has_signature_field(), "signature field must be present");
2337   return field->obj_field(signature_offset);
2338 }
2339 
2340 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2341   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2342   assert(has_signature_field(), "signature field must be present");
2343   field->obj_field_put(signature_offset, value);
2344 }
2345 
2346 bool java_lang_reflect_Field::has_annotations_field() {
2347   return (annotations_offset >= 0);
2348 }
2349 
2350 oop java_lang_reflect_Field::annotations(oop field) {
2351   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2352   assert(has_annotations_field(), "annotations field must be present");
2353   return field->obj_field(annotations_offset);
2354 }
2355 
2356 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2357   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358   assert(has_annotations_field(), "annotations field must be present");
2359   field->obj_field_put(annotations_offset, value);
2360 }
2361 
2362 bool java_lang_reflect_Field::has_type_annotations_field() {
2363   return (type_annotations_offset >= 0);
2364 }
2365 
2366 oop java_lang_reflect_Field::type_annotations(oop field) {
2367   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368   assert(has_type_annotations_field(), "type_annotations field must be present");
2369   return field->obj_field(type_annotations_offset);
2370 }
2371 
2372 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2373   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374   assert(has_type_annotations_field(), "type_annotations field must be present");
2375   field->obj_field_put(type_annotations_offset, value);
2376 }
2377 
2378 void sun_reflect_ConstantPool::compute_offsets() {
2379   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2380   // This null test can be removed post beta
2381   if (k != NULL) {
2382     // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2383     compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2384   }
2385 }
2386 
2387 void java_lang_reflect_Parameter::compute_offsets() {
2388   Klass* k = SystemDictionary::reflect_Parameter_klass();
2389   if(NULL != k) {
2390     compute_offset(name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
2391     compute_offset(modifiers_offset,   k, vmSymbols::modifiers_name(),   vmSymbols::int_signature());
2392     compute_offset(index_offset,       k, vmSymbols::index_name(),       vmSymbols::int_signature());
2393     compute_offset(executable_offset,  k, vmSymbols::executable_name(),  vmSymbols::executable_signature());
2394   }
2395 }
2396 
2397 Handle java_lang_reflect_Parameter::create(TRAPS) {
2398   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2399   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2400   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2401   instanceKlassHandle klass (THREAD, k);
2402   // Ensure it is initialized
2403   klass->initialize(CHECK_NH);
2404   return klass->allocate_instance_handle(THREAD);
2405 }
2406 
2407 oop java_lang_reflect_Parameter::name(oop param) {
2408   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2409   return param->obj_field(name_offset);
2410 }
2411 
2412 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2413   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2414   param->obj_field_put(name_offset, value);
2415 }
2416 
2417 int java_lang_reflect_Parameter::modifiers(oop param) {
2418   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2419   return param->int_field(modifiers_offset);
2420 }
2421 
2422 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2423   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2424   param->int_field_put(modifiers_offset, value);
2425 }
2426 
2427 int java_lang_reflect_Parameter::index(oop param) {
2428   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2429   return param->int_field(index_offset);
2430 }
2431 
2432 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2433   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2434   param->int_field_put(index_offset, value);
2435 }
2436 
2437 oop java_lang_reflect_Parameter::executable(oop param) {
2438   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2439   return param->obj_field(executable_offset);
2440 }
2441 
2442 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2443   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2444   param->obj_field_put(executable_offset, value);
2445 }
2446 
2447 
2448 Handle sun_reflect_ConstantPool::create(TRAPS) {
2449   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2451   instanceKlassHandle klass (THREAD, k);
2452   // Ensure it is initialized
2453   klass->initialize(CHECK_NH);
2454   return klass->allocate_instance_handle(THREAD);
2455 }
2456 
2457 
2458 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2459   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460   oop mirror = value->pool_holder()->java_mirror();
2461   // Save the mirror to get back the constant pool.
2462   reflect->obj_field_put(_oop_offset, mirror);
2463 }
2464 
2465 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2466   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2467 
2468   oop mirror = reflect->obj_field(_oop_offset);
2469   Klass* k = java_lang_Class::as_Klass(mirror);
2470   assert(k->oop_is_instance(), "Must be");
2471 
2472   // Get the constant pool back from the klass.  Since class redefinition
2473   // merges the new constant pool into the old, this is essentially the
2474   // same constant pool as the original.  If constant pool merging is
2475   // no longer done in the future, this will have to change to save
2476   // the original.
