1 /*
   2  * Copyright (c) 1997, 2016, 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/classLoaderData.inline.hpp"
  28 #include "classfile/javaClasses.inline.hpp"
  29 #include "classfile/moduleEntry.hpp"
  30 #include "classfile/stringTable.hpp"
  31 #include "classfile/vmSymbols.hpp"
  32 #include "code/debugInfo.hpp"
  33 #include "code/dependencyContext.hpp"
  34 #include "code/pcDesc.hpp"
  35 #include "interpreter/interpreter.hpp"
  36 #include "memory/oopFactory.hpp"
  37 #include "memory/resourceArea.hpp"
  38 #include "memory/universe.inline.hpp"
  39 #include "oops/fieldStreams.hpp"
  40 #include "oops/instanceKlass.hpp"
  41 #include "oops/instanceMirrorKlass.hpp"
  42 #include "oops/klass.hpp"
  43 #include "oops/method.hpp"
  44 #include "oops/objArrayOop.inline.hpp"
  45 #include "oops/oop.inline.hpp"
  46 #include "oops/symbol.hpp"
  47 #include "oops/typeArrayOop.hpp"
  48 #include "runtime/fieldDescriptor.hpp"
  49 #include "runtime/handles.inline.hpp"
  50 #include "runtime/interfaceSupport.hpp"
  51 #include "runtime/java.hpp"
  52 #include "runtime/javaCalls.hpp"
  53 #include "runtime/safepoint.hpp"
  54 #include "runtime/thread.inline.hpp"
  55 #include "runtime/vframe.hpp"
  56 #include "utilities/preserveException.hpp"
  57 
  58 #if INCLUDE_JVMCI
  59 #include "jvmci/jvmciJavaClasses.hpp"
  60 #endif
  61 
  62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  63   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  64 
  65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  66   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  67 
  68 InjectedField JavaClasses::_injected_fields[] = {
  69   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  70 };
  71 
  72 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  73   return _injected_fields[id].compute_offset();
  74 }
  75 
  76 
  77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  78   *field_count = 0;
  79 
  80   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  81   if (sid == vmSymbols::NO_SID) {
  82     // Only well known classes can inject fields
  83     return NULL;
  84   }
  85 
  86   int count = 0;
  87   int start = -1;
  88 
  89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
  90   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
  91     count++;                                                       \
  92     if (start == -1) start = klass##_##name##_enum;                \
  93   }
  94   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
  95 #undef LOOKUP_INJECTED_FIELD
  96 
  97   if (start != -1) {
  98     *field_count = count;
  99     return _injected_fields + start;
 100   }
 101   return NULL;
 102 }
 103 
 104 
 105 static bool find_field(InstanceKlass* ik,
 106                        Symbol* name_symbol, Symbol* signature_symbol,
 107                        fieldDescriptor* fd,
 108                        bool is_static = false, bool allow_super = false) {
 109   if (allow_super || is_static) {
 110     return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
 111   } else {
 112     return ik->find_local_field(name_symbol, signature_symbol, fd);
 113   }
 114 }
 115 
 116 // Helpful routine for computing field offsets at run time rather than hardcoding them
 117 static void
 118 compute_offset(int &dest_offset,
 119                Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
 120                bool is_static = false, bool allow_super = false) {
 121   fieldDescriptor fd;
 122   InstanceKlass* ik = InstanceKlass::cast(klass);
 123   if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
 124     ResourceMark rm;
 125     tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
 126 #ifndef PRODUCT
 127     ik->print();
 128     tty->print_cr("all fields:");
 129     for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
 130       tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
 131     }
 132 #endif //PRODUCT
 133     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
 134   }
 135   dest_offset = fd.offset();
 136 }
 137 
 138 // Same as above but for "optional" offsets that might not be present in certain JDK versions
 139 static void
 140 compute_optional_offset(int& dest_offset,
 141                         Klass* klass, Symbol* name_symbol, Symbol* signature_symbol,
 142                         bool allow_super = false) {
 143   fieldDescriptor fd;
 144   InstanceKlass* ik = InstanceKlass::cast(klass);
 145   if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
 146     dest_offset = fd.offset();
