1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/altHashing.hpp"
  27 #include "classfile/javaClasses.hpp"
  28 #include "classfile/symbolTable.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/debugInfo.hpp"
  31 #include "code/pcDesc.hpp"
  32 #include "compiler/compilerOracle.hpp"
  33 #include "interpreter/interpreter.hpp"
  34 #include "memory/oopFactory.hpp"
  35 #include "memory/resourceArea.hpp"
  36 #include "memory/universe.inline.hpp"
  37 #include "oops/fieldStreams.hpp"
  38 #include "oops/instanceKlass.hpp"
  39 #include "oops/instanceMirrorKlass.hpp"
  40 #include "oops/klass.hpp"
  41 #include "oops/method.hpp"
  42 #include "oops/symbol.hpp"
  43 #include "oops/typeArrayOop.hpp"
  44 #include "prims/jvmtiRedefineClassesTrace.hpp"
  45 #include "runtime/fieldDescriptor.hpp"
  46 #include "runtime/handles.inline.hpp"
  47 #include "runtime/interfaceSupport.hpp"
  48 #include "runtime/java.hpp"
  49 #include "runtime/javaCalls.hpp"
  50 #include "runtime/safepoint.hpp"
  51 #include "runtime/thread.inline.hpp"
  52 #include "runtime/vframe.hpp"
  53 #include "utilities/preserveException.hpp"
  54 
  55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  56 
  57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  58   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  59 
  60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  61   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  62 
  63 InjectedField JavaClasses::_injected_fields[] = {
  64   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  65 };
  66 
  67 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  68   return _injected_fields[id].compute_offset();
  69 }
  70 
  71 
  72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  73   *field_count = 0;
  74 
  75   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  76   if (sid == vmSymbols::NO_SID) {
  77     // Only well known classes can inject fields
  78     return NULL;
  79   }
  80 
  81   int count = 0;
  82   int start = -1;
  83 
  84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
  85   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
  86     count++;                                                       \
  87     if (start == -1) start = klass##_##name##_enum;                \
  88   }
  89   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
  90 #undef LOOKUP_INJECTED_FIELD
  91 
  92   if (start != -1) {
  93     *field_count = count;
  94     return _injected_fields + start;
  95   }
  96   return NULL;
  97 }
  98 
  99 
 100 static bool find_field(InstanceKlass* ik,
 101                        Symbol* name_symbol, Symbol* signature_symbol,
 102                        fieldDescriptor* fd,
 103                        bool allow_super = false) {
 104   if (allow_super)
 105     return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
 106   else
 107     return ik->find_local_field(name_symbol, signature_symbol, fd);
 108 }
 109 
 110 // Helpful routine for computing field offsets at run time rather than hardcoding them
 111 static void
 112 compute_offset(int &dest_offset,
 113                Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
 114                bool allow_super = false) {
 115   fieldDescriptor fd;
 116   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 117   if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
 118     ResourceMark rm;
 119     tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
 120 #ifndef PRODUCT
 121     klass_oop->print();
 122     tty->print_cr("all fields:");
 123     for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
 124       tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
 125     }
 126 #endif //PRODUCT
 127     vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
 128   }
 129   dest_offset = fd.offset();
 130 }
 131 
 132 // Same as above but for "optional" offsets that might not be present in certain JDK versions
 133 static void
 134 compute_optional_offset(int& dest_offset,
 135                         Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
 136                         bool allow_super = false) {
 137   fieldDescriptor fd;
 138   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 139   if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
 140     dest_offset = fd.offset();
 141   }
 142 }
 143 
 144 
 145 int java_lang_String::value_offset  = 0;
 146 int java_lang_String::offset_offset = 0;
 147 int java_lang_String::count_offset  = 0;
 148 int java_lang_String::hash_offset   = 0;
 149 
 150 bool java_lang_String::initialized  = false;
 151 
 152 void java_lang_String::compute_offsets() {
 153   assert(!initialized, "offsets should be initialized only once");
 154 
 155   Klass* k = SystemDictionary::String_klass();
 156   compute_offset(value_offset,           k, vmSymbols::value_name(),  vmSymbols::char_array_signature());
 157   compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
 158   compute_optional_offset(count_offset,  k, vmSymbols::count_name(),  vmSymbols::int_signature());
 159   compute_optional_offset(hash_offset,   k, vmSymbols::hash_name(),   vmSymbols::int_signature());
 160 
 161   initialized = true;
 162 }
 163 
 164 Handle java_lang_String::basic_create(int length, TRAPS) {
 165   assert(initialized, "Must be initialized");
 166   // Create the String object first, so there's a chance that the String
 167   // and the char array it points to end up in the same cache line.
 168   oop obj;
 169   obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
 170 
 171   // Create the char array.  The String object must be handlized here
 172   // because GC can happen as a result of the allocation attempt.
 173   Handle h_obj(THREAD, obj);
 174   typeArrayOop buffer;
 175     buffer = oopFactory::new_charArray(length, CHECK_NH);
 176 
 177   // Point the String at the char array
 178   obj = h_obj();
 179   set_value(obj, buffer);
 180   // No need to zero the offset, allocation zero'ed the entire String object
 181   assert(offset(obj) == 0, "initial String offset should be zero");
 182 //set_offset(obj, 0);
 183   set_count(obj, length);
 184 
 185   return h_obj;
 186 }
 187 
 188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
 189   Handle h_obj = basic_create(length, CHECK_NH);
 190   typeArrayOop buffer = value(h_obj());
 191   for (int index = 0; index < length; index++) {
 192     buffer->char_at_put(index, unicode[index]);
 193   }
 194   return h_obj;
 195 }
 196 
 197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
 198   Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
 199   return h_obj();
 200 }
 201 
 202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 203   if (utf8_str == NULL) {
 204     return Handle();
 205   }
 206   int length = UTF8::unicode_length(utf8_str);
 207   Handle h_obj = basic_create(length, CHECK_NH);
 208   if (length > 0) {
 209     UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 210   }
 211   return h_obj;
 212 }
 213 
 214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 215   Handle h_obj = create_from_str(utf8_str, CHECK_0);
 216   return h_obj();
 217 }
 218 
 219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 220   int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
 221   Handle h_obj = basic_create(length, CHECK_NH);
 222   if (length > 0) {
 223     UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
 224   }
 225   return h_obj;
 226 }
 227 
 228 // Converts a C string to a Java String based on current encoding
 229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 230   assert(str != NULL, "bad arguments");
 231 
 232   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 233   static to_java_string_fn_t _to_java_string_fn = NULL;
 234 
 235   if (_to_java_string_fn == NULL) {
 236     void *lib_handle = os::native_java_library();
 237     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 238     if (_to_java_string_fn == NULL) {
 239       fatal("NewStringPlatform missing");
 240     }
 241   }
 242 
 243   jstring js = NULL;
 244   { JavaThread* thread = (JavaThread*)THREAD;
 245     assert(thread->is_Java_thread(), "must be java thread");
 246     HandleMark hm(thread);
 247     ThreadToNativeFromVM ttn(thread);
 248     js = (_to_java_string_fn)(thread->jni_environment(), str);
 249   }
 250   return Handle(THREAD, JNIHandles::resolve(js));
 251 }
 252 
 253 // Converts a Java String to a native C string that can be used for
 254 // native OS calls.
 255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 256 
 257   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 258   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 259 
 260   if (_to_platform_string_fn == NULL) {
 261     void *lib_handle = os::native_java_library();
 262     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 263     if (_to_platform_string_fn == NULL) {
 264       fatal("GetStringPlatformChars missing");
 265     }
 266   }
 267 
 268   char *native_platform_string;
 269   { JavaThread* thread = (JavaThread*)THREAD;
 270     assert(thread->is_Java_thread(), "must be java thread");
 271     JNIEnv *env = thread->jni_environment();
 272     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 273     bool is_copy;
 274     HandleMark hm(thread);
 275     ThreadToNativeFromVM ttn(thread);
 276     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 277     assert(is_copy == JNI_TRUE, "is_copy value changed");
 278     JNIHandles::destroy_local(js);
 279   }
 280   return native_platform_string;
 281 }
 282 
 283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 284   oop          obj    = java_string();
 285   // Typical usage is to convert all '/' to '.' in string.
 286   typeArrayOop value  = java_lang_String::value(obj);
 287   int          offset = java_lang_String::offset(obj);
 288   int          length = java_lang_String::length(obj);
 289 
 290   // First check if any from_char exist
 291   int index; // Declared outside, used later
 292   for (index = 0; index < length; index++) {
 293     if (value->char_at(index + offset) == from_char) {
 294       break;
 295     }
 296   }
 297   if (index == length) {
 298     // No from_char, so do not copy.
 299     return java_string;
 300   }
 301 
 302   // Create new UNICODE buffer. Must handlize value because GC
 303   // may happen during String and char array creation.
 304   typeArrayHandle h_value(THREAD, value);
 305   Handle string = basic_create(length, CHECK_NH);
 306 
 307   typeArrayOop from_buffer = h_value();
 308   typeArrayOop to_buffer   = java_lang_String::value(string());
 309 
 310   // Copy contents
 311   for (index = 0; index < length; index++) {
 312     jchar c = from_buffer->char_at(index + offset);
 313     if (c == from_char) {
 314       c = to_char;
 315     }
 316     to_buffer->char_at_put(index, c);
 317   }
 318   return string;
 319 }
 320 
 321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 322   typeArrayOop value  = java_lang_String::value(java_string);
 323   int          offset = java_lang_String::offset(java_string);
 324                length = java_lang_String::length(java_string);
 325 
 326   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 327   if (result != NULL) {
 328     for (int index = 0; index < length; index++) {
 329       result[index] = value->char_at(index + offset);
 330     }
 331   } else {
 332     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 333   }
 334   return result;
 335 }
 336 
 337 unsigned int java_lang_String::hash_code(oop java_string) {
 338   int          length = java_lang_String::length(java_string);
 339   // Zero length string will hash to zero with String.hashCode() function.
 340   if (length == 0) return 0;
 341 
 342   typeArrayOop value  = java_lang_String::value(java_string);
 343   int          offset = java_lang_String::offset(java_string);
 344   return java_lang_String::hash_code(value->char_at_addr(offset), length);
 345 }
 346 
 347 char* java_lang_String::as_quoted_ascii(oop java_string) {
 348   typeArrayOop value  = java_lang_String::value(java_string);
 349   int          offset = java_lang_String::offset(java_string);
 350   int          length = java_lang_String::length(java_string);
 351 
 352   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 353   if (base == NULL) return NULL;
 354 
 355   int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 356   char* result = NEW_RESOURCE_ARRAY(char, result_length);
 357   UNICODE::as_quoted_ascii(base, length, result, result_length);
 358   assert(result_length >= length + 1, "must not be shorter");
 359   assert(result_length == (int)strlen(result) + 1, "must match");
 360   return result;
 361 }
 362 
 363 unsigned int java_lang_String::hash_string(oop java_string) {
 364   int          length = java_lang_String::length(java_string);
 365   // Zero length string doesn't hash necessarily hash to zero.
 366   if (length == 0) {
 367     return StringTable::hash_string(NULL, 0);
 368   }
 369 
 370   typeArrayOop value  = java_lang_String::value(java_string);
 371   int          offset = java_lang_String::offset(java_string);
 372   return StringTable::hash_string(value->char_at_addr(offset), length);
 373 }
 374 
 375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
 376   oop          obj    = java_string();
 377   typeArrayOop value  = java_lang_String::value(obj);
 378   int          offset = java_lang_String::offset(obj);
 379   int          length = java_lang_String::length(obj);
 380   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 381   Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
 382   return sym;
 383 }
 384 
 385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 386   typeArrayOop value  = java_lang_String::value(java_string);
 387   int          offset = java_lang_String::offset(java_string);
 388   int          length = java_lang_String::length(java_string);
 389   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 390   return SymbolTable::probe_unicode(base, length);
 391 }
 392 
 393 
 394 int java_lang_String::utf8_length(oop java_string) {
 395   typeArrayOop value  = java_lang_String::value(java_string);
 396   int          offset = java_lang_String::offset(java_string);
 397   int          length = java_lang_String::length(java_string);
 398   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 399   return UNICODE::utf8_length(position, length);
 400 }
 401 
 402 char* java_lang_String::as_utf8_string(oop java_string) {
 403   typeArrayOop value  = java_lang_String::value(java_string);
 404   int          offset = java_lang_String::offset(java_string);
 405   int          length = java_lang_String::length(java_string);
 406   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 407   return UNICODE::as_utf8(position, length);
 408 }
 409 
 410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 411   typeArrayOop value  = java_lang_String::value(java_string);
 412   int          offset = java_lang_String::offset(java_string);
 413   int          length = java_lang_String::length(java_string);
 414   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 415   return UNICODE::as_utf8(position, length, buf, buflen);
 416 }
 417 
 418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 419   typeArrayOop value  = java_lang_String::value(java_string);
 420   int          offset = java_lang_String::offset(java_string);
 421   int          length = java_lang_String::length(java_string);
 422   assert(start + len <= length, "just checking");
 423   jchar* position = value->char_at_addr(offset + start);
 424   return UNICODE::as_utf8(position, len);
 425 }
 426 
 427 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
 428   assert(java_string->klass() == SystemDictionary::String_klass(),
 429          "must be java_string");
 430   typeArrayOop value  = java_lang_String::value(java_string);
 431   int          offset = java_lang_String::offset(java_string);
 432   int          length = java_lang_String::length(java_string);
 433   if (length != len) {
 434     return false;
 435   }
 436   for (int i = 0; i < len; i++) {
 437     if (value->char_at(i + offset) != chars[i]) {
 438       return false;
 439     }
 440   }
 441   return true;
 442 }
 443 
 444 bool java_lang_String::equals(oop str1, oop str2) {
 445   assert(str1->klass() == SystemDictionary::String_klass(),
 446          "must be java String");
 447   assert(str2->klass() == SystemDictionary::String_klass(),
 448          "must be java String");
 449   typeArrayOop value1  = java_lang_String::value(str1);
 450   int          offset1 = java_lang_String::offset(str1);
 451   int          length1 = java_lang_String::length(str1);
 452   typeArrayOop value2  = java_lang_String::value(str2);
 453   int          offset2 = java_lang_String::offset(str2);
 454   int          length2 = java_lang_String::length(str2);
 455 
 456   if (length1 != length2) {
 457     return false;
 458   }
 459   for (int i = 0; i < length1; i++) {
 460     if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
 461       return false;
 462     }
 463   }
 464   return true;
 465 }
 466 
 467 void java_lang_String::print(oop java_string, outputStream* st) {
 468   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 469   typeArrayOop value  = java_lang_String::value(java_string);
 470   int          offset = java_lang_String::offset(java_string);
 471   int          length = java_lang_String::length(java_string);
 472 
 473   int end = MIN2(length, 100);
 474   if (value == NULL) {
 475     // This can happen if, e.g., printing a String
 476     // object before its initializer has been called
 477     st->print_cr("NULL");
 478   } else {
 479     st->print("\"");
 480     for (int index = 0; index < length; index++) {
 481       st->print("%c", value->char_at(index + offset));
 482     }
 483     st->print("\"");
 484   }
 485 }
 486 
 487 
 488 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 489   assert(mirror.not_null() && fd->is_static(), "just checking");
 490   if (fd->has_initial_value()) {
 491     BasicType t = fd->field_type();
 492     switch (t) {
 493       case T_BYTE:
 494         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 495               break;
 496       case T_BOOLEAN:
 497         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 498               break;
 499       case T_CHAR:
 500         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 501               break;
 502       case T_SHORT:
 503         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 504               break;
 505       case T_INT:
 506         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 507         break;
 508       case T_FLOAT:
 509         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 510         break;
 511       case T_DOUBLE:
 512         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 513         break;
 514       case T_LONG:
 515         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 516         break;
 517       case T_OBJECT:
 518         {
 519           #ifdef ASSERT
 520           TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
 521           assert(fd->signature() == sym, "just checking");
 522           #endif
 523           oop string = fd->string_initial_value(CHECK);
 524           mirror()->obj_field_put(fd->offset(), string);
 525         }
 526         break;
 527       default:
 528         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 529                   "Illegal ConstantValue attribute in class file");
 530     }
 531   }
 532 }
 533 
 534 
 535 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
 536   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 537 
 538   // If the offset was read from the shared archive, it was fixed up already
 539   if (!k->is_shared()) {
 540     if (k->oop_is_instance()) {
 541       // During bootstrap, java.lang.Class wasn't loaded so static field
 542       // offsets were computed without the size added it.  Go back and
 543       // update all the static field offsets to included the size.