2477   return InstanceKlass::cast(k)->constants();
2478 }
2479 
2480 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2481   Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2482   // This null test can be removed post beta
2483   if (k != NULL) {
2484     compute_offset(_base_offset, k,
2485                    vmSymbols::base_name(), vmSymbols::object_signature());
2486   }
2487 }
2488 
2489 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2490   Klass* k = SystemDictionary::box_klass(type);
2491   if (k == NULL)  return NULL;
2492   instanceKlassHandle h (THREAD, k);
2493   if (!h->is_initialized())  h->initialize(CHECK_0);
2494   return h->allocate_instance(THREAD);
2495 }
2496 
2497 
2498 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2499   oop box = initialize_and_allocate(type, CHECK_0);
2500   if (box == NULL)  return NULL;
2501   switch (type) {
2502     case T_BOOLEAN:
2503       box->bool_field_put(value_offset, value->z);
2504       break;
2505     case T_CHAR:
2506       box->char_field_put(value_offset, value->c);
2507       break;
2508     case T_FLOAT:
2509       box->float_field_put(value_offset, value->f);
2510       break;
2511     case T_DOUBLE:
2512       box->double_field_put(long_value_offset, value->d);
2513       break;
2514     case T_BYTE:
2515       box->byte_field_put(value_offset, value->b);
2516       break;
2517     case T_SHORT:
2518       box->short_field_put(value_offset, value->s);
2519       break;
2520     case T_INT:
2521       box->int_field_put(value_offset, value->i);
2522       break;
2523     case T_LONG:
2524       box->long_field_put(long_value_offset, value->j);
2525       break;
2526     default:
2527       return NULL;
2528   }
2529   return box;
2530 }
2531 
2532 
2533 BasicType java_lang_boxing_object::basic_type(oop box) {
2534   if (box == NULL)  return T_ILLEGAL;
2535   BasicType type = SystemDictionary::box_klass_type(box->klass());
2536   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
2537     return T_ILLEGAL;
2538   return type;
2539 }
2540 
2541 
2542 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2543   BasicType type = SystemDictionary::box_klass_type(box->klass());
2544   switch (type) {
2545   case T_BOOLEAN:
2546     value->z = box->bool_field(value_offset);
2547     break;
2548   case T_CHAR:
2549     value->c = box->char_field(value_offset);
2550     break;
2551   case T_FLOAT:
2552     value->f = box->float_field(value_offset);
2553     break;
2554   case T_DOUBLE:
2555     value->d = box->double_field(long_value_offset);
2556     break;
2557   case T_BYTE:
2558     value->b = box->byte_field(value_offset);
2559     break;
2560   case T_SHORT:
2561     value->s = box->short_field(value_offset);
2562     break;
2563   case T_INT:
2564     value->i = box->int_field(value_offset);
2565     break;
2566   case T_LONG:
2567     value->j = box->long_field(long_value_offset);
2568     break;
2569   default:
2570     return T_ILLEGAL;
2571   } // end switch
2572   return type;
2573 }
2574 
2575 
2576 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2577   BasicType type = SystemDictionary::box_klass_type(box->klass());
2578   switch (type) {
2579   case T_BOOLEAN:
2580     box->bool_field_put(value_offset, value->z);
2581     break;
2582   case T_CHAR:
2583     box->char_field_put(value_offset, value->c);
2584     break;
2585   case T_FLOAT:
2586     box->float_field_put(value_offset, value->f);
2587     break;
2588   case T_DOUBLE:
2589     box->double_field_put(long_value_offset, value->d);
2590     break;
2591   case T_BYTE:
2592     box->byte_field_put(value_offset, value->b);
2593     break;
2594   case T_SHORT:
2595     box->short_field_put(value_offset, value->s);
2596     break;
2597   case T_INT:
2598     box->int_field_put(value_offset, value->i);
2599     break;
2600   case T_LONG:
2601     box->long_field_put(long_value_offset, value->j);
2602     break;
2603   default:
2604     return T_ILLEGAL;
2605   } // end switch
2606   return type;
2607 }
2608 
2609 
2610 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2611   switch (type) {
2612   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
2613   case T_CHAR:      st->print("%d", value->c);                      break;
2614   case T_BYTE:      st->print("%d", value->b);                      break;
2615   case T_SHORT:     st->print("%d", value->s);                      break;
2616   case T_INT:       st->print("%d", value->i);                      break;
2617   case T_LONG:      st->print(INT64_FORMAT, value->j);              break;
2618   case T_FLOAT:     st->print("%f", value->f);                      break;
2619   case T_DOUBLE:    st->print("%lf", value->d);                     break;
2620   default:          st->print("type %d?", type);                    break;
2621   }
2622 }
2623 
2624 
2625 // Support for java_lang_ref_Reference
2626 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2627   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2628   address addr = ik->static_field_addr(static_lock_offset);
2629   return (HeapWord*) addr;
2630 }
2631 
2632 oop java_lang_ref_Reference::pending_list_lock() {
2633   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2634   address addr = ik->static_field_addr(static_lock_offset);
2635   if (UseCompressedOops) {
2636     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2637   } else {
2638     return oopDesc::load_decode_heap_oop((oop*)addr);
2639   }
2640 }
2641 
2642 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2643   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2644   address addr = ik->static_field_addr(static_pending_offset);
2645   // XXX This might not be HeapWord aligned, almost rather be char *.