 147   }
 148 }
 149 
 150 
 151 int java_lang_String::value_offset  = 0;
 152 int java_lang_String::hash_offset   = 0;
 153 int java_lang_String::coder_offset  = 0;
 154 
 155 bool java_lang_String::initialized  = false;
 156 
 157 bool java_lang_String::is_instance(oop obj) {
 158   return is_instance_inlined(obj);
 159 }
 160 
 161 void java_lang_String::compute_offsets() {
 162   assert(!initialized, "offsets should be initialized only once");
 163 
 164   Klass* k = SystemDictionary::String_klass();
 165   compute_offset(value_offset,           k, vmSymbols::value_name(),  vmSymbols::byte_array_signature());
 166   compute_optional_offset(hash_offset,   k, vmSymbols::hash_name(),   vmSymbols::int_signature());
 167   compute_optional_offset(coder_offset,  k, vmSymbols::coder_name(),  vmSymbols::byte_signature());
 168 
 169   initialized = true;
 170 }
 171 
 172 class CompactStringsFixup : public FieldClosure {
 173 private:
 174   bool _value;
 175 
 176 public:
 177   CompactStringsFixup(bool value) : _value(value) {}
 178 
 179   void do_field(fieldDescriptor* fd) {
 180     if (fd->name() == vmSymbols::compact_strings_name()) {
 181       oop mirror = fd->field_holder()->java_mirror();
 182       assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
 183       assert(mirror != NULL, "String must have mirror already");
 184       mirror->bool_field_put(fd->offset(), _value);
 185     }
 186   }
 187 };
 188 
 189 void java_lang_String::set_compact_strings(bool value) {
 190   CompactStringsFixup fix(value);
 191   InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
 192 }
 193 
 194 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 195   assert(initialized, "Must be initialized");
 196   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 197 
 198   // Create the String object first, so there's a chance that the String
 199   // and the char array it points to end up in the same cache line.
 200   oop obj;
 201   obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
 202 
 203   // Create the char array.  The String object must be handlized here
 204   // because GC can happen as a result of the allocation attempt.
 205   Handle h_obj(THREAD, obj);
 206   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 207   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 208 
 209   // Point the String at the char array
 210   obj = h_obj();
 211   set_value(obj, buffer);
 212   // No need to zero the offset, allocation zero'ed the entire String object
 213   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 214   return h_obj;
 215 }
 216 
 217 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
 218   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 219   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 220   typeArrayOop buffer = value(h_obj());
 221   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 222   if (is_latin1) {
 223     for (int index = 0; index < length; index++) {
 224       buffer->byte_at_put(index, (jbyte)unicode[index]);
 225     }
 226   } else {
 227     for (int index = 0; index < length; index++) {
 228       buffer->char_at_put(index, unicode[index]);
 229     }
 230   }
 231 
 232 #ifdef ASSERT
 233   {
 234     ResourceMark rm;
 235     char* expected = UNICODE::as_utf8(unicode, length);
 236     char* actual = as_utf8_string(h_obj());
 237     if (strcmp(expected, actual) != 0) {
 238       tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
 239       ShouldNotReachHere();
 240     }
 241   }
 242 #endif
 243 
 244   return h_obj;
 245 }
 246 
 247 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
 248   Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
 249   return h_obj();
 250 }
 251 
 252 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 253   if (utf8_str == NULL) {
 254     return Handle();
 255   }
 256   bool has_multibyte, is_latin1;
 257   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 258   if (!CompactStrings) {
 259     has_multibyte = true;
 260     is_latin1 = false;
 261   }
 262 
 263   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 264   if (length > 0) {
 265     if (!has_multibyte) {
 266       strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
 267     } else if (is_latin1) {
 268       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 269     } else {
 270       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 271     }
 272   }
 273 
 274 #ifdef ASSERT
 275   // This check is too strict because the input string is not necessarily valid UTF8.