 544         for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
 545         if (fs.access_flags().is_static()) {
 546           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 547           fs.set_offset(real_offset);
 548         }
 549       }
 550     }
 551   }
 552   create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
 553 }
 554 
 555 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
 556                                                Handle mirror,
 557                                                Handle protection_domain,
 558                                                TRAPS) {
 559   // Allocate a simple java object for a lock.
 560   // This needs to be a java object because during class initialization
 561   // it can be held across a java call.
 562   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 563   set_init_lock(mirror(), r);
 564 
 565   // Set protection domain also
 566   set_protection_domain(mirror(), protection_domain());
 567 
 568   // Initialize static fields
 569   InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 570 }
 571 
 572 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
 573                                     Handle protection_domain, TRAPS) {
 574   assert(k->java_mirror() == NULL, "should only assign mirror once");
 575   // Use this moment of initialization to cache modifier_flags also,
 576   // to support Class.getModifiers().  Instance classes recalculate
 577   // the cached flags after the class file is parsed, but before the
 578   // class is put into the system dictionary.
 579   int computed_modifiers = k->compute_modifier_flags(CHECK);
 580   k->set_modifier_flags(computed_modifiers);
 581   // Class_klass has to be loaded because it is used to allocate
 582   // the mirror.
 583   if (SystemDictionary::Class_klass_loaded()) {
 584     // Allocate mirror (java.lang.Class instance)
 585     Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 586 
 587     // Setup indirection from mirror->klass
 588     if (!k.is_null()) {
 589       java_lang_Class::set_klass(mirror(), k());
 590     }
 591 
 592     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 593     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 594 
 595     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 596 
 597     // It might also have a component mirror.  This mirror must already exist.
 598     if (k->oop_is_array()) {
 599       Handle comp_mirror;
 600       if (k->oop_is_typeArray()) {
 601         BasicType type = TypeArrayKlass::cast(k())->element_type();
 602         comp_mirror = Universe::java_mirror(type);
 603       } else {
 604         assert(k->oop_is_objArray(), "Must be");
 605         Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
 606         assert(element_klass != NULL, "Must have an element klass");
 607         comp_mirror = element_klass->java_mirror();
 608       }
 609       assert(comp_mirror.not_null(), "must have a mirror");
 610 
 611       // Two-way link between the array klass and its component mirror:
 612       ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
 613       set_array_klass(comp_mirror(), k());
 614     } else {
 615       assert(k->oop_is_instance(), "Must be");
 616 
 617       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 618       if (HAS_PENDING_EXCEPTION) {
 619         // If any of the fields throws an exception like OOM remove the klass field
 620         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 621         // This mirror looks like a primitive type, which logically it is because it
 622         // it represents no class.
 623         java_lang_Class::set_klass(mirror(), NULL);
 624         return;
 625       }
 626     }
 627 
 628     // set the classLoader field in the java_lang_Class instance
 629     assert(class_loader() == k->class_loader(), "should be same");
 630     set_class_loader(mirror(), class_loader());
 631 
 632     // Setup indirection from klass->mirror last
 633     // after any exceptions can happen during allocations.
 634     if (!k.is_null()) {
 635       k->set_java_mirror(mirror());
 636     }
 637   } else {
 638     if (fixup_mirror_list() == NULL) {
 639       GrowableArray<Klass*>* list =
 640        new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 641       set_fixup_mirror_list(list);
 642     }
 643     fixup_mirror_list()->push(k());
 644   }
 645 }
 646 
 647 
 648 int  java_lang_Class::oop_size(oop java_class) {
 649   assert(_oop_size_offset != 0, "must be set");
 650   return java_class->int_field(_oop_size_offset);
 651 }
 652 void java_lang_Class::set_oop_size(oop java_class, int size) {
 653   assert(_oop_size_offset != 0, "must be set");
 654   java_class->int_field_put(_oop_size_offset, size);
 655 }
 656 int  java_lang_Class::static_oop_field_count(oop java_class) {
 657   assert(_static_oop_field_count_offset != 0, "must be set");
 658   return java_class->int_field(_static_oop_field_count_offset);
 659 }
 660 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
 661   assert(_static_oop_field_count_offset != 0, "must be set");
 662   java_class->int_field_put(_static_oop_field_count_offset, size);
 663 }
 664 
 665 oop java_lang_Class::protection_domain(oop java_class) {
 666   assert(_protection_domain_offset != 0, "must be set");
 667   return java_class->obj_field(_protection_domain_offset);
 668 }
 669 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
 670   assert(_protection_domain_offset != 0, "must be set");
 671   java_class->obj_field_put(_protection_domain_offset, pd);
 672 }
 673 
 674 oop java_lang_Class::init_lock(oop java_class) {
 675   assert(_init_lock_offset != 0, "must be set");
 676   return java_class->obj_field(_init_lock_offset);
 677 }
 678 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
 679   assert(_init_lock_offset != 0, "must be set");
 680   java_class->obj_field_put(_init_lock_offset, init_lock);
 681 }
 682 
 683 objArrayOop java_lang_Class::signers(oop java_class) {
 684   assert(_signers_offset != 0, "must be set");
 685   return (objArrayOop)java_class->obj_field(_signers_offset);
 686 }
 687 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
 688   assert(_signers_offset != 0, "must be set");
 689   java_class->obj_field_put(_signers_offset, (oop)signers);
 690 }
 691 
 692 
 693 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
 694   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
 695   if (_class_loader_offset != 0) {
 696     java_class->obj_field_put(_class_loader_offset, loader);
 697   }
 698 }
 699 
 700 oop java_lang_Class::class_loader(oop java_class) {
 701   assert(_class_loader_offset != 0, "must be set");
 702   return java_class->obj_field(_class_loader_offset);
 703 }
 704 
 705 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
 706   // This should be improved by adding a field at the Java level or by
 707   // introducing a new VM klass (see comment in ClassFileParser)
 708   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
 709   if (type != T_VOID) {
 710     Klass* aklass = Universe::typeArrayKlassObj(type);
 711     assert(aklass != NULL, "correct bootstrap");
 712     set_array_klass(java_class, aklass);
 713   }
 714 #ifdef ASSERT
 715   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
 716   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
 717 #endif
 718   return java_class;
 719 }
 720 
 721 
 722 Klass* java_lang_Class::as_Klass(oop java_class) {
 723   //%note memory_2
 724   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 725   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
 726   assert(k == NULL || k->is_klass(), "type check");
 727   return k;
 728 }
 729 
 730 
 731 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
 732   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 733   java_class->metadata_field_put(_klass_offset, klass);
 734 }
 735 
 736 
 737 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
 738   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 739   Symbol* name = NULL;
 740   bool is_instance = false;
 741   if (is_primitive(java_class)) {
 742     name = vmSymbols::type_signature(primitive_type(java_class));
 743   } else {
 744     Klass* k = as_Klass(java_class);
 745     is_instance = k->oop_is_instance();
 746     name = k->name();
 747   }
 748   if (name == NULL) {
 749     st->print("<null>");
 750     return;
 751   }
 752   if (is_instance)  st->print("L");
 753   st->write((char*) name->base(), (int) name->utf8_length());
 754   if (is_instance)  st->print(";");
 755 }
 756 
 757 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
 758   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 759   Symbol* name;
 760   if (is_primitive(java_class)) {
 761     name = vmSymbols::type_signature(primitive_type(java_class));
 762     // Because this can create a new symbol, the caller has to decrement
 763     // the refcount, so make adjustment here and below for symbols returned
 764     // that are not created or incremented due to a successful lookup.
 765     name->increment_refcount();
 766   } else {
 767     Klass* k = as_Klass(java_class);
 768     if (!k->oop_is_instance()) {
 769       name = k->name();
 770       name->increment_refcount();
 771     } else {
 772       ResourceMark rm;
 773       const char* sigstr = k->signature_name();
 774       int         siglen = (int) strlen(sigstr);
 775       if (!intern_if_not_found) {
 776         name = SymbolTable::probe(sigstr, siglen);
 777       } else {
 778         name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
 779       }
 780     }
 781   }
 782   return name;
 783 }
 784 
 785 // Returns the Java name for this Java mirror (Resource allocated)
 786 // See Klass::external_name().
 787 // For primitive type Java mirrors, its type name is returned.
 788 const char* java_lang_Class::as_external_name(oop java_class) {
 789   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 790   const char* name = NULL;
 791   if (is_primitive(java_class)) {
 792     name = type2name(primitive_type(java_class));
 793   } else {
 794     name = as_Klass(java_class)->external_name();
 795   }
 796   if (name == NULL) {
 797     name = "<null>";
 798   }
 799   return name;
 800 }
 801 
 802 Klass* java_lang_Class::array_klass(oop java_class) {
 803   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 804   assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
 805   return k;
 806 }
 807 
 808 
 809 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
 810   assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
 811   java_class->metadata_field_put(_array_klass_offset, klass);
 812 }
 813 
 814 
 815 bool java_lang_Class::is_primitive(oop java_class) {
 816   // should assert:
 817   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 818   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
 819 
 820 #ifdef ASSERT
 821   if (is_primitive) {
 822     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 823     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
 824         "Should be either the T_VOID primitive or a java primitive");
 825   }
 826 #endif
 827 
 828   return is_primitive;
 829 }
 830 
 831 
 832 BasicType java_lang_Class::primitive_type(oop java_class) {
 833   assert(java_lang_Class::is_primitive(java_class), "just checking");
 834   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
 835   BasicType type = T_VOID;
 836   if (ak != NULL) {
 837     // Note: create_basic_type_mirror above initializes ak to a non-null value.
 838     type = ArrayKlass::cast(ak)->element_type();
 839   } else {
 840     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
 841   }
 842   assert(Universe::java_mirror(type) == java_class, "must be consistent");
 843   return type;
 844 }
 845 
 846 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
 847   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 848   if (is_primitive(java_class)) {
 849     if (reference_klass != NULL)
 850       (*reference_klass) = NULL;
 851     return primitive_type(java_class);
 852   } else {
 853     if (reference_klass != NULL)
 854       (*reference_klass) = as_Klass(java_class);
 855     return T_OBJECT;
 856   }
 857 }
 858 
 859 
 860 oop java_lang_Class::primitive_mirror(BasicType t) {
 861   oop mirror = Universe::java_mirror(t);
 862   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
 863   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
 864   return mirror;
 865 }
 866 
 867 bool java_lang_Class::offsets_computed = false;
 868 int  java_lang_Class::classRedefinedCount_offset = -1;
 869 
 870 void java_lang_Class::compute_offsets() {
 871   assert(!offsets_computed, "offsets should be initialized only once");
 872   offsets_computed = true;
 873 
 874   Klass* klass_oop = SystemDictionary::Class_klass();
 875   // The classRedefinedCount field is only present starting in 1.5,
 876   // so don't go fatal.
 877   compute_optional_offset(classRedefinedCount_offset,
 878                           klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
 879 
 880   // Needs to be optional because the old build runs Queens during bootstrapping
 881   // and jdk8-9 doesn't have coordinated pushes yet.
 882   compute_optional_offset(_class_loader_offset,
 883                  klass_oop, vmSymbols::classLoader_name(),
 884                  vmSymbols::classloader_signature());
 885 
 886   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 887 }
 888 
 889 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
 890   if (!JDK_Version::is_gte_jdk15x_version()
 891       || classRedefinedCount_offset == -1) {
 892     // The classRedefinedCount field is only present starting in 1.5.
 893     // If we don't have an offset for it then just return -1 as a marker.