2646   return (HeapWord*)addr;
2647 }
2648 
2649 oop java_lang_ref_Reference::pending_list() {
2650   char *addr = (char *)pending_list_addr();
2651   if (UseCompressedOops) {
2652     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2653   } else {
2654     return oopDesc::load_decode_heap_oop((oop*)addr);
2655   }
2656 }
2657 
2658 
2659 // Support for java_lang_ref_SoftReference
2660 
2661 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2662   return ref->long_field(timestamp_offset);
2663 }
2664 
2665 jlong java_lang_ref_SoftReference::clock() {
2666   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2667   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2668   return *offset;
2669 }
2670 
2671 void java_lang_ref_SoftReference::set_clock(jlong value) {
2672   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2673   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2674   *offset = value;
2675 }
2676 
2677 // Support for java_lang_invoke_DirectMethodHandle
2678 
2679 int java_lang_invoke_DirectMethodHandle::_member_offset;
2680 
2681 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2682   oop member_name = NULL;
2683   bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2684   assert(is_dmh, "a DirectMethodHandle oop is expected");
2685   if (is_dmh) {
2686     member_name = dmh->obj_field(member_offset_in_bytes());
2687   }
2688   return member_name;
2689 }
2690 
2691 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2692   Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2693   if (klass_oop != NULL) {
2694     compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2695   }
2696 }
2697 
2698 // Support for java_lang_invoke_MethodHandle
2699 
2700 int java_lang_invoke_MethodHandle::_type_offset;
2701 int java_lang_invoke_MethodHandle::_form_offset;
2702 
2703 int java_lang_invoke_MemberName::_clazz_offset;
2704 int java_lang_invoke_MemberName::_name_offset;
2705 int java_lang_invoke_MemberName::_type_offset;
2706 int java_lang_invoke_MemberName::_flags_offset;
2707 int java_lang_invoke_MemberName::_vmtarget_offset;
2708 int java_lang_invoke_MemberName::_vmloader_offset;
2709 int java_lang_invoke_MemberName::_vmindex_offset;
2710 
2711 int java_lang_invoke_LambdaForm::_vmentry_offset;
2712 
2713 void java_lang_invoke_MethodHandle::compute_offsets() {
2714   Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2715   if (klass_oop != NULL) {
2716     compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2717     compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2718   }
2719 }
2720 
2721 void java_lang_invoke_MemberName::compute_offsets() {
2722   Klass* klass_oop = SystemDictionary::MemberName_klass();
2723   if (klass_oop != NULL) {
2724     compute_offset(_clazz_offset,     klass_oop, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2725     compute_offset(_name_offset,      klass_oop, vmSymbols::name_name(),      vmSymbols::string_signature());
2726     compute_offset(_type_offset,      klass_oop, vmSymbols::type_name(),      vmSymbols::object_signature());
2727     compute_offset(_flags_offset,     klass_oop, vmSymbols::flags_name(),     vmSymbols::int_signature());
2728     MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2729   }
2730 }
2731 
2732 void java_lang_invoke_LambdaForm::compute_offsets() {
2733   Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2734   if (klass_oop != NULL) {
2735     compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2736   }
2737 }
2738 
2739 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2740   return obj != NULL && is_subclass(obj->klass());
2741 }
2742 
2743 
2744 oop java_lang_invoke_MethodHandle::type(oop mh) {
2745   return mh->obj_field(_type_offset);
2746 }
2747 
2748 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2749   mh->obj_field_put(_type_offset, mtype);
2750 }
2751 
2752 oop java_lang_invoke_MethodHandle::form(oop mh) {
2753   assert(_form_offset != 0, "");
2754   return mh->obj_field(_form_offset);
2755 }
2756 
2757 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2758   assert(_form_offset != 0, "");
2759   mh->obj_field_put(_form_offset, lform);
2760 }
2761 
2762 /// MemberName accessors
2763 
2764 oop java_lang_invoke_MemberName::clazz(oop mname) {
2765   assert(is_instance(mname), "wrong type");
2766   return mname->obj_field(_clazz_offset);
2767 }
2768 
2769 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2770   assert(is_instance(mname), "wrong type");
2771   mname->obj_field_put(_clazz_offset, clazz);
2772 }
2773 
2774 oop java_lang_invoke_MemberName::name(oop mname) {
2775   assert(is_instance(mname), "wrong type");
2776   return mname->obj_field(_name_offset);
2777 }
2778 
2779 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2780   assert(is_instance(mname), "wrong type");
2781   mname->obj_field_put(_name_offset, name);
2782 }
2783 
2784 oop java_lang_invoke_MemberName::type(oop mname) {
2785   assert(is_instance(mname), "wrong type");
2786   return mname->obj_field(_type_offset);
2787 }
2788 
2789 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2790   assert(is_instance(mname), "wrong type");
2791   mname->obj_field_put(_type_offset, type);
2792 }
2793 
2794 int java_lang_invoke_MemberName::flags(oop mname) {
2795   assert(is_instance(mname), "wrong type");
2796   return mname->int_field(_flags_offset);
2797 }
2798 
2799 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2800   assert(is_instance(mname), "wrong type");
2801   mname->int_field_put(_flags_offset, flags);
2802 }
2803 
2804 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2805   assert(is_instance(mname), "wrong type");
2806   return (Metadata*)mname->address_field(_vmtarget_offset);
2807 }
2808 
2809 bool java_lang_invoke_MemberName::is_method(oop mname) {