 276   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 277   /*
 278   {
 279     ResourceMark rm;
 280     const char* expected = utf8_str;
 281     char* actual = as_utf8_string(h_obj());
 282     if (strcmp(expected, actual) != 0) {
 283       tty->print_cr("String conversion failure: %s --> %s", expected, actual);
 284       ShouldNotReachHere();
 285     }
 286   }
 287   */
 288 #endif
 289 
 290   return h_obj;
 291 }
 292 
 293 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 294   Handle h_obj = create_from_str(utf8_str, CHECK_0);
 295   return h_obj();
 296 }
 297 
 298 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 299   const char* utf8_str = (char*)symbol->bytes();
 300   int utf8_len = symbol->utf8_length();
 301 
 302   bool has_multibyte, is_latin1;
 303   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 304   if (!CompactStrings) {
 305     has_multibyte = true;
 306     is_latin1 = false;
 307   }
 308 
 309   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 310   if (length > 0) {
 311     if (!has_multibyte) {
 312       strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
 313     } else if (is_latin1) {
 314       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 315     } else {
 316       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 317     }
 318   }
 319 
 320 #ifdef ASSERT
 321   // This check is too strict because the input symbol does not necessarily contain valid UTF8.
 322   // For example, it may be created with arbitrary content via jni_FindClass.
 323   /*
 324   {
 325     ResourceMark rm;
 326     const char* expected = symbol->as_utf8();
 327     char* actual = as_utf8_string(h_obj());
 328     if (strncmp(expected, actual, utf8_len) != 0) {
 329       tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
 330       ShouldNotReachHere();
 331     }
 332   }
 333   */
 334 #endif
 335 
 336   return h_obj;
 337 }
 338 
 339 // Converts a C string to a Java String based on current encoding
 340 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 341   assert(str != NULL, "bad arguments");
 342 
 343   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 344   static to_java_string_fn_t _to_java_string_fn = NULL;
 345 
 346   if (_to_java_string_fn == NULL) {
 347     void *lib_handle = os::native_java_library();
 348     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 349     if (_to_java_string_fn == NULL) {
 350       fatal("NewStringPlatform missing");
 351     }
 352   }
 353 
 354   jstring js = NULL;
 355   { JavaThread* thread = (JavaThread*)THREAD;
 356     assert(thread->is_Java_thread(), "must be java thread");
 357     HandleMark hm(thread);
 358     ThreadToNativeFromVM ttn(thread);
 359     js = (_to_java_string_fn)(thread->jni_environment(), str);
 360   }
 361   return Handle(THREAD, JNIHandles::resolve(js));
 362 }
 363 
 364 // Converts a Java String to a native C string that can be used for
 365 // native OS calls.
 366 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 367   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 368   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 369 
 370   if (_to_platform_string_fn == NULL) {
 371     void *lib_handle = os::native_java_library();
 372     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 373     if (_to_platform_string_fn == NULL) {
 374       fatal("GetStringPlatformChars missing");
 375     }
 376   }
 377 
 378   char *native_platform_string;
 379   { JavaThread* thread = (JavaThread*)THREAD;
 380     assert(thread->is_Java_thread(), "must be java thread");
 381     JNIEnv *env = thread->jni_environment();
 382     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 383     bool is_copy;
 384     HandleMark hm(thread);
 385     ThreadToNativeFromVM ttn(thread);
 386     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 387     assert(is_copy == JNI_TRUE, "is_copy value changed");
 388     JNIHandles::destroy_local(js);
 389   }
 390   return native_platform_string;
 391 }
 392 
 393 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 394   oop          obj    = java_string();
 395   // Typical usage is to convert all '/' to '.' in string.
 396   typeArrayOop value  = java_lang_String::value(obj);
 397   int          length = java_lang_String::length(obj);
 398   bool      is_latin1 = java_lang_String::is_latin1(obj);
 399 
 400   // First check if any from_char exist
 401   int index; // Declared outside, used later
 402   for (index = 0; index < length; index++) {
 403     jchar c = !is_latin1 ? value->char_at(index) :
 404                   ((jchar) value->byte_at(index)) & 0xff;
 405     if (c == from_char) {
 406       break;
 407     }
 408   }
 409   if (index == length) {
 410     // No from_char, so do not copy.
 411     return java_string;
 412   }
 413 
 414   // Check if result string will be latin1
 415   bool to_is_latin1 = false;
 416 
 417   // Replacement char must be latin1
 418   if (CompactStrings && UNICODE::is_latin1(to_char)) {
 419     if (is_latin1) {
 420       // Source string is latin1 as well
 421       to_is_latin1 = true;
 422     } else if (!UNICODE::is_latin1(from_char)) {
 423       // We are replacing an UTF16 char. Scan string to
 424       // check if result can be latin1 encoded.