 894     return -1;
 895   }
 896 
 897   return the_class_mirror->int_field(classRedefinedCount_offset);
 898 }
 899 
 900 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
 901   if (!JDK_Version::is_gte_jdk15x_version()
 902       || classRedefinedCount_offset == -1) {
 903     // The classRedefinedCount field is only present starting in 1.5.
 904     // If we don't have an offset for it then nothing to set.
 905     return;
 906   }
 907 
 908   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
 909 }
 910 
 911 
 912 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
 913 //       platform thread structure, and a eetop offset which was used for thread
 914 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
 915 //       merged, so in the HotSpot VM we just use the eetop field for the thread
 916 //       instead of the privateInfo_offset.
 917 //
 918 // Note: The stackSize field is only present starting in 1.4.
 919 
 920 int java_lang_Thread::_name_offset = 0;
 921 int java_lang_Thread::_group_offset = 0;
 922 int java_lang_Thread::_contextClassLoader_offset = 0;
 923 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
 924 int java_lang_Thread::_priority_offset = 0;
 925 int java_lang_Thread::_eetop_offset = 0;
 926 int java_lang_Thread::_daemon_offset = 0;
 927 int java_lang_Thread::_stillborn_offset = 0;
 928 int java_lang_Thread::_stackSize_offset = 0;
 929 int java_lang_Thread::_tid_offset = 0;
 930 int java_lang_Thread::_thread_status_offset = 0;
 931 int java_lang_Thread::_park_blocker_offset = 0;
 932 int java_lang_Thread::_park_event_offset = 0 ;
 933 
 934 
 935 void java_lang_Thread::compute_offsets() {
 936   assert(_group_offset == 0, "offsets should be initialized only once");
 937 
 938   Klass* k = SystemDictionary::Thread_klass();
 939   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
 940   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
 941   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
 942   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
 943   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
 944   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
 945   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
 946   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
 947   // The stackSize field is only present starting in 1.4, so don't go fatal.
 948   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
 949   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
 950   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
 951   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
 952   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
 953   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
 954   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
 955  vmSymbols::long_signature());
 956 }
 957 
 958 
 959 JavaThread* java_lang_Thread::thread(oop java_thread) {
 960   return (JavaThread*)java_thread->address_field(_eetop_offset);
 961 }
 962 
 963 
 964 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
 965   java_thread->address_field_put(_eetop_offset, (address)thread);
 966 }
 967 
 968 
 969 oop java_lang_Thread::name(oop java_thread) {
 970   return java_thread->obj_field(_name_offset);
 971 }
 972 
 973 
 974 void java_lang_Thread::set_name(oop java_thread, oop name) {
 975   java_thread->obj_field_put(_name_offset, name);
 976 }
 977 
 978 
 979 ThreadPriority java_lang_Thread::priority(oop java_thread) {
 980   return (ThreadPriority)java_thread->int_field(_priority_offset);
 981 }
 982 
 983 
 984 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
 985   java_thread->int_field_put(_priority_offset, priority);
 986 }
 987 
 988 
 989 oop java_lang_Thread::threadGroup(oop java_thread) {
 990   return java_thread->obj_field(_group_offset);
 991 }
 992 
 993 
 994 bool java_lang_Thread::is_stillborn(oop java_thread) {
 995   return java_thread->bool_field(_stillborn_offset) != 0;
 996 }
 997 
 998 
 999 // We never have reason to turn the stillborn bit off
1000 void java_lang_Thread::set_stillborn(oop java_thread) {
1001   java_thread->bool_field_put(_stillborn_offset, true);
1002 }
1003 
1004 
1005 bool java_lang_Thread::is_alive(oop java_thread) {
1006   JavaThread* thr = java_lang_Thread::thread(java_thread);
1007   return (thr != NULL);
1008 }
1009 
1010 
1011 bool java_lang_Thread::is_daemon(oop java_thread) {
1012   return java_thread->bool_field(_daemon_offset) != 0;
1013 }
1014 
1015 
1016 void java_lang_Thread::set_daemon(oop java_thread) {
1017   java_thread->bool_field_put(_daemon_offset, true);
1018 }
1019 
1020 oop java_lang_Thread::context_class_loader(oop java_thread) {
1021   return java_thread->obj_field(_contextClassLoader_offset);
1022 }
1023 
1024 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1025   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1026 }
1027 
1028 
1029 jlong java_lang_Thread::stackSize(oop java_thread) {
1030   // The stackSize field is only present starting in 1.4
1031   if (_stackSize_offset > 0) {
1032     assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1033     return java_thread->long_field(_stackSize_offset);
1034   } else {
1035     return 0;
1036   }
1037 }
1038 
1039 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1040 void java_lang_Thread::set_thread_status(oop java_thread,
1041                                          java_lang_Thread::ThreadStatus status) {
1042   // The threadStatus is only present starting in 1.5
1043   if (_thread_status_offset > 0) {
1044     java_thread->int_field_put(_thread_status_offset, status);
1045   }
1046 }
1047 
1048 // Read thread status value from threadStatus field in java.lang.Thread java class.
1049 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1050   // Make sure the caller is operating on behalf of the VM or is
1051   // running VM code (state == _thread_in_vm).
1052   assert(Threads_lock->owned_by_self() || Thread::current()->is_Watcher_thread() ||
1053          Thread::current()->is_VM_thread() ||
1054          JavaThread::current()->thread_state() == _thread_in_vm,
1055          "Java Thread is not running in vm");
1056   // The threadStatus is only present starting in 1.5
1057   if (_thread_status_offset > 0) {
1058     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1059   } else {
1060     // All we can easily figure out is if it is alive, but that is
1061     // enough info for a valid unknown status.
1062     // These aren't restricted to valid set ThreadStatus values, so
1063     // use JVMTI values and cast.
1064     JavaThread* thr = java_lang_Thread::thread(java_thread);
1065     if (thr == NULL) {
1066       // the thread hasn't run yet or is in the process of exiting
1067       return NEW;
1068     }
1069     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1070   }
1071 }
1072 
1073 
1074 jlong java_lang_Thread::thread_id(oop java_thread) {
1075   // The thread ID field is only present starting in 1.5
1076   if (_tid_offset > 0) {
1077     return java_thread->long_field(_tid_offset);
1078   } else {
1079     return 0;
1080   }
1081 }
1082 
1083 oop java_lang_Thread::park_blocker(oop java_thread) {
1084   assert(JDK_Version::current().supports_thread_park_blocker() &&
1085          _park_blocker_offset != 0, "Must support parkBlocker field");
1086 
1087   if (_park_blocker_offset > 0) {
1088     return java_thread->obj_field(_park_blocker_offset);
1089   }
1090 
1091   return NULL;
1092 }
1093 
1094 jlong java_lang_Thread::park_event(oop java_thread) {
1095   if (_park_event_offset > 0) {
1096     return java_thread->long_field(_park_event_offset);
1097   }
1098   return 0;
1099 }
1100 
1101 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1102   if (_park_event_offset > 0) {
1103     java_thread->long_field_put(_park_event_offset, ptr);
1104     return true;
1105   }
1106   return false;
1107 }
1108 
1109 
1110 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1111   assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1112   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1113   switch (status) {
1114     case NEW                      : return "NEW";
1115     case RUNNABLE                 : return "RUNNABLE";
1116     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1117     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1118     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1119     case PARKED                   : return "WAITING (parking)";
1120     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1121     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1122     case TERMINATED               : return "TERMINATED";
1123     default                       : return "UNKNOWN";
1124   };
1125 }
1126 int java_lang_ThreadGroup::_parent_offset = 0;
1127 int java_lang_ThreadGroup::_name_offset = 0;
1128 int java_lang_ThreadGroup::_threads_offset = 0;
1129 int java_lang_ThreadGroup::_groups_offset = 0;
1130 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1131 int java_lang_ThreadGroup::_destroyed_offset = 0;
1132 int java_lang_ThreadGroup::_daemon_offset = 0;
1133 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1134 int java_lang_ThreadGroup::_nthreads_offset = 0;
1135 int java_lang_ThreadGroup::_ngroups_offset = 0;
1136 
1137 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1138   assert(java_thread_group->is_oop(), "thread group must be oop");
1139   return java_thread_group->obj_field(_parent_offset);
1140 }
1141 
1142 // ("name as oop" accessor is not necessary)
1143 
1144 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1145   oop name = java_thread_group->obj_field(_name_offset);
1146   // ThreadGroup.name can be null
1147   return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1148 }
1149 
1150 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1151   assert(java_thread_group->is_oop(), "thread group must be oop");
1152   return java_thread_group->int_field(_nthreads_offset);
1153 }
1154 
1155 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1156   oop threads = java_thread_group->obj_field(_threads_offset);
1157   assert(threads != NULL, "threadgroups should have threads");
1158   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1159   return objArrayOop(threads);
1160 }
1161 
1162 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1163   assert(java_thread_group->is_oop(), "thread group must be oop");
1164   return java_thread_group->int_field(_ngroups_offset);
1165 }
1166 
1167 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1168   oop groups = java_thread_group->obj_field(_groups_offset);
1169   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1170   return objArrayOop(groups);
1171 }
1172 
1173 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1174   assert(java_thread_group->is_oop(), "thread group must be oop");
1175   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1176 }
1177 
1178 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1179   assert(java_thread_group->is_oop(), "thread group must be oop");
1180   return java_thread_group->bool_field(_destroyed_offset) != 0;
1181 }
1182 
1183 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1184   assert(java_thread_group->is_oop(), "thread group must be oop");
1185   return java_thread_group->bool_field(_daemon_offset) != 0;
1186 }
1187 
1188 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1189   assert(java_thread_group->is_oop(), "thread group must be oop");
1190   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1191 }
1192 
1193 void java_lang_ThreadGroup::compute_offsets() {
1194   assert(_parent_offset == 0, "offsets should be initialized only once");
1195 
1196   Klass* k = SystemDictionary::ThreadGroup_klass();
1197 
1198   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1199   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1200   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1201   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1202   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1203   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1204   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1205   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1206   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1207   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1208 }
1209 
1210 oop java_lang_Throwable::unassigned_stacktrace() {
1211   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1212   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1213   if (UseCompressedOops) {
1214     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1215   } else {
1216     return oopDesc::load_decode_heap_oop((oop*)addr);
1217   }
1218 }
1219 
1220 oop java_lang_Throwable::backtrace(oop throwable) {
1221   return throwable->obj_field_acquire(backtrace_offset);
1222 }
1223 
1224 
1225 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1226   throwable->release_obj_field_put(backtrace_offset, value);
1227 }
1228 
1229 
1230 oop java_lang_Throwable::message(oop throwable) {
1231   return throwable->obj_field(detailMessage_offset);
1232 }
1233 
1234 
1235 oop java_lang_Throwable::message(Handle throwable) {
1236   return throwable->obj_field(detailMessage_offset);
1237 }
1238 
1239 
1240 void java_lang_Throwable::set_message(oop throwable, oop value) {
1241   throwable->obj_field_put(detailMessage_offset, value);
1242 }
1243 
1244 
1245 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1246   throwable->obj_field_put(stackTrace_offset, st_element_array);
1247 }
1248 
1249 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1250   assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1251   set_stacktrace(throwable, NULL);
1252 }
1253 
1254 
1255 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1256   ResourceMark rm;
1257   Klass* k = throwable->klass();
1258   assert(k != NULL, "just checking");
1259   st->print("%s", InstanceKlass::cast(k)->external_name());
1260   oop msg = message(throwable);
1261   if (msg != NULL) {
1262     st->print(": %s", java_lang_String::as_utf8_string(msg));
1263   }
1264 }
1265 
1266 
1267 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1268   ResourceMark rm;
1269   Klass* k = throwable->klass();
1270   assert(k != NULL, "just checking");
1271   st->print("%s", InstanceKlass::cast(k)->external_name());
1272   oop msg = message(throwable);
1273   if (msg != NULL) {
1274     st->print(": %s", java_lang_String::as_utf8_string(msg));
1275   }
1276 }
1277 
1278 // After this many redefines, the stack trace is unreliable.
1279 const int MAX_VERSION = USHRT_MAX;
1280 
1281 // Helper backtrace functions to store bci|version together.
1282 static inline int merge_bci_and_version(int bci, int version) {
1283   // only store u2 for version, checking for overflow.
1284   if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1285   assert((jushort)bci == bci, "bci should be short");
1286   return build_int_from_shorts(version, bci);
1287 }
1288 
1289 static inline int bci_at(unsigned int merged) {
1290   return extract_high_short_from_int(merged);
1291 }
1292 static inline int version_at(unsigned int merged) {
1293   return extract_low_short_from_int(merged);
1294 }
1295 
1296 static inline bool version_matches(Method* method, int version) {
1297   assert(version < MAX_VERSION, "version is too big");
1298   return method != NULL && (method->constants()->version() == version);
1299 }
1300 
1301 static inline int get_line_number(Method* method, int bci) {
1302   int line_number = 0;
1303   if (method->is_native()) {
1304     // Negative value different from -1 below, enabling Java code in
1305     // class java.lang.StackTraceElement to distinguish "native" from
1306     // "no LineNumberTable".  JDK tests for -2.
1307     line_number = -2;
1308   } else {
1309     // Returns -1 if no LineNumberTable, and otherwise actual line number
1310     line_number = method->line_number_from_bci(bci);
1311     if (line_number == -1 && ShowHiddenFrames) {
1312       line_number = bci + 1000000;
1313     }
1314   }
1315   return line_number;
1316 }
1317 
1318 // This class provides a simple wrapper over the internal structure of
1319 // exception backtrace to insulate users of the backtrace from needing
1320 // to know what it looks like.