2810   assert(is_instance(mname), "must be MemberName");
2811   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2812 }
2813 
2814 #if INCLUDE_JVMTI
2815 // Can be executed on VM thread only
2816 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method,
2817                                                   Method* new_method, bool* trace_name_printed) {
2818   assert(is_method(mname), "wrong type");
2819   assert(Thread::current()->is_VM_thread(), "not VM thread");
2820 
2821   Method* target = (Method*)mname->address_field(_vmtarget_offset);
2822   if (target == old_method) {
2823     mname->address_field_put(_vmtarget_offset, (address)new_method);
2824 
2825     if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) {
2826       if (!(*trace_name_printed)) {
2827         // RC_TRACE_MESG macro has an embedded ResourceMark
2828         RC_TRACE_MESG(("adjust: name=%s",
2829                        old_method->method_holder()->external_name()));
2830         *trace_name_printed = true;
2831       }
2832       // RC_TRACE macro has an embedded ResourceMark
2833       RC_TRACE(0x00400000, ("MemberName method update: %s(%s)",
2834                             new_method->name()->as_C_string(),
2835                             new_method->signature()->as_C_string()));
2836     }
2837   }
2838 }
2839 #endif // INCLUDE_JVMTI
2840 
2841 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2842   assert(is_instance(mname), "wrong type");
2843   // check the type of the vmtarget
2844   oop dependency = NULL;
2845   if (ref != NULL) {
2846     switch (flags(mname) & (MN_IS_METHOD |
2847                             MN_IS_CONSTRUCTOR |
2848                             MN_IS_FIELD)) {
2849     case MN_IS_METHOD:
2850     case MN_IS_CONSTRUCTOR:
2851       assert(ref->is_method(), "should be a method");
2852       dependency = ((Method*)ref)->method_holder()->java_mirror();
2853       break;
2854     case MN_IS_FIELD:
2855       assert(ref->is_klass(), "should be a class");
2856       dependency = ((Klass*)ref)->java_mirror();
2857       break;
2858     default:
2859       ShouldNotReachHere();
2860     }
2861   }
2862   mname->address_field_put(_vmtarget_offset, (address)ref);
2863   // Add a reference to the loader (actually mirror because anonymous classes will not have
2864   // distinct loaders) to ensure the metadata is kept alive
2865   // This mirror may be different than the one in clazz field.
2866   mname->obj_field_put(_vmloader_offset, dependency);
2867 }
2868 
2869 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2870   assert(is_instance(mname), "wrong type");
2871   return (intptr_t) mname->address_field(_vmindex_offset);
2872 }
2873 
2874 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2875   assert(is_instance(mname), "wrong type");
2876   mname->address_field_put(_vmindex_offset, (address) index);
2877 }
2878 
2879 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2880   assert(is_instance(lform), "wrong type");
2881   return lform->obj_field(_vmentry_offset);
2882 }
2883 
2884 
2885 // Support for java_lang_invoke_MethodType
2886 
2887 int java_lang_invoke_MethodType::_rtype_offset;
2888 int java_lang_invoke_MethodType::_ptypes_offset;
2889 
2890 void java_lang_invoke_MethodType::compute_offsets() {
2891   Klass* k = SystemDictionary::MethodType_klass();
2892   if (k != NULL) {
2893     compute_offset(_rtype_offset,  k, vmSymbols::rtype_name(),  vmSymbols::class_signature());
2894     compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2895   }
2896 }
2897 
2898 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2899   st->print("(");
2900   objArrayOop pts = ptypes(mt);
2901   for (int i = 0, limit = pts->length(); i < limit; i++) {
2902     java_lang_Class::print_signature(pts->obj_at(i), st);
2903   }
2904   st->print(")");
2905   java_lang_Class::print_signature(rtype(mt), st);
2906 }
2907 
2908 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2909   ResourceMark rm;
2910   stringStream buffer(128);
2911   print_signature(mt, &buffer);
2912   const char* sigstr =       buffer.base();
2913   int         siglen = (int) buffer.size();
2914   Symbol *name;
2915   if (!intern_if_not_found) {
2916     name = SymbolTable::probe(sigstr, siglen);
2917   } else {
2918     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2919   }
2920   return name;
2921 }
2922 
2923 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2924   if (mt1 == mt2)
2925     return true;
2926   if (rtype(mt1) != rtype(mt2))
2927     return false;
2928   if (ptype_count(mt1) != ptype_count(mt2))
2929     return false;
2930   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2931     if (ptype(mt1, i) != ptype(mt2, i))
2932       return false;
2933   }
2934   return true;
2935 }
2936 
2937 oop java_lang_invoke_MethodType::rtype(oop mt) {
2938   assert(is_instance(mt), "must be a MethodType");
2939   return mt->obj_field(_rtype_offset);
2940 }
2941 
2942 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2943   assert(is_instance(mt), "must be a MethodType");
2944   return (objArrayOop) mt->obj_field(_ptypes_offset);
2945 }
2946 
2947 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2948   return ptypes(mt)->obj_at(idx);
2949 }
2950 
2951 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2952   return ptypes(mt)->length();
2953 }
2954 
2955 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2956   objArrayOop pts = ptypes(mt);
2957   int count = pts->length();
2958   int slots = 0;
2959   for (int i = 0; i < count; i++) {
2960     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2961     slots += type2size[bt];
2962   }
2963   return slots;
2964 }
2965 
2966 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2967   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2968   return type2size[bt];