 425       to_is_latin1 = true;
 426       for (index = 0; index < length; index++) {
 427         jchar c = value->char_at(index);
 428         if (c != from_char && !UNICODE::is_latin1(c)) {
 429           to_is_latin1 = false;
 430           break;
 431         }
 432       }
 433     }
 434   }
 435 
 436   // Create new UNICODE (or byte) buffer. Must handlize value because GC
 437   // may happen during String and char array creation.
 438   typeArrayHandle h_value(THREAD, value);
 439   Handle string = basic_create(length, to_is_latin1, CHECK_NH);
 440   typeArrayOop from_buffer = h_value();
 441   typeArrayOop to_buffer = java_lang_String::value(string());
 442 
 443   // Copy contents
 444   for (index = 0; index < length; index++) {
 445     jchar c = (!is_latin1) ? from_buffer->char_at(index) :
 446                     ((jchar) from_buffer->byte_at(index)) & 0xff;
 447     if (c == from_char) {
 448       c = to_char;
 449     }
 450     if (!to_is_latin1) {
 451       to_buffer->char_at_put(index, c);
 452     } else {
 453       to_buffer->byte_at_put(index, (jbyte) c);
 454     }
 455   }
 456   return string;
 457 }
 458 
 459 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 460   typeArrayOop value  = java_lang_String::value(java_string);
 461                length = java_lang_String::length(java_string);
 462   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 463 
 464   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 465   if (result != NULL) {
 466     if (!is_latin1) {
 467       for (int index = 0; index < length; index++) {
 468         result[index] = value->char_at(index);
 469       }
 470     } else {
 471       for (int index = 0; index < length; index++) {
 472         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 473       }
 474     }
 475   } else {
 476     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 477   }
 478   return result;
 479 }
 480 
 481 unsigned int java_lang_String::hash_code(oop java_string) {
 482   int          length = java_lang_String::length(java_string);
 483   // Zero length string will hash to zero with String.hashCode() function.
 484   if (length == 0) return 0;
 485 
 486   typeArrayOop value  = java_lang_String::value(java_string);
 487   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 488 
 489   if (is_latin1) {
 490     return java_lang_String::hash_code(value->byte_at_addr(0), length);
 491   } else {
 492     return java_lang_String::hash_code(value->char_at_addr(0), length);
 493   }
 494 }
 495 
 496 char* java_lang_String::as_quoted_ascii(oop java_string) {
 497   typeArrayOop value  = java_lang_String::value(java_string);
 498   int          length = java_lang_String::length(java_string);
 499   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 500 
 501   if (length == 0) return NULL;
 502 
 503   char* result;
 504   int result_length;
 505   if (!is_latin1) {
 506     jchar* base = value->char_at_addr(0);
 507     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 508     result = NEW_RESOURCE_ARRAY(char, result_length);
 509     UNICODE::as_quoted_ascii(base, length, result, result_length);
 510   } else {
 511     jbyte* base = value->byte_at_addr(0);
 512     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 513     result = NEW_RESOURCE_ARRAY(char, result_length);
 514     UNICODE::as_quoted_ascii(base, length, result, result_length);
 515   }
 516   assert(result_length >= length + 1, "must not be shorter");
 517   assert(result_length == (int)strlen(result) + 1, "must match");
 518   return result;
 519 }
 520 
 521 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
 522   oop          obj    = java_string();
 523   typeArrayOop value  = java_lang_String::value(obj);
 524   int          length = java_lang_String::length(obj);
 525   bool      is_latin1 = java_lang_String::is_latin1(obj);
 526   if (!is_latin1) {
 527     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 528     Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
 529     return sym;
 530   } else {
 531     ResourceMark rm;
 532     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 533     const char* base = UNICODE::as_utf8(position, length);
 534     Symbol* sym = SymbolTable::lookup(base, length, THREAD);
 535     return sym;
 536   }
 537 }
 538 
 539 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 540   typeArrayOop value  = java_lang_String::value(java_string);
 541   int          length = java_lang_String::length(java_string);
 542   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 543   if (!is_latin1) {
 544     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 545     return SymbolTable::probe_unicode(base, length);