1321 class BacktraceBuilder: public StackObj {
1322  private:
1323   Handle          _backtrace;
1324   objArrayOop     _head;
1325   typeArrayOop    _methods;
1326   typeArrayOop    _bcis;
1327   objArrayOop     _mirrors;
1328   typeArrayOop    _cprefs; // needed to insulate method name against redefinition
1329   int             _index;
1330   No_Safepoint_Verifier _nsv;
1331 
1332  public:
1333 
1334   enum {
1335     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1336     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1337     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1338     trace_cprefs_offset  = java_lang_Throwable::trace_cprefs_offset,
1339     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1340     trace_size           = java_lang_Throwable::trace_size,
1341     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1342   };
1343 
1344   // get info out of chunks
1345   static typeArrayOop get_methods(objArrayHandle chunk) {
1346     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1347     assert(methods != NULL, "method array should be initialized in backtrace");
1348     return methods;
1349   }
1350   static typeArrayOop get_bcis(objArrayHandle chunk) {
1351     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1352     assert(bcis != NULL, "bci array should be initialized in backtrace");
1353     return bcis;
1354   }
1355   static objArrayOop get_mirrors(objArrayHandle chunk) {
1356     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1357     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1358     return mirrors;
1359   }
1360   static typeArrayOop get_cprefs(objArrayHandle chunk) {
1361     typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1362     assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1363     return cprefs;
1364   }
1365 
1366   // constructor for new backtrace
1367   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1368     expand(CHECK);
1369     _backtrace = _head;
1370     _index = 0;
1371   }
1372 
1373   BacktraceBuilder(objArrayHandle backtrace) {
1374     _methods = get_methods(backtrace);
1375     _bcis = get_bcis(backtrace);
1376     _mirrors = get_mirrors(backtrace);
1377     _cprefs = get_cprefs(backtrace);
1378     assert(_methods->length() == _bcis->length() &&
1379            _methods->length() == _mirrors->length(),
1380            "method and source information arrays should match");
1381 
1382     // head is the preallocated backtrace
1383     _backtrace = _head = backtrace();
1384     _index = 0;
1385   }
1386 
1387   void expand(TRAPS) {
1388     objArrayHandle old_head(THREAD, _head);
1389     Pause_No_Safepoint_Verifier pnsv(&_nsv);
1390 
1391     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1392     objArrayHandle new_head(THREAD, head);
1393 
1394     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1395     typeArrayHandle new_methods(THREAD, methods);
1396 
1397     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1398     typeArrayHandle new_bcis(THREAD, bcis);
1399 
1400     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1401     objArrayHandle new_mirrors(THREAD, mirrors);
1402 
1403     typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1404     typeArrayHandle new_cprefs(THREAD, cprefs);
1405 
1406     if (!old_head.is_null()) {
1407       old_head->obj_at_put(trace_next_offset, new_head());
1408     }
1409     new_head->obj_at_put(trace_methods_offset, new_methods());
1410     new_head->obj_at_put(trace_bcis_offset, new_bcis());
1411     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1412     new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1413 
1414     _head    = new_head();
1415     _methods = new_methods();
1416     _bcis = new_bcis();
1417     _mirrors = new_mirrors();
1418     _cprefs  = new_cprefs();
1419     _index = 0;
1420   }
1421 
1422   oop backtrace() {
1423     return _backtrace();
1424   }
1425 
1426   inline void push(Method* method, int bci, TRAPS) {
1427     // Smear the -1 bci to 0 since the array only holds unsigned
1428     // shorts.  The later line number lookup would just smear the -1
1429     // to a 0 even if it could be recorded.
1430     if (bci == SynchronizationEntryBCI) bci = 0;
1431 
1432     if (_index >= trace_chunk_size) {
1433       methodHandle mhandle(THREAD, method);
1434       expand(CHECK);
1435       method = mhandle();
1436     }
1437 
1438     _methods->short_at_put(_index, method->orig_method_idnum());
1439     _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1440     _cprefs->short_at_put(_index, method->name_index());
1441 
1442     // We need to save the mirrors in the backtrace to keep the class
1443     // from being unloaded while we still have this stack trace.
1444     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1445     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1446     _index++;
1447   }
1448 
1449 };
1450 
1451 // Print stack trace element to resource allocated buffer
1452 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1453                                   int method_id, int version, int bci, int cpref) {
1454 
1455   // Get strings and string lengths
1456   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1457   const char* klass_name  = holder->external_name();
1458   int buf_len = (int)strlen(klass_name);
1459 
1460   Method* method = holder->method_with_orig_idnum(method_id, version);
1461 
1462   // The method can be NULL if the requested class version is gone
1463   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1464   char* method_name = sym->as_C_string();
1465   buf_len += (int)strlen(method_name);
1466 
1467   // Use a specific ik version as a holder since the mirror might
1468   // refer to a version that is now obsolete and no longer accessible
1469   // via the previous versions list.
1470   holder = holder->get_klass_version(version);
1471   char* source_file_name = NULL;
1472   if (holder != NULL) {
1473     Symbol* source = holder->source_file_name();
1474     if (source != NULL) {
1475       source_file_name = source->as_C_string();
1476       buf_len += (int)strlen(source_file_name);
1477     }
1478   }
1479 
1480   // Allocate temporary buffer with extra space for formatting and line number
1481   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1482 
1483   // Print stack trace line in buffer
1484   sprintf(buf, "\tat %s.%s", klass_name, method_name);
1485 
1486   if (!version_matches(method, version)) {
1487     strcat(buf, "(Redefined)");
1488   } else {
1489     int line_number = get_line_number(method, bci);
1490     if (line_number == -2) {
1491       strcat(buf, "(Native Method)");
1492     } else {
1493       if (source_file_name != NULL && (line_number != -1)) {
1494         // Sourcename and linenumber
1495         sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1496       } else if (source_file_name != NULL) {
1497         // Just sourcename
1498         sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1499       } else {
1500         // Neither sourcename nor linenumber
1501         sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1502       }
1503       nmethod* nm = method->code();
1504       if (WizardMode && nm != NULL) {
1505         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1506       }
1507     }
1508   }
1509 
1510   return buf;
1511 }
1512 
1513 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1514                                               int method_id, int version, int bci, int cpref) {
1515   ResourceMark rm;
1516   char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1517   st->print_cr("%s", buf);
1518 }
1519 
1520 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1521   Handle mirror = method->method_holder()->java_mirror();
1522   int method_id = method->orig_method_idnum();
1523   int version = method->constants()->version();
1524   int cpref = method->name_index();
1525   print_stack_element(st, mirror, method_id, version, bci, cpref);
1526 }
1527 
1528 const char* java_lang_Throwable::no_stack_trace_message() {
1529   return "\t<<no stack trace available>>";
1530 }
1531 
1532 
1533 // Currently used only for exceptions occurring during startup
1534 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1535   Thread *THREAD = Thread::current();
1536   Handle h_throwable(THREAD, throwable);
1537   while (h_throwable.not_null()) {
1538     objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1539     if (result.is_null()) {
1540       st->print_cr("%s", no_stack_trace_message());
1541       return;
1542     }
1543 
1544     while (result.not_null()) {
1545 
1546       // Get method id, bci, version and mirror from chunk
1547       typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1548       typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1549       objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1550       typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1551 
1552       int length = methods()->length();
1553       for (int index = 0; index < length; index++) {
1554         Handle mirror(THREAD, mirrors->obj_at(index));
1555         // NULL mirror means end of stack trace
1556         if (mirror.is_null()) goto handle_cause;
1557         int method = methods->short_at(index);
1558         int version = version_at(bcis->int_at(index));
1559         int bci = bci_at(bcis->int_at(index));
1560         int cpref = cprefs->short_at(index);
1561         print_stack_element(st, mirror, method, version, bci, cpref);
1562       }
1563       result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1564     }
1565   handle_cause:
1566     {
1567       EXCEPTION_MARK;
1568       JavaValue cause(T_OBJECT);
1569       JavaCalls::call_virtual(&cause,
1570                               h_throwable,
1571                               KlassHandle(THREAD, h_throwable->klass()),
1572                               vmSymbols::getCause_name(),
1573                               vmSymbols::void_throwable_signature(),
1574                               THREAD);
1575       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1576       if (HAS_PENDING_EXCEPTION) {
1577         CLEAR_PENDING_EXCEPTION;
1578         h_throwable = Handle();
1579       } else {
1580         h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1581         if (h_throwable.not_null()) {
1582           st->print("Caused by: ");
1583           print(h_throwable, st);
1584           st->cr();
1585         }
1586       }
1587     }
1588   }
1589 }
1590 
1591 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1592   if (!StackTraceInThrowable) return;
1593   ResourceMark rm(THREAD);
1594 
1595   // Start out by clearing the backtrace for this object, in case the VM
1596   // runs out of memory while allocating the stack trace
1597   set_backtrace(throwable(), NULL);
1598   if (JDK_Version::is_gte_jdk14x_version()) {
1599     // New since 1.4, clear lazily constructed Java level stacktrace if
1600     // refilling occurs
1601     // This is unnecessary in 1.7+ but harmless
1602     clear_stacktrace(throwable());
1603   }
1604 
1605   int max_depth = MaxJavaStackTraceDepth;
1606   JavaThread* thread = (JavaThread*)THREAD;
1607   BacktraceBuilder bt(CHECK);
1608 
1609   // If there is no Java frame just return the method that was being called
1610   // with bci 0
1611   if (!thread->has_last_Java_frame()) {
1612     if (max_depth >= 1 && method() != NULL) {
1613       bt.push(method(), 0, CHECK);
1614       set_backtrace(throwable(), bt.backtrace());
1615     }
1616     return;
1617   }
1618 
1619   // Instead of using vframe directly, this version of fill_in_stack_trace
1620   // basically handles everything by hand. This significantly improved the
1621   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1622   // See bug 6333838 for  more details.
1623   // The "ASSERT" here is to verify this method generates the exactly same stack
1624   // trace as utilizing vframe.
1625 #ifdef ASSERT
1626   vframeStream st(thread);
1627   methodHandle st_method(THREAD, st.method());
1628 #endif
1629   int total_count = 0;
1630   RegisterMap map(thread, false);
1631   int decode_offset = 0;
1632   nmethod* nm = NULL;
1633   bool skip_fillInStackTrace_check = false;
1634   bool skip_throwableInit_check = false;
1635   bool skip_hidden = !ShowHiddenFrames;
1636 
1637   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1638     Method* method = NULL;
1639     int bci = 0;
1640 
1641     // Compiled java method case.
1642     if (decode_offset != 0) {
1643       DebugInfoReadStream stream(nm, decode_offset);
1644       decode_offset = stream.read_int();
1645       method = (Method*)nm->metadata_at(stream.read_int());
1646       bci = stream.read_bci();
1647     } else {
1648       if (fr.is_first_frame()) break;
1649       address pc = fr.pc();
1650       if (fr.is_interpreted_frame()) {
1651         intptr_t bcx = fr.interpreter_frame_bcx();
1652         method = fr.interpreter_frame_method();
1653         bci =  fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1654         fr = fr.sender(&map);
1655       } else {
1656         CodeBlob* cb = fr.cb();
1657         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1658         // but non nmethod
1659         fr = fr.sender(&map);
1660         if (cb == NULL || !cb->is_nmethod()) {
1661           continue;
1662         }
1663         nm = (nmethod*)cb;
1664         if (nm->method()->is_native()) {
1665           method = nm->method();
1666           bci = 0;
1667         } else {
1668           PcDesc* pd = nm->pc_desc_at(pc);
1669           decode_offset = pd->scope_decode_offset();
1670           // if decode_offset is not equal to 0, it will execute the
1671           // "compiled java method case" at the beginning of the loop.
1672           continue;
1673         }
1674       }
1675     }
1676 #ifdef ASSERT
1677     assert(st_method() == method && st.bci() == bci,
1678            "Wrong stack trace");
1679     st.next();
1680     // vframeStream::method isn't GC-safe so store off a copy
1681     // of the Method* in case we GC.
1682     if (!st.at_end()) {
1683       st_method = st.method();
1684     }
1685 #endif
1686 
1687     // the format of the stacktrace will be:
1688     // - 1 or more fillInStackTrace frames for the exception class (skipped)
1689     // - 0 or more <init> methods for the exception class (skipped)
1690     // - rest of the stack
1691 
1692     if (!skip_fillInStackTrace_check) {
1693       if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1694            method->name() == vmSymbols::fillInStackTrace0_name()) &&
1695           throwable->is_a(method->method_holder())) {
1696         continue;
1697       }
1698       else {
1699         skip_fillInStackTrace_check = true; // gone past them all
1700       }
1701     }
1702     if (!skip_throwableInit_check) {
1703       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1704 
1705       // skip <init> methods of the exception class and superclasses
1706       // This is simlar to classic VM.
1707       if (method->name() == vmSymbols::object_initializer_name() &&
1708           throwable->is_a(method->method_holder())) {
1709         continue;
1710       } else {
1711         // there are none or we've seen them all - either way stop checking
1712         skip_throwableInit_check = true;
1713       }
1714     }
1715     if (method->is_hidden()) {
1716       if (skip_hidden)  continue;
1717     }
1718     bt.push(method, bci, CHECK);
1719     total_count++;
1720   }
1721 
1722   // Put completed stack trace into throwable object
1723   set_backtrace(throwable(), bt.backtrace());
1724 }
1725 
1726 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1727   // No-op if stack trace is disabled
1728   if (!StackTraceInThrowable) {
1729     return;
1730   }
1731 
1732   // Disable stack traces for some preallocated out of memory errors
1733   if (!Universe::should_fill_in_stack_trace(throwable)) {
1734     return;
1735   }
1736 
1737   PRESERVE_EXCEPTION_MARK;
1738 
1739   JavaThread* thread = JavaThread::active();
1740   fill_in_stack_trace(throwable, method, thread);
1741   // ignore exceptions thrown during stack trace filling
1742   CLEAR_PENDING_EXCEPTION;
1743 }
1744 
1745 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1746   // Allocate stack trace - backtrace is created but not filled in
1747 
1748   // No-op if stack trace is disabled
1749   if (!StackTraceInThrowable) return;
1750   BacktraceBuilder bt(CHECK);   // creates a backtrace
1751   set_backtrace(throwable(), bt.backtrace());
1752 }
1753 
1754 
1755 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1756   // Fill in stack trace into preallocated backtrace (no GC)
1757 
1758   // No-op if stack trace is disabled
1759   if (!StackTraceInThrowable) return;
1760 
1761   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1762 
1763   JavaThread* THREAD = JavaThread::current();
1764 
1765   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1766   assert(backtrace.not_null(), "backtrace should have been preallocated");
1767 
1768   ResourceMark rm(THREAD);
1769   vframeStream st(THREAD);
1770 
1771   BacktraceBuilder bt(backtrace);
1772 
1773   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1774   // methods as preallocated errors aren't created by "java" code.