2969 }
2970 
2971 
2972 // Support for java_lang_invoke_CallSite
2973 
2974 int java_lang_invoke_CallSite::_target_offset;
2975 
2976 void java_lang_invoke_CallSite::compute_offsets() {
2977   Klass* k = SystemDictionary::CallSite_klass();
2978   if (k != NULL) {
2979     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2980   }
2981 }
2982 
2983 
2984 // Support for java_security_AccessControlContext
2985 
2986 int java_security_AccessControlContext::_context_offset = 0;
2987 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2988 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2989 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2990 
2991 void java_security_AccessControlContext::compute_offsets() {
2992   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2993   fieldDescriptor fd;
2994   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2995 
2996   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2997     fatal("Invalid layout of java.security.AccessControlContext");
2998   }
2999   _context_offset = fd.offset();
3000 
3001   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3002     fatal("Invalid layout of java.security.AccessControlContext");
3003   }
3004   _privilegedContext_offset = fd.offset();
3005 
3006   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3007     fatal("Invalid layout of java.security.AccessControlContext");
3008   }
3009   _isPrivileged_offset = fd.offset();
3010 
3011   // The offset may not be present for bootstrapping with older JDK.
3012   if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3013     _isAuthorized_offset = fd.offset();
3014   }
3015 }
3016 
3017 
3018 bool java_security_AccessControlContext::is_authorized(Handle context) {
3019   assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3020   assert(_isAuthorized_offset != -1, "should be set");
3021   return context->bool_field(_isAuthorized_offset) != 0;
3022 }
3023 
3024 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3025   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3026   // Ensure klass is initialized
3027   InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3028   // Allocate result
3029   oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3030   // Fill in values
3031   result->obj_field_put(_context_offset, context());
3032   result->obj_field_put(_privilegedContext_offset, privileged_context());
3033   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3034   // whitelist AccessControlContexts created by the JVM if present
3035   if (_isAuthorized_offset != -1) {
3036     result->bool_field_put(_isAuthorized_offset, true);
3037   }
3038   return result;
3039 }
3040 
3041 
3042 // Support for java_lang_ClassLoader
3043 
3044 bool java_lang_ClassLoader::offsets_computed = false;
3045 int  java_lang_ClassLoader::_loader_data_offset = -1;
3046 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3047 
3048 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3049     assert(loader != NULL && loader->is_oop(), "loader must be oop");
3050     return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3051 }
3052 
3053 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3054   return *java_lang_ClassLoader::loader_data_addr(loader);
3055 }
3056 
3057 void java_lang_ClassLoader::compute_offsets() {
3058   assert(!offsets_computed, "offsets should be initialized only once");
3059   offsets_computed = true;
3060 
3061   // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3062   Klass* k1 = SystemDictionary::ClassLoader_klass();
3063   compute_optional_offset(parallelCapable_offset,
3064     k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3065 
3066   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3067 }
3068 
3069 oop java_lang_ClassLoader::parent(oop loader) {
3070   assert(is_instance(loader), "loader must be oop");
3071   return loader->obj_field(parent_offset);
3072 }
3073 
3074 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3075   assert(is_instance(loader), "loader must be oop");
3076   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3077   oop acl = loader;
3078   debug_only(jint loop_count = 0);
3079   // This loop taken verbatim from ClassLoader.java:
3080   do {
3081     acl = parent(acl);
3082     if (cl == acl) {
3083       return true;
3084     }
3085     assert(++loop_count > 0, "loop_count overflow");
3086   } while (acl != NULL);
3087   return false;
3088 }
3089 
3090 bool java_lang_ClassLoader::is_instance(oop obj) {
3091   return obj != NULL && is_subclass(obj->klass());
3092 }
3093 
3094 
3095 // For class loader classes, parallelCapable defined
3096 // based on non-null field
3097 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3098 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3099   if (parallelCapable_offset == -1) {
3100      // Default for backward compatibility is false
3101      return false;
3102   }
3103   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3104 }
3105 
3106 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3107   // Fix for 4474172; see evaluation for more details
3108   loader = non_reflection_class_loader(loader);
3109 
3110   oop cl = SystemDictionary::java_system_loader();
3111   while(cl != NULL) {
3112     if (cl == loader) return true;
3113     cl = parent(cl);
3114   }
3115   return false;
3116 }
3117 
3118 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3119   if (loader != NULL) {
3120     // See whether this is one of the class loaders associated with
3121     // the generated bytecodes for reflection, and if so, "magically"
3122     // delegate to its parent to prevent class loading from occurring
3123     // in places where applications using reflection didn't expect it.