 546   } else {
 547     ResourceMark rm;
 548     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 549     const char* base = UNICODE::as_utf8(position, length);
 550     return SymbolTable::probe(base, length);
 551   }
 552 }
 553 
 554 int java_lang_String::utf8_length(oop java_string) {
 555   typeArrayOop value  = java_lang_String::value(java_string);
 556   int          length = java_lang_String::length(java_string);
 557   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 558   if (length == 0) {
 559     return 0;
 560   }
 561   if (!is_latin1) {
 562     return UNICODE::utf8_length(value->char_at_addr(0), length);
 563   } else {
 564     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 565   }
 566 }
 567 
 568 char* java_lang_String::as_utf8_string(oop java_string) {
 569   typeArrayOop value  = java_lang_String::value(java_string);
 570   int          length = java_lang_String::length(java_string);
 571   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 572   if (!is_latin1) {
 573     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 574     return UNICODE::as_utf8(position, length);
 575   } else {
 576     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 577     return UNICODE::as_utf8(position, length);
 578   }
 579 }
 580 
 581 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 582   typeArrayOop value  = java_lang_String::value(java_string);
 583   int          length = java_lang_String::length(java_string);
 584   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 585   if (!is_latin1) {
 586     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 587     return UNICODE::as_utf8(position, length, buf, buflen);
 588   } else {
 589     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 590     return UNICODE::as_utf8(position, length, buf, buflen);
 591   }
 592 }
 593 
 594 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 595   typeArrayOop value  = java_lang_String::value(java_string);
 596   int          length = java_lang_String::length(java_string);
 597   assert(start + len <= length, "just checking");
 598   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 599   if (!is_latin1) {
 600     jchar* position = value->char_at_addr(start);
 601     return UNICODE::as_utf8(position, len);
 602   } else {
 603     jbyte* position = value->byte_at_addr(start);
 604     return UNICODE::as_utf8(position, len);
 605   }
 606 }
 607 
 608 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
 609   typeArrayOop value  = java_lang_String::value(java_string);
 610   int          length = java_lang_String::length(java_string);
 611   assert(start + len <= length, "just checking");
 612   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 613   if (!is_latin1) {
 614     jchar* position = value->char_at_addr(start);
 615     return UNICODE::as_utf8(position, len, buf, buflen);
 616   } else {
 617     jbyte* position = value->byte_at_addr(start);
 618     return UNICODE::as_utf8(position, len, buf, buflen);
 619   }
 620 }
 621 
 622 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
 623   assert(java_string->klass() == SystemDictionary::String_klass(),
 624          "must be java_string");
 625   typeArrayOop value  = java_lang_String::value(java_string);
 626   int          length = java_lang_String::length(java_string);
 627   if (length != len) {
 628     return false;
 629   }
 630   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 631   if (!is_latin1) {
 632     for (int i = 0; i < len; i++) {
 633       if (value->char_at(i) != chars[i]) {
 634         return false;
 635       }
 636     }
 637   } else {
 638     for (int i = 0; i < len; i++) {
 639       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 640         return false;
 641       }
 642     }
 643   }
 644   return true;
 645 }
 646 
 647 bool java_lang_String::equals(oop str1, oop str2) {
 648   assert(str1->klass() == SystemDictionary::String_klass(),
 649          "must be java String");
 650   assert(str2->klass() == SystemDictionary::String_klass(),
 651          "must be java String");
 652   typeArrayOop value1  = java_lang_String::value(str1);
 653   int          length1 = java_lang_String::length(str1);
 654   bool       is_latin1 = java_lang_String::is_latin1(str1);
 655   typeArrayOop value2  = java_lang_String::value(str2);
 656   int          length2 = java_lang_String::length(str2);
 657   bool       is_latin2 = java_lang_String::is_latin1(str2);
 658 
 659   if ((length1 != length2) || (is_latin1 != is_latin2)) {
 660     // Strings of different size or with different
 661     // coders are never equal.