1775 
1776   // fill in as much stack trace as possible
1777   typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1778   int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1779   int chunk_count = 0;
1780 
1781   for (;!st.at_end(); st.next()) {
1782     bt.push(st.method(), st.bci(), CHECK);
1783     chunk_count++;
1784 
1785     // Bail-out for deep stacks
1786     if (chunk_count >= max_chunks) break;
1787   }
1788 
1789   // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1790   // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1791   // can be removed in a JDK using this JVM version
1792   if (JDK_Version::is_gte_jdk17x_version()) {
1793       java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1794       assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1795   }
1796 }
1797 
1798 
1799 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1800   if (throwable == NULL) {
1801     THROW_0(vmSymbols::java_lang_NullPointerException());
1802   }
1803   objArrayOop chunk = objArrayOop(backtrace(throwable));
1804   int depth = 0;
1805   if (chunk != NULL) {
1806     // Iterate over chunks and count full ones
1807     while (true) {
1808       objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1809       if (next == NULL) break;
1810       depth += trace_chunk_size;
1811       chunk = next;
1812     }
1813     assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1814     // Count element in remaining partial chunk.  NULL value for mirror
1815     // marks the end of the stack trace elements that are saved.
1816     objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1817     assert(mirrors != NULL, "sanity check");
1818     for (int i = 0; i < mirrors->length(); i++) {
1819       if (mirrors->obj_at(i) == NULL) break;
1820       depth++;
1821     }
1822   }
1823   return depth;
1824 }
1825 
1826 
1827 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1828   if (throwable == NULL) {
1829     THROW_0(vmSymbols::java_lang_NullPointerException());
1830   }
1831   if (index < 0) {
1832     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1833   }
1834   // Compute how many chunks to skip and index into actual chunk
1835   objArrayOop chunk = objArrayOop(backtrace(throwable));
1836   int skip_chunks = index / trace_chunk_size;
1837   int chunk_index = index % trace_chunk_size;
1838   while (chunk != NULL && skip_chunks > 0) {
1839     chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1840         skip_chunks--;
1841   }
1842   if (chunk == NULL) {
1843     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1844   }
1845   // Get method id, bci, version, mirror and cpref from chunk
1846   typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1847   typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1848   objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1849   typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1850 
1851   assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1852 
1853   int method = methods->short_at(chunk_index);
1854   int version = version_at(bcis->int_at(chunk_index));
1855   int bci = bci_at(bcis->int_at(chunk_index));
1856   int cpref = cprefs->short_at(chunk_index);
1857   Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1858 
1859   // Chunk can be partial full
1860   if (mirror.is_null()) {
1861     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1862   }
1863   oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1864   return element;
1865 }
1866 
1867 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1868                                         int version, int bci, int cpref, TRAPS) {
1869   // Allocate java.lang.StackTraceElement instance
1870   Klass* k = SystemDictionary::StackTraceElement_klass();
1871   assert(k != NULL, "must be loaded in 1.4+");
1872   instanceKlassHandle ik (THREAD, k);
1873   if (ik->should_be_initialized()) {
1874     ik->initialize(CHECK_0);
1875   }
1876 
1877   Handle element = ik->allocate_instance_handle(CHECK_0);
1878   // Fill in class name
1879   ResourceMark rm(THREAD);
1880   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1881   const char* str = holder->external_name();
1882   oop classname = StringTable::intern((char*) str, CHECK_0);
1883   java_lang_StackTraceElement::set_declaringClass(element(), classname);
1884 
1885   Method* method = holder->method_with_orig_idnum(method_id, version);
1886 
1887   // The method can be NULL if the requested class version is gone
1888   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1889 
1890   // Fill in method name
1891   oop methodname = StringTable::intern(sym, CHECK_0);
1892   java_lang_StackTraceElement::set_methodName(element(), methodname);
1893 
1894   if (!version_matches(method, version)) {
1895     // The method was redefined, accurate line number information isn't available
1896     java_lang_StackTraceElement::set_fileName(element(), NULL);
1897     java_lang_StackTraceElement::set_lineNumber(element(), -1);
1898   } else {
1899     // Fill in source file name and line number.
1900     // Use a specific ik version as a holder since the mirror might
1901     // refer to a version that is now obsolete and no longer accessible
1902     // via the previous versions list.
1903     holder = holder->get_klass_version(version);
1904     assert(holder != NULL, "sanity check");
1905     Symbol* source = holder->source_file_name();
1906     if (ShowHiddenFrames && source == NULL)
1907       source = vmSymbols::unknown_class_name();
1908     oop filename = StringTable::intern(source, CHECK_0);
1909     java_lang_StackTraceElement::set_fileName(element(), filename);
1910 
1911     int line_number = get_line_number(method, bci);
1912     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1913   }
1914   return element();
1915 }
1916 
1917 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1918   Handle mirror (THREAD, method->method_holder()->java_mirror());
1919   int method_id = method->orig_method_idnum();
1920   int cpref = method->name_index();
1921   return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1922 }
1923 
1924 void java_lang_reflect_AccessibleObject::compute_offsets() {
1925   Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1926   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1927 }
1928 
1929 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1930   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931   return (jboolean) reflect->bool_field(override_offset);
1932 }
1933 
1934 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1935   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936   reflect->bool_field_put(override_offset, (int) value);
1937 }
1938 
1939 void java_lang_reflect_Method::compute_offsets() {
1940   Klass* k = SystemDictionary::reflect_Method_klass();
1941   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
1942   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
1943   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
1944   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1945   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1946   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
1947   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
1948   // The generic signature and annotations fields are only present in 1.5
1949   signature_offset = -1;
1950   annotations_offset = -1;
1951   parameter_annotations_offset = -1;
1952   annotation_default_offset = -1;
1953   type_annotations_offset = -1;
1954   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
1955   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
1956   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1957   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
1958   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
1959 }
1960 
1961 Handle java_lang_reflect_Method::create(TRAPS) {
1962   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1963   Klass* klass = SystemDictionary::reflect_Method_klass();
1964   // This class is eagerly initialized during VM initialization, since we keep a refence
1965   // to one of the methods
1966   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1967   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1968 }
1969 
1970 oop java_lang_reflect_Method::clazz(oop reflect) {
1971   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1972   return reflect->obj_field(clazz_offset);
1973 }
1974 
1975 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1976   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1977    reflect->obj_field_put(clazz_offset, value);
1978 }
1979 
1980 int java_lang_reflect_Method::slot(oop reflect) {
1981   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982   return reflect->int_field(slot_offset);
1983 }
1984 
1985 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1986   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1987   reflect->int_field_put(slot_offset, value);
1988 }
1989 
1990 oop java_lang_reflect_Method::name(oop method) {
1991   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992   return method->obj_field(name_offset);
1993 }
1994 
1995 void java_lang_reflect_Method::set_name(oop method, oop value) {
1996   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1997   method->obj_field_put(name_offset, value);
1998 }
1999 
2000 oop java_lang_reflect_Method::return_type(oop method) {
2001   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2002   return method->obj_field(returnType_offset);
2003 }
2004 
2005 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2006   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2007   method->obj_field_put(returnType_offset, value);
2008 }
2009 
2010 oop java_lang_reflect_Method::parameter_types(oop method) {
2011   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2012   return method->obj_field(parameterTypes_offset);
2013 }
2014 
2015 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2016   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2017   method->obj_field_put(parameterTypes_offset, value);
2018 }
2019 
2020 oop java_lang_reflect_Method::exception_types(oop method) {
2021   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2022   return method->obj_field(exceptionTypes_offset);
2023 }
2024 
2025 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2026   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2027   method->obj_field_put(exceptionTypes_offset, value);
2028 }
2029 
2030 int java_lang_reflect_Method::modifiers(oop method) {
2031   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2032   return method->int_field(modifiers_offset);
2033 }
2034 
2035 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2036   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2037   method->int_field_put(modifiers_offset, value);
2038 }
2039 
2040 bool java_lang_reflect_Method::has_signature_field() {
2041   return (signature_offset >= 0);
2042 }
2043 
2044 oop java_lang_reflect_Method::signature(oop method) {
2045   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2046   assert(has_signature_field(), "signature field must be present");
2047   return method->obj_field(signature_offset);
2048 }
2049 
2050 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2051   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2052   assert(has_signature_field(), "signature field must be present");
2053   method->obj_field_put(signature_offset, value);
2054 }
2055 
2056 bool java_lang_reflect_Method::has_annotations_field() {
2057   return (annotations_offset >= 0);
2058 }
2059 
2060 oop java_lang_reflect_Method::annotations(oop method) {
2061   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2062   assert(has_annotations_field(), "annotations field must be present");
2063   return method->obj_field(annotations_offset);
2064 }
2065 
2066 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2067   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2068   assert(has_annotations_field(), "annotations field must be present");
2069   method->obj_field_put(annotations_offset, value);
2070 }
2071 
2072 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2073   return (parameter_annotations_offset >= 0);
2074 }
2075 
2076 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2077   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2078   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2079   return method->obj_field(parameter_annotations_offset);
2080 }
2081 
2082 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2083   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2084   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2085   method->obj_field_put(parameter_annotations_offset, value);
2086 }
2087 
2088 bool java_lang_reflect_Method::has_annotation_default_field() {
2089   return (annotation_default_offset >= 0);
2090 }
2091 
2092 oop java_lang_reflect_Method::annotation_default(oop method) {
2093   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2094   assert(has_annotation_default_field(), "annotation default field must be present");
2095   return method->obj_field(annotation_default_offset);
2096 }
2097 
2098 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2099   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2100   assert(has_annotation_default_field(), "annotation default field must be present");
2101   method->obj_field_put(annotation_default_offset, value);
2102 }
2103 
2104 bool java_lang_reflect_Method::has_type_annotations_field() {
2105   return (type_annotations_offset >= 0);
2106 }
2107 
2108 oop java_lang_reflect_Method::type_annotations(oop method) {
2109   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2110   assert(has_type_annotations_field(), "type_annotations field must be present");
2111   return method->obj_field(type_annotations_offset);
2112 }
2113 
2114 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2115   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2116   assert(has_type_annotations_field(), "type_annotations field must be present");
2117   method->obj_field_put(type_annotations_offset, value);
2118 }
2119 
2120 void java_lang_reflect_Constructor::compute_offsets() {
2121   Klass* k = SystemDictionary::reflect_Constructor_klass();
2122   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2123   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2124   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2125   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2126   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2127   // The generic signature and annotations fields are only present in 1.5
2128   signature_offset = -1;
2129   annotations_offset = -1;
2130   parameter_annotations_offset = -1;
2131   type_annotations_offset = -1;
2132   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2133   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2134   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2135   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2136 }
2137 
2138 Handle java_lang_reflect_Constructor::create(TRAPS) {
2139   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2141   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2142   instanceKlassHandle klass (THREAD, k);
2143   // Ensure it is initialized
2144   klass->initialize(CHECK_NH);
2145   return klass->allocate_instance_handle(CHECK_NH);
2146 }
2147 
2148 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2149   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2150   return reflect->obj_field(clazz_offset);
2151 }
2152 
2153 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2154   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2155    reflect->obj_field_put(clazz_offset, value);
2156 }
2157 
2158 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2159   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2160   return constructor->obj_field(parameterTypes_offset);
2161 }
2162 
2163 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2164   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2165   constructor->obj_field_put(parameterTypes_offset, value);
2166 }
2167 
2168 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2169   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2170   return constructor->obj_field(exceptionTypes_offset);
2171 }
2172 
2173 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2174   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2175   constructor->obj_field_put(exceptionTypes_offset, value);
2176 }
2177 
2178 int java_lang_reflect_Constructor::slot(oop reflect) {
2179   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2180   return reflect->int_field(slot_offset);
2181 }
2182 
2183 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2184   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2185   reflect->int_field_put(slot_offset, value);
2186 }
2187 
2188 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2189   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2190   return constructor->int_field(modifiers_offset);
2191 }
2192 
2193 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2194   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2195   constructor->int_field_put(modifiers_offset, value);
2196 }
2197 
2198 bool java_lang_reflect_Constructor::has_signature_field() {