3124     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3125     // This might be null in non-1.4 JDKs
3126     if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3127       return parent(loader);
3128     }
3129   }
3130   return loader;
3131 }
3132 
3133 
3134 // Support for java_lang_System
3135 int java_lang_System::in_offset_in_bytes() {
3136   return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3137 }
3138 
3139 
3140 int java_lang_System::out_offset_in_bytes() {
3141   return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3142 }
3143 
3144 
3145 int java_lang_System::err_offset_in_bytes() {
3146   return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3147 }
3148 
3149 
3150 bool java_lang_System::has_security_manager() {
3151   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3152   address addr = ik->static_field_addr(static_security_offset);
3153   if (UseCompressedOops) {
3154     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3155   } else {
3156     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3157   }
3158 }
3159 
3160 int java_lang_Class::_klass_offset;
3161 int java_lang_Class::_array_klass_offset;
3162 int java_lang_Class::_oop_size_offset;
3163 int java_lang_Class::_static_oop_field_count_offset;
3164 int java_lang_Class::_class_loader_offset;
3165 int java_lang_Class::_protection_domain_offset;
3166 int java_lang_Class::_component_mirror_offset;
3167 int java_lang_Class::_init_lock_offset;
3168 int java_lang_Class::_signers_offset;
3169 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3170 int java_lang_Throwable::backtrace_offset;
3171 int java_lang_Throwable::detailMessage_offset;
3172 int java_lang_Throwable::cause_offset;
3173 int java_lang_Throwable::stackTrace_offset;
3174 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3175 int java_lang_reflect_AccessibleObject::override_offset;
3176 int java_lang_reflect_Method::clazz_offset;
3177 int java_lang_reflect_Method::name_offset;
3178 int java_lang_reflect_Method::returnType_offset;
3179 int java_lang_reflect_Method::parameterTypes_offset;
3180 int java_lang_reflect_Method::exceptionTypes_offset;
3181 int java_lang_reflect_Method::slot_offset;
3182 int java_lang_reflect_Method::modifiers_offset;
3183 int java_lang_reflect_Method::signature_offset;
3184 int java_lang_reflect_Method::annotations_offset;
3185 int java_lang_reflect_Method::parameter_annotations_offset;
3186 int java_lang_reflect_Method::annotation_default_offset;
3187 int java_lang_reflect_Method::type_annotations_offset;
3188 int java_lang_reflect_Constructor::clazz_offset;
3189 int java_lang_reflect_Constructor::parameterTypes_offset;
3190 int java_lang_reflect_Constructor::exceptionTypes_offset;
3191 int java_lang_reflect_Constructor::slot_offset;
3192 int java_lang_reflect_Constructor::modifiers_offset;
3193 int java_lang_reflect_Constructor::signature_offset;
3194 int java_lang_reflect_Constructor::annotations_offset;
3195 int java_lang_reflect_Constructor::parameter_annotations_offset;
3196 int java_lang_reflect_Constructor::type_annotations_offset;
3197 int java_lang_reflect_Field::clazz_offset;
3198 int java_lang_reflect_Field::name_offset;
3199 int java_lang_reflect_Field::type_offset;
3200 int java_lang_reflect_Field::slot_offset;
3201 int java_lang_reflect_Field::modifiers_offset;
3202 int java_lang_reflect_Field::signature_offset;
3203 int java_lang_reflect_Field::annotations_offset;
3204 int java_lang_reflect_Field::type_annotations_offset;
3205 int java_lang_reflect_Parameter::name_offset;
3206 int java_lang_reflect_Parameter::modifiers_offset;
3207 int java_lang_reflect_Parameter::index_offset;
3208 int java_lang_reflect_Parameter::executable_offset;
3209 int java_lang_boxing_object::value_offset;
3210 int java_lang_boxing_object::long_value_offset;
3211 int java_lang_ref_Reference::referent_offset;
3212 int java_lang_ref_Reference::queue_offset;
3213 int java_lang_ref_Reference::next_offset;
3214 int java_lang_ref_Reference::discovered_offset;
3215 int java_lang_ref_Reference::static_lock_offset;
3216 int java_lang_ref_Reference::static_pending_offset;
3217 int java_lang_ref_Reference::number_of_fake_oop_fields;
3218 int java_lang_ref_SoftReference::timestamp_offset;
3219 int java_lang_ref_SoftReference::static_clock_offset;
3220 int java_lang_ClassLoader::parent_offset;
3221 int java_lang_System::static_in_offset;
3222 int java_lang_System::static_out_offset;
3223 int java_lang_System::static_err_offset;
3224 int java_lang_System::static_security_offset;
3225 int java_lang_StackTraceElement::declaringClass_offset;
3226 int java_lang_StackTraceElement::methodName_offset;
3227 int java_lang_StackTraceElement::fileName_offset;
3228 int java_lang_StackTraceElement::lineNumber_offset;
3229 int java_lang_AssertionStatusDirectives::classes_offset;
3230 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3231 int java_lang_AssertionStatusDirectives::packages_offset;
3232 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3233 int java_lang_AssertionStatusDirectives::deflt_offset;
3234 int java_nio_Buffer::_limit_offset;
3235 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3236 int sun_reflect_ConstantPool::_oop_offset;
3237 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3238 
3239 
3240 // Support for java_lang_StackTraceElement
3241 
3242 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3243   element->obj_field_put(fileName_offset, value);
3244 }
3245 
3246 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3247   element->obj_field_put(declaringClass_offset, value);