2199   return (signature_offset >= 0);
2200 }
2201 
2202 oop java_lang_reflect_Constructor::signature(oop constructor) {
2203   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2204   assert(has_signature_field(), "signature field must be present");
2205   return constructor->obj_field(signature_offset);
2206 }
2207 
2208 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2209   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2210   assert(has_signature_field(), "signature field must be present");
2211   constructor->obj_field_put(signature_offset, value);
2212 }
2213 
2214 bool java_lang_reflect_Constructor::has_annotations_field() {
2215   return (annotations_offset >= 0);
2216 }
2217 
2218 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2219   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2220   assert(has_annotations_field(), "annotations field must be present");
2221   return constructor->obj_field(annotations_offset);
2222 }
2223 
2224 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2225   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2226   assert(has_annotations_field(), "annotations field must be present");
2227   constructor->obj_field_put(annotations_offset, value);
2228 }
2229 
2230 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2231   return (parameter_annotations_offset >= 0);
2232 }
2233 
2234 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2235   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2236   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2237   return method->obj_field(parameter_annotations_offset);
2238 }
2239 
2240 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2241   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2242   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2243   method->obj_field_put(parameter_annotations_offset, value);
2244 }
2245 
2246 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2247   return (type_annotations_offset >= 0);
2248 }
2249 
2250 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2251   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2252   assert(has_type_annotations_field(), "type_annotations field must be present");
2253   return constructor->obj_field(type_annotations_offset);
2254 }
2255 
2256 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2257   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258   assert(has_type_annotations_field(), "type_annotations field must be present");
2259   constructor->obj_field_put(type_annotations_offset, value);
2260 }
2261 
2262 void java_lang_reflect_Field::compute_offsets() {
2263   Klass* k = SystemDictionary::reflect_Field_klass();
2264   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2265   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
2266   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
2267   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
2268   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2269   // The generic signature and annotations fields are only present in 1.5
2270   signature_offset = -1;
2271   annotations_offset = -1;
2272   type_annotations_offset = -1;
2273   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2274   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
2275   compute_optional_offset(type_annotations_offset,  k, vmSymbols::type_annotations_name(),  vmSymbols::byte_array_signature());
2276 }
2277 
2278 Handle java_lang_reflect_Field::create(TRAPS) {
2279   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280   Symbol* name = vmSymbols::java_lang_reflect_Field();
2281   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2282   instanceKlassHandle klass (THREAD, k);
2283   // Ensure it is initialized
2284   klass->initialize(CHECK_NH);
2285   return klass->allocate_instance_handle(CHECK_NH);
2286 }
2287 
2288 oop java_lang_reflect_Field::clazz(oop reflect) {
2289   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2290   return reflect->obj_field(clazz_offset);
2291 }
2292 
2293 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2294   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2295    reflect->obj_field_put(clazz_offset, value);
2296 }
2297 
2298 oop java_lang_reflect_Field::name(oop field) {
2299   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2300   return field->obj_field(name_offset);
2301 }
2302 
2303 void java_lang_reflect_Field::set_name(oop field, oop value) {
2304   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2305   field->obj_field_put(name_offset, value);
2306 }
2307 
2308 oop java_lang_reflect_Field::type(oop field) {
2309   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2310   return field->obj_field(type_offset);
2311 }
2312 
2313 void java_lang_reflect_Field::set_type(oop field, oop value) {
2314   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2315   field->obj_field_put(type_offset, value);
2316 }
2317 
2318 int java_lang_reflect_Field::slot(oop reflect) {
2319   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2320   return reflect->int_field(slot_offset);
2321 }
2322 
2323 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2324   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325   reflect->int_field_put(slot_offset, value);
2326 }
2327 
2328 int java_lang_reflect_Field::modifiers(oop field) {
2329   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2330   return field->int_field(modifiers_offset);
2331 }
2332 
2333 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2334   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2335   field->int_field_put(modifiers_offset, value);
2336 }
2337 
2338 bool java_lang_reflect_Field::has_signature_field() {
2339   return (signature_offset >= 0);
2340 }
2341 
2342 oop java_lang_reflect_Field::signature(oop field) {
2343   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2344   assert(has_signature_field(), "signature field must be present");
2345   return field->obj_field(signature_offset);
2346 }
2347 
2348 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2349   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2350   assert(has_signature_field(), "signature field must be present");
2351   field->obj_field_put(signature_offset, value);
2352 }
2353 
2354 bool java_lang_reflect_Field::has_annotations_field() {
2355   return (annotations_offset >= 0);
2356 }
2357 
2358 oop java_lang_reflect_Field::annotations(oop field) {
2359   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2360   assert(has_annotations_field(), "annotations field must be present");
2361   return field->obj_field(annotations_offset);
2362 }
2363 
2364 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2365   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366   assert(has_annotations_field(), "annotations field must be present");
2367   field->obj_field_put(annotations_offset, value);
2368 }
2369 
2370 bool java_lang_reflect_Field::has_type_annotations_field() {
2371   return (type_annotations_offset >= 0);
2372 }
2373 
2374 oop java_lang_reflect_Field::type_annotations(oop field) {
2375   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2376   assert(has_type_annotations_field(), "type_annotations field must be present");
2377   return field->obj_field(type_annotations_offset);
2378 }
2379 
2380 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2381   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2382   assert(has_type_annotations_field(), "type_annotations field must be present");
2383   field->obj_field_put(type_annotations_offset, value);
2384 }
2385 
2386 void sun_reflect_ConstantPool::compute_offsets() {
2387   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2388   // This null test can be removed post beta
2389   if (k != NULL) {
2390     // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2391     compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2392   }
2393 }
2394 
2395 void java_lang_reflect_Parameter::compute_offsets() {
2396   Klass* k = SystemDictionary::reflect_Parameter_klass();
2397   if(NULL != k) {
2398     compute_offset(name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
2399     compute_offset(modifiers_offset,   k, vmSymbols::modifiers_name(),   vmSymbols::int_signature());
2400     compute_offset(index_offset,       k, vmSymbols::index_name(),       vmSymbols::int_signature());
2401     compute_offset(executable_offset,  k, vmSymbols::executable_name(),  vmSymbols::executable_signature());
2402   }
2403 }
2404 
2405 Handle java_lang_reflect_Parameter::create(TRAPS) {
2406   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2407   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2408   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2409   instanceKlassHandle klass (THREAD, k);
2410   // Ensure it is initialized
2411   klass->initialize(CHECK_NH);
2412   return klass->allocate_instance_handle(CHECK_NH);
2413 }
2414 
2415 oop java_lang_reflect_Parameter::name(oop param) {
2416   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2417   return param->obj_field(name_offset);
2418 }
2419 
2420 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2421   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2422   param->obj_field_put(name_offset, value);
2423 }
2424 
2425 int java_lang_reflect_Parameter::modifiers(oop param) {
2426   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2427   return param->int_field(modifiers_offset);
2428 }
2429 
2430 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2431   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2432   param->int_field_put(modifiers_offset, value);
2433 }
2434 
2435 int java_lang_reflect_Parameter::index(oop param) {
2436   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2437   return param->int_field(index_offset);
2438 }
2439 
2440 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2441   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2442   param->int_field_put(index_offset, value);
2443 }
2444 
2445 oop java_lang_reflect_Parameter::executable(oop param) {
2446   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2447   return param->obj_field(executable_offset);
2448 }
2449 
2450 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2451   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2452   param->obj_field_put(executable_offset, value);
2453 }
2454 
2455 
2456 Handle sun_reflect_ConstantPool::create(TRAPS) {
2457   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2458   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2459   instanceKlassHandle klass (THREAD, k);
2460   // Ensure it is initialized
2461   klass->initialize(CHECK_NH);
2462   return klass->allocate_instance_handle(CHECK_NH);
2463 }
2464 
2465 
2466 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2467   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2468   oop mirror = value->pool_holder()->java_mirror();
2469   // Save the mirror to get back the constant pool.
2470   reflect->obj_field_put(_oop_offset, mirror);
2471 }
2472 
2473 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2474   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2475 
2476   oop mirror = reflect->obj_field(_oop_offset);
2477   Klass* k = java_lang_Class::as_Klass(mirror);
2478   assert(k->oop_is_instance(), "Must be");
2479 
2480   // Get the constant pool back from the klass.  Since class redefinition
2481   // merges the new constant pool into the old, this is essentially the
2482   // same constant pool as the original.  If constant pool merging is
2483   // no longer done in the future, this will have to change to save
2484   // the original.
2485   return InstanceKlass::cast(k)->constants();
2486 }
2487 
2488 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2489   Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2490   // This null test can be removed post beta
2491   if (k != NULL) {
2492     compute_offset(_base_offset, k,
2493                    vmSymbols::base_name(), vmSymbols::object_signature());
2494   }
2495 }
2496 
2497 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2498   Klass* k = SystemDictionary::box_klass(type);
2499   if (k == NULL)  return NULL;
2500   instanceKlassHandle h (THREAD, k);
2501   if (!h->is_initialized())  h->initialize(CHECK_0);
2502   return h->allocate_instance(THREAD);
2503 }
2504 
2505 
2506 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2507   oop box = initialize_and_allocate(type, CHECK_0);
2508   if (box == NULL)  return NULL;
2509   switch (type) {
2510     case T_BOOLEAN:
2511       box->bool_field_put(value_offset, value->z);
2512       break;
2513     case T_CHAR:
2514       box->char_field_put(value_offset, value->c);
2515       break;
2516     case T_FLOAT:
2517       box->float_field_put(value_offset, value->f);
2518       break;
2519     case T_DOUBLE:
2520       box->double_field_put(long_value_offset, value->d);
2521       break;
2522     case T_BYTE:
2523       box->byte_field_put(value_offset, value->b);
2524       break;
2525     case T_SHORT:
2526       box->short_field_put(value_offset, value->s);
2527       break;
2528     case T_INT:
2529       box->int_field_put(value_offset, value->i);
2530       break;
2531     case T_LONG:
2532       box->long_field_put(long_value_offset, value->j);
2533       break;
2534     default:
2535       return NULL;
2536   }
2537   return box;
2538 }
2539 
2540 
2541 BasicType java_lang_boxing_object::basic_type(oop box) {
2542   if (box == NULL)  return T_ILLEGAL;
2543   BasicType type = SystemDictionary::box_klass_type(box->klass());
2544   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
2545     return T_ILLEGAL;
2546   return type;
2547 }
2548 
2549 
2550 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2551   BasicType type = SystemDictionary::box_klass_type(box->klass());
2552   switch (type) {
2553   case T_BOOLEAN:
2554     value->z = box->bool_field(value_offset);
2555     break;
2556   case T_CHAR:
2557     value->c = box->char_field(value_offset);
2558     break;
2559   case T_FLOAT:
2560     value->f = box->float_field(value_offset);
2561     break;
2562   case T_DOUBLE:
2563     value->d = box->double_field(long_value_offset);
2564     break;
2565   case T_BYTE:
2566     value->b = box->byte_field(value_offset);
2567     break;
2568   case T_SHORT:
2569     value->s = box->short_field(value_offset);
2570     break;
2571   case T_INT:
2572     value->i = box->int_field(value_offset);
2573     break;
2574   case T_LONG:
2575     value->j = box->long_field(long_value_offset);
2576     break;
2577   default:
2578     return T_ILLEGAL;
2579   } // end switch
2580   return type;
2581 }
2582 
2583 
2584 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2585   BasicType type = SystemDictionary::box_klass_type(box->klass());
2586   switch (type) {
2587   case T_BOOLEAN:
2588     box->bool_field_put(value_offset, value->z);
2589     break;
2590   case T_CHAR:
2591     box->char_field_put(value_offset, value->c);
2592     break;
2593   case T_FLOAT:
2594     box->float_field_put(value_offset, value->f);
2595     break;
2596   case T_DOUBLE:
2597     box->double_field_put(long_value_offset, value->d);
2598     break;
2599   case T_BYTE:
2600     box->byte_field_put(value_offset, value->b);
2601     break;
2602   case T_SHORT:
2603     box->short_field_put(value_offset, value->s);
2604     break;
2605   case T_INT:
2606     box->int_field_put(value_offset, value->i);
2607     break;
2608   case T_LONG:
2609     box->long_field_put(long_value_offset, value->j);
2610     break;
2611   default:
2612     return T_ILLEGAL;
2613   } // end switch
2614   return type;
2615 }
2616 
2617 
2618 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2619   switch (type) {
2620   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
2621   case T_CHAR:      st->print("%d", value->c);                      break;
2622   case T_BYTE:      st->print("%d", value->b);                      break;
2623   case T_SHORT:     st->print("%d", value->s);                      break;
2624   case T_INT:       st->print("%d", value->i);                      break;
2625   case T_LONG:      st->print(INT64_FORMAT, value->j);              break;
2626   case T_FLOAT:     st->print("%f", value->f);                      break;
2627   case T_DOUBLE:    st->print("%lf", value->d);                     break;
2628   default:          st->print("type %d?", type);                    break;
2629   }
2630 }
2631 
2632 
2633 // Support for java_lang_ref_Reference
2634 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2635   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2636   address addr = ik->static_field_addr(static_lock_offset);
2637   return (HeapWord*) addr;
2638 }
2639 
2640 oop java_lang_ref_Reference::pending_list_lock() {
2641   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2642   address addr = ik->static_field_addr(static_lock_offset);
2643   if (UseCompressedOops) {
2644     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2645   } else {
2646     return oopDesc::load_decode_heap_oop((oop*)addr);
2647   }
2648 }
2649 
2650 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2651   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2652   address addr = ik->static_field_addr(static_pending_offset);
2653   // XXX This might not be HeapWord aligned, almost rather be char *.
2654   return (HeapWord*)addr;
2655 }
2656 
2657 oop java_lang_ref_Reference::pending_list() {
2658   char *addr = (char *)pending_list_addr();
2659   if (UseCompressedOops) {
2660     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2661   } else {
2662     return oopDesc::load_decode_heap_oop((oop*)addr);
2663   }
2664 }
2665 
2666 
2667 // Support for java_lang_ref_SoftReference
2668 
2669 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2670   return ref->long_field(timestamp_offset);
2671 }
2672 
2673 jlong java_lang_ref_SoftReference::clock() {
2674   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2675   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2676   return *offset;
2677 }
2678 
2679 void java_lang_ref_SoftReference::set_clock(jlong value) {
2680   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2681   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2682   *offset = value;
2683 }
2684 
2685 // Support for java_lang_ref_ReferenceQueue
2686 
2687 oop java_lang_ref_ReferenceQueue::NULL_queue() {
2688   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2689   oop mirror = ik->java_mirror();
2690   return mirror->obj_field(static_NULL_queue_offset);
2691 }
2692 
2693 oop java_lang_ref_ReferenceQueue::ENQUEUED_queue() {
2694   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2695   oop mirror = ik->java_mirror();
2696   return mirror->obj_field(static_ENQUEUED_queue_offset);
2697 }
2698 
2699 void java_lang_ref_ReferenceQueue::compute_offsets() {
2700   Klass* k = SystemDictionary::ReferenceQueue_klass();
2701   compute_offset(static_NULL_queue_offset,
2702                  k,
2703                  vmSymbols::referencequeue_null_name(),
2704                  vmSymbols::referencequeue_signature());
2705   compute_offset(static_ENQUEUED_queue_offset,
2706                  k,
2707                  vmSymbols::referencequeue_enqueued_name(),
2708                  vmSymbols::referencequeue_signature());
2709 }
2710 
2711 // Support for java_lang_invoke_DirectMethodHandle
2712 
2713 int java_lang_invoke_DirectMethodHandle::_member_offset;
2714 
2715 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2716   oop member_name = NULL;
2717   bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2718   assert(is_dmh, "a DirectMethodHandle oop is expected");
2719   if (is_dmh) {
2720     member_name = dmh->obj_field(member_offset_in_bytes());
2721   }
2722   return member_name;
2723 }
2724 
2725 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2726   Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2727   if (klass_oop != NULL && EnableInvokeDynamic) {
2728     compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2729   }
2730 }
2731 
2732 // Support for java_lang_invoke_MethodHandle
2733 
2734 int java_lang_invoke_MethodHandle::_type_offset;
2735 int java_lang_invoke_MethodHandle::_form_offset;
2736 
2737 int java_lang_invoke_MemberName::_clazz_offset;
2738 int java_lang_invoke_MemberName::_name_offset;
2739 int java_lang_invoke_MemberName::_type_offset;
2740 int java_lang_invoke_MemberName::_flags_offset;
2741 int java_lang_invoke_MemberName::_vmtarget_offset;
2742 int java_lang_invoke_MemberName::_vmloader_offset;
2743 int java_lang_invoke_MemberName::_vmindex_offset;
2744 
2745 int java_lang_invoke_LambdaForm::_vmentry_offset;
2746 
2747 void java_lang_invoke_MethodHandle::compute_offsets() {
2748   Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2749   if (klass_oop != NULL && EnableInvokeDynamic) {
2750     compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2751     compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2752     if (_form_offset == 0) {
2753       EnableInvokeDynamic = false;
2754     }
2755   }
2756 }
2757 
2758 void java_lang_invoke_MemberName::compute_offsets() {
2759   Klass* klass_oop = SystemDictionary::MemberName_klass();
2760   if (klass_oop != NULL && EnableInvokeDynamic) {
2761     compute_offset(_clazz_offset,     klass_oop, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2762     compute_offset(_name_offset,      klass_oop, vmSymbols::name_name(),      vmSymbols::string_signature());
2763     compute_offset(_type_offset,      klass_oop, vmSymbols::type_name(),      vmSymbols::object_signature());
2764     compute_offset(_flags_offset,     klass_oop, vmSymbols::flags_name(),     vmSymbols::int_signature());
2765     MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2766   }
2767 }
2768 
2769 void java_lang_invoke_LambdaForm::compute_offsets() {
2770   Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2771   if (klass_oop != NULL && EnableInvokeDynamic) {
2772     compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2773   }
2774 }
2775 
2776 oop java_lang_invoke_MethodHandle::type(oop mh) {
2777   return mh->obj_field(_type_offset);
2778 }
2779 
2780 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2781   mh->obj_field_put(_type_offset, mtype);
2782 }
2783 
2784 oop java_lang_invoke_MethodHandle::form(oop mh) {
2785   assert(_form_offset != 0, "");
2786   return mh->obj_field(_form_offset);
2787 }
2788 
2789 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2790   assert(_form_offset != 0, "");
2791   mh->obj_field_put(_form_offset, lform);
2792 }
2793 
2794 /// MemberName accessors
2795 
2796 oop java_lang_invoke_MemberName::clazz(oop mname) {
2797   assert(is_instance(mname), "wrong type");
2798   return mname->obj_field(_clazz_offset);
2799 }
2800 
2801 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2802   assert(is_instance(mname), "wrong type");
2803   mname->obj_field_put(_clazz_offset, clazz);
2804 }
2805 
2806 oop java_lang_invoke_MemberName::name(oop mname) {
2807   assert(is_instance(mname), "wrong type");
2808   return mname->obj_field(_name_offset);
2809 }
2810 
2811 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2812   assert(is_instance(mname), "wrong type");
2813   mname->obj_field_put(_name_offset, name);
2814 }
2815 
2816 oop java_lang_invoke_MemberName::type(oop mname) {
2817   assert(is_instance(mname), "wrong type");
2818   return mname->obj_field(_type_offset);
2819 }
2820 
2821 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2822   assert(is_instance(mname), "wrong type");
2823   mname->obj_field_put(_type_offset, type);
2824 }
2825 
2826 int java_lang_invoke_MemberName::flags(oop mname) {
2827   assert(is_instance(mname), "wrong type");
2828   return mname->int_field(_flags_offset);
2829 }
2830 
2831 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2832   assert(is_instance(mname), "wrong type");
2833   mname->int_field_put(_flags_offset, flags);
2834 }
2835 
2836 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2837   assert(is_instance(mname), "wrong type");
2838   return (Metadata*)mname->address_field(_vmtarget_offset);
2839 }
2840 
2841 bool java_lang_invoke_MemberName::is_method(oop mname) {
2842   assert(is_instance(mname), "must be MemberName");
2843   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2844 }
2845 
2846 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2847   assert(is_instance(mname), "wrong type");
2848   // check the type of the vmtarget
2849   oop dependency = NULL;
2850   if (ref != NULL) {
2851     switch (flags(mname) & (MN_IS_METHOD |
2852                             MN_IS_CONSTRUCTOR |
2853                             MN_IS_FIELD)) {
2854     case MN_IS_METHOD:
2855     case MN_IS_CONSTRUCTOR:
2856       assert(ref->is_method(), "should be a method");
2857       dependency = ((Method*)ref)->method_holder()->java_mirror();
2858       break;
2859     case MN_IS_FIELD:
2860       assert(ref->is_klass(), "should be a class");
2861       dependency = ((Klass*)ref)->java_mirror();
2862       break;
2863     default:
2864       ShouldNotReachHere();
2865     }
2866   }
2867   mname->address_field_put(_vmtarget_offset, (address)ref);
2868   // Add a reference to the loader (actually mirror because anonymous classes will not have
2869   // distinct loaders) to ensure the metadata is kept alive
2870   // This mirror may be different than the one in clazz field.
2871   mname->obj_field_put(_vmloader_offset, dependency);
2872 }
2873 
2874 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2875   assert(is_instance(mname), "wrong type");
2876   return (intptr_t) mname->address_field(_vmindex_offset);
2877 }
2878 
2879 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2880   assert(is_instance(mname), "wrong type");
2881   mname->address_field_put(_vmindex_offset, (address) index);
2882 }
2883 
2884 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) {
2885   if (mn1 == mn2) {
2886      return true;
2887   }
2888   return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) &&
2889           vmindex(mn1) == vmindex(mn2) &&
2890           clazz(mn1) == clazz(mn2));
2891 }
2892 
2893 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2894   assert(is_instance(lform), "wrong type");
2895   return lform->obj_field(_vmentry_offset);
2896 }
2897 
2898 
2899 // Support for java_lang_invoke_MethodType
2900 
2901 int java_lang_invoke_MethodType::_rtype_offset;
2902 int java_lang_invoke_MethodType::_ptypes_offset;
2903 
2904 void java_lang_invoke_MethodType::compute_offsets() {
2905   Klass* k = SystemDictionary::MethodType_klass();
2906   if (k != NULL) {
2907     compute_offset(_rtype_offset,  k, vmSymbols::rtype_name(),  vmSymbols::class_signature());
2908     compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2909   }
2910 }
2911 
2912 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2913   st->print("(");
2914   objArrayOop pts = ptypes(mt);
2915   for (int i = 0, limit = pts->length(); i < limit; i++) {
2916     java_lang_Class::print_signature(pts->obj_at(i), st);
2917   }
2918   st->print(")");
2919   java_lang_Class::print_signature(rtype(mt), st);
2920 }
2921 
2922 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2923   ResourceMark rm;
2924   stringStream buffer(128);
2925   print_signature(mt, &buffer);
2926   const char* sigstr =       buffer.base();
2927   int         siglen = (int) buffer.size();
2928   Symbol *name;
2929   if (!intern_if_not_found) {
2930     name = SymbolTable::probe(sigstr, siglen);
2931   } else {
2932     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2933   }
2934   return name;
2935 }
2936 
2937 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2938   if (mt1 == mt2)
2939     return true;
2940   if (rtype(mt1) != rtype(mt2))
2941     return false;
2942   if (ptype_count(mt1) != ptype_count(mt2))
2943     return false;
2944   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2945     if (ptype(mt1, i) != ptype(mt2, i))
2946       return false;
2947   }
2948   return true;
2949 }
2950 
2951 oop java_lang_invoke_MethodType::rtype(oop mt) {
2952   assert(is_instance(mt), "must be a MethodType");
2953   return mt->obj_field(_rtype_offset);
2954 }
2955 
2956 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2957   assert(is_instance(mt), "must be a MethodType");
2958   return (objArrayOop) mt->obj_field(_ptypes_offset);
2959 }
2960 
2961 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2962   return ptypes(mt)->obj_at(idx);
2963 }
2964 
2965 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2966   return ptypes(mt)->length();
2967 }
2968 
2969 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2970   objArrayOop pts = ptypes(mt);
2971   int count = pts->length();
2972   int slots = 0;
2973   for (int i = 0; i < count; i++) {
2974     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2975     slots += type2size[bt];
2976   }
2977   return slots;
2978 }
2979 
2980 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2981   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2982   return type2size[bt];
2983 }
2984 
2985 
2986 // Support for java_lang_invoke_CallSite
2987 
2988 int java_lang_invoke_CallSite::_target_offset;
2989 
2990 void java_lang_invoke_CallSite::compute_offsets() {
2991   if (!EnableInvokeDynamic)  return;
2992   Klass* k = SystemDictionary::CallSite_klass();
2993   if (k != NULL) {
2994     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2995   }
2996 }
2997 
2998 
2999 // Support for java_security_AccessControlContext
3000 
3001 int java_security_AccessControlContext::_context_offset = 0;
3002 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3003 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3004 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3005 
3006 void java_security_AccessControlContext::compute_offsets() {
3007   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3008   fieldDescriptor fd;
3009   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3010 
3011   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3012     fatal("Invalid layout of java.security.AccessControlContext");
3013   }
3014   _context_offset = fd.offset();
3015 
3016   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3017     fatal("Invalid layout of java.security.AccessControlContext");
3018   }
3019   _privilegedContext_offset = fd.offset();
3020 
3021   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3022     fatal("Invalid layout of java.security.AccessControlContext");
3023   }
3024   _isPrivileged_offset = fd.offset();
3025 
3026   // The offset may not be present for bootstrapping with older JDK.
3027   if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3028     _isAuthorized_offset = fd.offset();
3029   }
3030 }
3031 
3032 
3033 bool java_security_AccessControlContext::is_authorized(Handle context) {
3034   assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3035   assert(_isAuthorized_offset != -1, "should be set");
3036   return context->bool_field(_isAuthorized_offset) != 0;
3037 }
3038 
3039 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3040   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3041   // Ensure klass is initialized
3042   InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3043   // Allocate result
3044   oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3045   // Fill in values
3046   result->obj_field_put(_context_offset, context());
3047   result->obj_field_put(_privilegedContext_offset, privileged_context());
3048   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3049   // whitelist AccessControlContexts created by the JVM if present
3050   if (_isAuthorized_offset != -1) {
3051     result->bool_field_put(_isAuthorized_offset, true);
3052   }
3053   return result;
3054 }
3055 
3056 
3057 // Support for java_lang_ClassLoader
3058 
3059 bool java_lang_ClassLoader::offsets_computed = false;
3060 int  java_lang_ClassLoader::_loader_data_offset = -1;
3061 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3062 
3063 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3064     assert(loader != NULL && loader->is_oop(), "loader must be oop");
3065     return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3066 }
3067 
3068 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3069   return *java_lang_ClassLoader::loader_data_addr(loader);
3070 }
3071 
3072 void java_lang_ClassLoader::compute_offsets() {
3073   assert(!offsets_computed, "offsets should be initialized only once");
3074   offsets_computed = true;
3075 
3076   // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3077   Klass* k1 = SystemDictionary::ClassLoader_klass();
3078   compute_optional_offset(parallelCapable_offset,
3079     k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3080 
3081   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3082 }
3083 
3084 oop java_lang_ClassLoader::parent(oop loader) {
3085   assert(is_instance(loader), "loader must be oop");
3086   return loader->obj_field(parent_offset);
3087 }
3088 
3089 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3090   assert(is_instance(loader), "loader must be oop");
3091   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3092   oop acl = loader;
3093   debug_only(jint loop_count = 0);
3094   // This loop taken verbatim from ClassLoader.java:
3095   do {
3096     acl = parent(acl);
3097     if (cl == acl) {
3098       return true;
3099     }
3100     assert(++loop_count > 0, "loop_count overflow");
3101   } while (acl != NULL);
3102   return false;
3103 }
3104 
3105 
3106 // For class loader classes, parallelCapable defined
3107 // based on non-null field
3108 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3109 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3110   if (!JDK_Version::is_gte_jdk17x_version()
3111      || parallelCapable_offset == -1) {
3112      // Default for backward compatibility is false
3113      return false;
3114   }
3115   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3116 }
3117 
3118 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3119   // Fix for 4474172; see evaluation for more details
3120   loader = non_reflection_class_loader(loader);
3121 
3122   oop cl = SystemDictionary::java_system_loader();
3123   while(cl != NULL) {
3124     if (cl == loader) return true;
3125     cl = parent(cl);
3126   }
3127   return false;
3128 }
3129 
3130 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3131   if (loader != NULL) {
3132     // See whether this is one of the class loaders associated with
3133     // the generated bytecodes for reflection, and if so, "magically"
3134     // delegate to its parent to prevent class loading from occurring
3135     // in places where applications using reflection didn't expect it.