3248 }
3249 
3250 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3251   element->obj_field_put(methodName_offset, value);
3252 }
3253 
3254 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3255   element->int_field_put(lineNumber_offset, value);
3256 }
3257 
3258 
3259 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3260 
3261 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3262   o->obj_field_put(classes_offset, val);
3263 }
3264 
3265 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3266   o->obj_field_put(classEnabled_offset, val);
3267 }
3268 
3269 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3270   o->obj_field_put(packages_offset, val);
3271 }
3272 
3273 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3274   o->obj_field_put(packageEnabled_offset, val);
3275 }
3276 
3277 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3278   o->bool_field_put(deflt_offset, val);
3279 }
3280 
3281 
3282 // Support for intrinsification of java.nio.Buffer.checkIndex
3283 int java_nio_Buffer::limit_offset() {
3284   return _limit_offset;
3285 }
3286 
3287 
3288 void java_nio_Buffer::compute_offsets() {
3289   Klass* k = SystemDictionary::nio_Buffer_klass();
3290   assert(k != NULL, "must be loaded in 1.4+");
3291   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3292 }
3293 
3294 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3295   if (_owner_offset != 0) return;
3296 
3297   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3298   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3299   compute_offset(_owner_offset, k,
3300                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3301 }
3302 
3303 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3304   assert(_owner_offset != 0, "Must be initialized");
3305   return obj->obj_field(_owner_offset);
3306 }
3307 
3308 // Compute hard-coded offsets
3309 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3310 // are not available to determine the offset_of_static_fields.
3311 void JavaClasses::compute_hard_coded_offsets() {
3312   const int x = heapOopSize;
3313   const int header = instanceOopDesc::base_offset_in_bytes();
3314 
3315   // Throwable Class
3316   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3317   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3318   java_lang_Throwable::cause_offset      = java_lang_Throwable::hc_cause_offset      * x + header;
3319   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3320   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3321 
3322   // java_lang_boxing_object
3323   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3324   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3325 
3326   // java_lang_ref_Reference:
3327   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3328   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3329   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3330   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3331   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3332   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3333   // Artificial fields for java_lang_ref_Reference
3334   // The first field is for the discovered field added in 1.4
3335   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3336 
3337   // java_lang_ref_SoftReference Class
3338   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3339   // Don't multiply static fields because they are always in wordSize units
3340   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3341 
3342   // java_lang_ClassLoader
3343   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3344 
3345   // java_lang_System
3346   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
3347   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3348   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3349   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3350 
3351   // java_lang_StackTraceElement
3352   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3353   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3354   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3355   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3356   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3357   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3358   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3359   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3360   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3361 
3362 }
3363 
3364 
3365 // Compute non-hard-coded field offsets of all the classes in this file
3366 void JavaClasses::compute_offsets() {
3367   // java_lang_Class::compute_offsets was called earlier in bootstrap
3368   java_lang_ClassLoader::compute_offsets();
3369   java_lang_Thread::compute_offsets();
3370   java_lang_ThreadGroup::compute_offsets();
3371   java_lang_invoke_MethodHandle::compute_offsets();
3372   java_lang_invoke_DirectMethodHandle::compute_offsets();
3373   java_lang_invoke_MemberName::compute_offsets();
3374   java_lang_invoke_LambdaForm::compute_offsets();
3375   java_lang_invoke_MethodType::compute_offsets();
3376   java_lang_invoke_CallSite::compute_offsets();
3377   java_security_AccessControlContext::compute_offsets();
3378   // Initialize reflection classes. The layouts of these classes
3379   // changed with the new reflection implementation in JDK 1.4, and
3380   // since the Universe doesn't know what JDK version it is until this
3381   // point we defer computation of these offsets until now.