3136     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3137     // This might be null in non-1.4 JDKs
3138     if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3139       return parent(loader);
3140     }
3141   }
3142   return loader;
3143 }
3144 
3145 
3146 // Support for java_lang_System
3147 int java_lang_System::in_offset_in_bytes() {
3148   return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3149 }
3150 
3151 
3152 int java_lang_System::out_offset_in_bytes() {
3153   return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3154 }
3155 
3156 
3157 int java_lang_System::err_offset_in_bytes() {
3158   return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3159 }
3160 
3161 
3162 bool java_lang_System::has_security_manager() {
3163   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3164   address addr = ik->static_field_addr(static_security_offset);
3165   if (UseCompressedOops) {
3166     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3167   } else {
3168     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3169   }
3170 }
3171 
3172 int java_lang_Class::_klass_offset;
3173 int java_lang_Class::_array_klass_offset;
3174 int java_lang_Class::_oop_size_offset;
3175 int java_lang_Class::_static_oop_field_count_offset;
3176 int java_lang_Class::_class_loader_offset;
3177 int java_lang_Class::_protection_domain_offset;
3178 int java_lang_Class::_init_lock_offset;
3179 int java_lang_Class::_signers_offset;
3180 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3181 int java_lang_Throwable::backtrace_offset;
3182 int java_lang_Throwable::detailMessage_offset;
3183 int java_lang_Throwable::cause_offset;
3184 int java_lang_Throwable::stackTrace_offset;
3185 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3186 int java_lang_reflect_AccessibleObject::override_offset;
3187 int java_lang_reflect_Method::clazz_offset;
3188 int java_lang_reflect_Method::name_offset;
3189 int java_lang_reflect_Method::returnType_offset;
3190 int java_lang_reflect_Method::parameterTypes_offset;
3191 int java_lang_reflect_Method::exceptionTypes_offset;
3192 int java_lang_reflect_Method::slot_offset;
3193 int java_lang_reflect_Method::modifiers_offset;
3194 int java_lang_reflect_Method::signature_offset;
3195 int java_lang_reflect_Method::annotations_offset;
3196 int java_lang_reflect_Method::parameter_annotations_offset;
3197 int java_lang_reflect_Method::annotation_default_offset;
3198 int java_lang_reflect_Method::type_annotations_offset;
3199 int java_lang_reflect_Constructor::clazz_offset;
3200 int java_lang_reflect_Constructor::parameterTypes_offset;
3201 int java_lang_reflect_Constructor::exceptionTypes_offset;
3202 int java_lang_reflect_Constructor::slot_offset;
3203 int java_lang_reflect_Constructor::modifiers_offset;
3204 int java_lang_reflect_Constructor::signature_offset;
3205 int java_lang_reflect_Constructor::annotations_offset;
3206 int java_lang_reflect_Constructor::parameter_annotations_offset;
3207 int java_lang_reflect_Constructor::type_annotations_offset;
3208 int java_lang_reflect_Field::clazz_offset;
3209 int java_lang_reflect_Field::name_offset;
3210 int java_lang_reflect_Field::type_offset;
3211 int java_lang_reflect_Field::slot_offset;
3212 int java_lang_reflect_Field::modifiers_offset;
3213 int java_lang_reflect_Field::signature_offset;
3214 int java_lang_reflect_Field::annotations_offset;
3215 int java_lang_reflect_Field::type_annotations_offset;
3216 int java_lang_reflect_Parameter::name_offset;
3217 int java_lang_reflect_Parameter::modifiers_offset;
3218 int java_lang_reflect_Parameter::index_offset;
3219 int java_lang_reflect_Parameter::executable_offset;
3220 int java_lang_boxing_object::value_offset;
3221 int java_lang_boxing_object::long_value_offset;
3222 int java_lang_ref_Reference::referent_offset;
3223 int java_lang_ref_Reference::queue_offset;
3224 int java_lang_ref_Reference::next_offset;
3225 int java_lang_ref_Reference::discovered_offset;
3226 int java_lang_ref_Reference::static_lock_offset;
3227 int java_lang_ref_Reference::static_pending_offset;
3228 int java_lang_ref_Reference::number_of_fake_oop_fields;
3229 int java_lang_ref_ReferenceQueue::static_NULL_queue_offset;
3230 int java_lang_ref_ReferenceQueue::static_ENQUEUED_queue_offset;
3231 int java_lang_ref_SoftReference::timestamp_offset;
3232 int java_lang_ref_SoftReference::static_clock_offset;
3233 int java_lang_ClassLoader::parent_offset;
3234 int java_lang_System::static_in_offset;
3235 int java_lang_System::static_out_offset;
3236 int java_lang_System::static_err_offset;
3237 int java_lang_System::static_security_offset;
3238 int java_lang_StackTraceElement::declaringClass_offset;
3239 int java_lang_StackTraceElement::methodName_offset;
3240 int java_lang_StackTraceElement::fileName_offset;
3241 int java_lang_StackTraceElement::lineNumber_offset;
3242 int java_lang_AssertionStatusDirectives::classes_offset;
3243 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3244 int java_lang_AssertionStatusDirectives::packages_offset;
3245 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3246 int java_lang_AssertionStatusDirectives::deflt_offset;
3247 int java_nio_Buffer::_limit_offset;
3248 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3249 int sun_reflect_ConstantPool::_oop_offset;
3250 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3251 
3252 
3253 // Support for java_lang_StackTraceElement
3254 
3255 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3256   element->obj_field_put(fileName_offset, value);
3257 }
3258 
3259 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3260   element->obj_field_put(declaringClass_offset, value);
3261 }
3262 
3263 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3264   element->obj_field_put(methodName_offset, value);
3265 }
3266 
3267 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3268   element->int_field_put(lineNumber_offset, value);
3269 }
3270 
3271 
3272 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3273 
3274 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3275   o->obj_field_put(classes_offset, val);
3276 }
3277 
3278 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3279   o->obj_field_put(classEnabled_offset, val);
3280 }
3281 
3282 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3283   o->obj_field_put(packages_offset, val);
3284 }
3285 
3286 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3287   o->obj_field_put(packageEnabled_offset, val);
3288 }
3289 
3290 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3291   o->bool_field_put(deflt_offset, val);
3292 }
3293 
3294 
3295 // Support for intrinsification of java.nio.Buffer.checkIndex
3296 int java_nio_Buffer::limit_offset() {
3297   return _limit_offset;
3298 }
3299 
3300 
3301 void java_nio_Buffer::compute_offsets() {
3302   Klass* k = SystemDictionary::nio_Buffer_klass();
3303   assert(k != NULL, "must be loaded in 1.4+");
3304   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3305 }
3306 
3307 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3308   if (_owner_offset != 0) return;
3309 
3310   assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3311   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3312   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3313   compute_offset(_owner_offset, k,
3314                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3315 }
3316 
3317 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3318   assert(_owner_offset != 0, "Must be initialized");
3319   return obj->obj_field(_owner_offset);
3320 }
3321 
3322 // Compute hard-coded offsets
3323 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3324 // are not available to determine the offset_of_static_fields.
3325 void JavaClasses::compute_hard_coded_offsets() {
3326   const int x = heapOopSize;
3327   const int header = instanceOopDesc::base_offset_in_bytes();
3328 
3329   // Throwable Class
3330   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3331   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3332   java_lang_Throwable::cause_offset      = java_lang_Throwable::hc_cause_offset      * x + header;
3333   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3334   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3335 
3336   // java_lang_boxing_object
3337   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3338   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3339 
3340   // java_lang_ref_Reference:
3341   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3342   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3343   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3344   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3345   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3346   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3347   // Artificial fields for java_lang_ref_Reference
3348   // The first field is for the discovered field added in 1.4
3349   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3350 
3351   // java_lang_ref_SoftReference Class
3352   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3353   // Don't multiply static fields because they are always in wordSize units
3354   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3355 
3356   // java_lang_ClassLoader
3357   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3358 
3359   // java_lang_System
3360   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
3361   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3362   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3363   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3364 
3365   // java_lang_StackTraceElement
3366   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3367   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3368   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3369   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3370   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3371   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3372   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3373   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3374   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3375 
3376 }
3377 
3378 
3379 // Compute non-hard-coded field offsets of all the classes in this file
3380 void JavaClasses::compute_offsets() {
3381   // java_lang_Class::compute_offsets was called earlier in bootstrap
3382   java_lang_ClassLoader::compute_offsets();
3383   java_lang_Thread::compute_offsets();
3384   java_lang_ThreadGroup::compute_offsets();
3385   if (EnableInvokeDynamic) {
3386     java_lang_invoke_MethodHandle::compute_offsets();
3387     java_lang_invoke_DirectMethodHandle::compute_offsets();
3388     java_lang_invoke_MemberName::compute_offsets();
3389     java_lang_invoke_LambdaForm::compute_offsets();
3390     java_lang_invoke_MethodType::compute_offsets();
3391     java_lang_invoke_CallSite::compute_offsets();
3392   }
3393   java_security_AccessControlContext::compute_offsets();
3394   // Initialize reflection classes. The layouts of these classes
3395   // changed with the new reflection implementation in JDK 1.4, and
3396   // since the Universe doesn't know what JDK version it is until this
3397   // point we defer computation of these offsets until now.
3398   java_lang_reflect_AccessibleObject::compute_offsets();
3399   java_lang_reflect_Method::compute_offsets();
3400   java_lang_reflect_Constructor::compute_offsets();
3401   java_lang_reflect_Field::compute_offsets();
3402   if (JDK_Version::is_gte_jdk14x_version()) {
3403     java_nio_Buffer::compute_offsets();
3404   }
3405   if (JDK_Version::is_gte_jdk15x_version()) {
3406     sun_reflect_ConstantPool::compute_offsets();
3407     sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3408   }
3409   if (JDK_Version::is_jdk18x_version())
3410     java_lang_reflect_Parameter::compute_offsets();
3411 
3412   java_lang_ref_ReferenceQueue::compute_offsets();
3413 
3414   // generated interpreter code wants to know about the offsets we just computed:
3415   AbstractAssembler::update_delayed_values();
3416 }
3417 
3418 #ifndef PRODUCT
3419 
3420 // These functions exist to assert the validity of hard-coded field offsets to guard
3421 // against changes in the class files
3422 
3423 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3424   EXCEPTION_MARK;
3425   fieldDescriptor fd;
3426   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3427   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3428   instanceKlassHandle h_klass (THREAD, k);
3429   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3430   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3431   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3432     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3433     return false;
3434   }
3435   if (fd.is_static()) {
3436     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3437     return false;
3438   }
3439   if (fd.offset() == hardcoded_offset ) {
3440     return true;
3441   } else {
3442     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3443                   klass_name, field_name, hardcoded_offset, fd.offset());
3444     return false;
3445   }
3446 }
3447 
3448 
3449 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3450   EXCEPTION_MARK;
3451   fieldDescriptor fd;
3452   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3453   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3454   instanceKlassHandle h_klass (THREAD, k);
3455   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3456   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3457   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3458     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3459     return false;
3460   }
3461   if (!fd.is_static()) {
3462     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3463     return false;
3464   }
3465   if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3466     return true;
3467   } else {
3468     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());
3469     return false;
3470   }
3471 }
3472 
3473 
3474 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3475   EXCEPTION_MARK;
3476   fieldDescriptor fd;
3477   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3478   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3479   instanceKlassHandle h_klass (THREAD, k);
3480   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3481   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3482   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3483     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3484     return false;
3485   }
3486   if (!fd.is_static() || !fd.has_initial_value()) {
3487     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3488     return false;
3489   }
3490   if (!fd.initial_value_tag().is_int()) {
3491     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3492     return false;
3493   }
3494   jint field_value = fd.int_initial_value();
3495   if (field_value == hardcoded_constant) {
3496     return true;
3497   } else {
3498     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);
3499     return false;
3500   }
3501 }
3502 
3503 
3504 // Check the hard-coded field offsets of all the classes in this file
3505 
3506 void JavaClasses::check_offsets() {
3507   bool valid = true;
3508   HandleMark hm;
3509 
3510 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3511   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3512 
3513 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3514   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3515 
3516 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3517   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3518 
3519 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3520   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3521 
3522   // java.lang.String
3523 
3524   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3525   if (java_lang_String::has_offset_field()) {
3526     CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3527     CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3528   }
3529   if (java_lang_String::has_hash_field()) {
3530     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3531   }
3532 
3533   // java.lang.Class
3534 
3535   // Fake fields
3536   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3537   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3538 
3539   // java.lang.Throwable
3540 
3541   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3542   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3543   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3544   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3545 
3546   // Boxed primitive objects (java_lang_boxing_object)
3547 
3548   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3549   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3550   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3551   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3552   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3553   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3554   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3555   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3556 
3557   // java.lang.ClassLoader
3558 
3559   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
3560 
3561   // java.lang.System
3562 
3563   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3564   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3565   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3566   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3567 
3568   // java.lang.StackTraceElement
3569 
3570   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3571   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3572   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement,   fileName, "Ljava/lang/String;");
3573   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3574 
3575   // java.lang.ref.Reference
3576 
3577   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3578   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3579   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3580   // Fake field
3581   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3582   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3583   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3584 
3585   // java.lang.ref.SoftReference
3586 
3587   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3588   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3589 
3590   // java.lang.AssertionStatusDirectives
3591   //
3592   // The CheckAssertionStatusDirectives boolean can be removed from here and
3593   // globals.hpp after the AssertionStatusDirectives class has been integrated
3594   // into merlin "for some time."  Without it, the vm will fail with early
3595   // merlin builds.
3596 
3597   if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3598     const char* nm = "java/lang/AssertionStatusDirectives";
3599     const char* sig = "[Ljava/lang/String;";
3600     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3601     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3602     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3603     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3604     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3605   }
3606 
3607   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3608 }
3609 
3610 #endif // PRODUCT
3611 
3612 int InjectedField::compute_offset() {
3613   Klass* klass_oop = klass();
3614   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3615     if (!may_be_java && !fs.access_flags().is_internal()) {
3616       // Only look at injected fields
3617       continue;
3618     }
3619     if (fs.name() == name() && fs.signature() == signature()) {
3620       return fs.offset();
3621     }
3622   }
3623   ResourceMark rm;
3624   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)" : "");
3625 #ifndef PRODUCT
3626   klass_oop->print();
3627   tty->print_cr("all fields:");
3628   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3629     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3630   }
3631 #endif //PRODUCT
3632   vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3633   return -1;
3634 }
3635 
3636 void javaClasses_init() {
3637   JavaClasses::compute_offsets();
3638   JavaClasses::check_offsets();
3639   FilteredFieldsMap::initialize();  // must be done after computing offsets.
3640 }