3382   java_lang_reflect_AccessibleObject::compute_offsets();
3383   java_lang_reflect_Method::compute_offsets();
3384   java_lang_reflect_Constructor::compute_offsets();
3385   java_lang_reflect_Field::compute_offsets();
3386   java_nio_Buffer::compute_offsets();
3387   sun_reflect_ConstantPool::compute_offsets();
3388   sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3389   java_lang_reflect_Parameter::compute_offsets();
3390 
3391   // generated interpreter code wants to know about the offsets we just computed:
3392   AbstractAssembler::update_delayed_values();
3393 }
3394 
3395 #ifndef PRODUCT
3396 
3397 // These functions exist to assert the validity of hard-coded field offsets to guard
3398 // against changes in the class files
3399 
3400 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3401   EXCEPTION_MARK;
3402   fieldDescriptor fd;
3403   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3404   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3405   instanceKlassHandle h_klass (THREAD, k);
3406   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3407   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3408   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3409     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3410     return false;
3411   }
3412   if (fd.is_static()) {
3413     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3414     return false;
3415   }
3416   if (fd.offset() == hardcoded_offset ) {
3417     return true;
3418   } else {
3419     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3420                   klass_name, field_name, hardcoded_offset, fd.offset());
3421     return false;
3422   }
3423 }
3424 
3425 
3426 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3427   EXCEPTION_MARK;
3428   fieldDescriptor fd;
3429   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3430   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3431   instanceKlassHandle h_klass (THREAD, k);
3432   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3433   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3434   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3435     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3436     return false;
3437   }
3438   if (!fd.is_static()) {
3439     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3440     return false;
3441   }
3442   if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3443     return true;
3444   } else {
3445     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());
3446     return false;
3447   }
3448 }
3449 
3450 
3451 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3452   EXCEPTION_MARK;
3453   fieldDescriptor fd;
3454   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3455   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3456   instanceKlassHandle h_klass (THREAD, k);
3457   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3458   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3459   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3460     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3461     return false;
3462   }
3463   if (!fd.is_static() || !fd.has_initial_value()) {
3464     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3465     return false;
3466   }
3467   if (!fd.initial_value_tag().is_int()) {
3468     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3469     return false;
3470   }
3471   jint field_value = fd.int_initial_value();
3472   if (field_value == hardcoded_constant) {
3473     return true;
3474   } else {
3475     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);
3476     return false;
3477   }
3478 }
3479 
3480 
3481 // Check the hard-coded field offsets of all the classes in this file
3482 
3483 void JavaClasses::check_offsets() {
3484   bool valid = true;
3485   HandleMark hm;
3486 
3487 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3488   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3489 
3490 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3491   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3492 
3493 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3494   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3495 
3496 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3497   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3498 
3499   // java.lang.String
3500 
3501   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3502   if (java_lang_String::has_offset_field()) {
3503     CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3504     CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3505   }
3506   if (java_lang_String::has_hash_field()) {
3507     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3508   }
3509 
3510   // java.lang.Class
3511 
3512   // Fake fields
3513   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3514   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3515 
3516   // java.lang.Throwable
3517 
3518   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3519   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3520   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3521   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3522 
3523   // Boxed primitive objects (java_lang_boxing_object)
3524 
3525   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3526   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3527   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3528   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3529   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3530   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3531   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3532   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3533 
3534   // java.lang.ClassLoader
3535 
3536   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
3537 
3538   // java.lang.System
3539 
3540   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3541   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3542   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3543   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3544 
3545   // java.lang.StackTraceElement
3546 
3547   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3548   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3549   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement,   fileName, "Ljava/lang/String;");
3550   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3551 
3552   // java.lang.ref.Reference
3553 
3554   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3555   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3556   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3557   // Fake field
3558   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3559   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3560   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3561 
3562   // java.lang.ref.SoftReference
3563 
3564   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3565   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3566 
3567   // java.lang.AssertionStatusDirectives
3568   //
3569   // The CheckAssertionStatusDirectives boolean can be removed from here and
3570   // globals.hpp after the AssertionStatusDirectives class has been integrated
3571   // into merlin "for some time."  Without it, the vm will fail with early
3572   // merlin builds.
3573 
3574   if (CheckAssertionStatusDirectives) {
3575     const char* nm = "java/lang/AssertionStatusDirectives";
3576     const char* sig = "[Ljava/lang/String;";
3577     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3578     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3579     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3580     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3581     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3582   }
3583 
3584   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3585 }
3586 
3587 #endif // PRODUCT
3588 
3589 int InjectedField::compute_offset() {
3590   Klass* klass_oop = klass();
3591   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3592     if (!may_be_java && !fs.access_flags().is_internal()) {
3593       // Only look at injected fields
3594       continue;
3595     }
3596     if (fs.name() == name() && fs.signature() == signature()) {
3597       return fs.offset();
3598     }
3599   }
3600   ResourceMark rm;
3601   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)" : "");
3602 #ifndef PRODUCT
3603   klass_oop->print();
3604   tty->print_cr("all fields:");
3605   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3606     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3607   }
3608 #endif //PRODUCT
3609   fatal("Invalid layout of preloaded class");
3610   return -1;
3611 }
3612 
3613 void javaClasses_init() {
3614   JavaClasses::compute_offsets();
3615   JavaClasses::check_offsets();
3616   FilteredFieldsMap::initialize();  // must be done after computing offsets.
3617 }