 662     return false;
 663   }
 664   int blength1 = value1->length();
 665   for (int i = 0; i < value1->length(); i++) {
 666     if (value1->byte_at(i) != value2->byte_at(i)) {
 667       return false;
 668     }
 669   }
 670   return true;
 671 }
 672 
 673 void java_lang_String::print(oop java_string, outputStream* st) {
 674   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 675   typeArrayOop value  = java_lang_String::value(java_string);
 676 
 677   if (value == NULL) {
 678     // This can happen if, e.g., printing a String
 679     // object before its initializer has been called
 680     st->print("NULL");
 681     return;
 682   }
 683 
 684   int length = java_lang_String::length(java_string);
 685   bool is_latin1 = java_lang_String::is_latin1(java_string);
 686 
 687   st->print("\"");
 688   for (int index = 0; index < length; index++) {
 689     st->print("%c", (!is_latin1) ?  value->char_at(index) :
 690                            ((jchar) value->byte_at(index)) & 0xff );
 691   }
 692   st->print("\"");
 693 }
 694 
 695 
 696 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 697   assert(mirror.not_null() && fd->is_static(), "just checking");
 698   if (fd->has_initial_value()) {
 699     BasicType t = fd->field_type();
 700     switch (t) {
 701       case T_BYTE:
 702         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 703               break;
 704       case T_BOOLEAN:
 705         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 706               break;
 707       case T_CHAR:
 708         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 709               break;
 710       case T_SHORT:
 711         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 712               break;
 713       case T_INT:
 714         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 715         break;
 716       case T_FLOAT:
 717         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 718         break;
 719       case T_DOUBLE:
 720         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 721         break;
 722       case T_LONG:
 723         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 724         break;
 725       case T_OBJECT:
 726         {
 727           #ifdef ASSERT
 728           TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
 729           assert(fd->signature() == sym, "just checking");
 730           #endif
 731           oop string = fd->string_initial_value(CHECK);
 732           mirror()->obj_field_put(fd->offset(), string);
 733         }
 734         break;
 735       default:
 736         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 737                   "Illegal ConstantValue attribute in class file");
 738     }
 739   }
 740 }
 741 
 742 
 743 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
 744   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 745 
 746   // If the offset was read from the shared archive, it was fixed up already
 747   if (!k->is_shared()) {
 748     if (k->is_instance_klass()) {
 749       // During bootstrap, java.lang.Class wasn't loaded so static field
 750       // offsets were computed without the size added it.  Go back and
 751       // update all the static field offsets to included the size.
 752         for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
 753         if (fs.access_flags().is_static()) {
 754           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 755           fs.set_offset(real_offset);
 756         }
 757       }
 758     }
 759   }
 760   create_mirror(k, Handle(NULL), Handle(NULL), Handle(NULL), CHECK);
 761 }
 762 
 763 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
 764                                                Handle mirror,
 765                                                Handle protection_domain,
 766                                                TRAPS) {
 767   // Allocate a simple java object for a lock.
 768   // This needs to be a java object because during class initialization
 769   // it can be held across a java call.
 770   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 771   set_init_lock(mirror(), r);
 772 
 773   // Set protection domain also
 774   set_protection_domain(mirror(), protection_domain());
 775 
 776   // Initialize static fields
 777   InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 778 }
 779 
 780 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
 781                                     Handle module, Handle protection_domain, TRAPS) {
 782   assert(k->java_mirror() == NULL, "should only assign mirror once");
 783   // Use this moment of initialization to cache modifier_flags also,
 784   // to support Class.getModifiers().  Instance classes recalculate
 785   // the cached flags after the class file is parsed, but before the
 786   // class is put into the system dictionary.
 787   int computed_modifiers = k->compute_modifier_flags(CHECK);
 788   k->set_modifier_flags(computed_modifiers);
 789   // Class_klass has to be loaded because it is used to allocate
 790   // the mirror.
 791   if (SystemDictionary::Class_klass_loaded()) {
 792     // Allocate mirror (java.lang.Class instance)
 793     Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 794 
 795     // Setup indirection from mirror->klass
 796     if (!k.is_null()) {
 797       java_lang_Class::set_klass(mirror(), k());
 798     }
 799 
 800     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 801     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 802 
 803     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 804 
 805     // It might also have a component mirror.  This mirror must already exist.
 806     if (k->is_array_klass()) {
 807       Handle comp_mirror;
 808       if (k->is_typeArray_klass()) {
 809         BasicType type = TypeArrayKlass::cast(k())->element_type();
 810         comp_mirror = Universe::java_mirror(type);
 811       } else {
 812         assert(k->is_objArray_klass(), "Must be");
 813         Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
 814         assert(element_klass != NULL, "Must have an element klass");
 815         comp_mirror = element_klass->java_mirror();
 816       }
 817       assert(comp_mirror.not_null(), "must have a mirror");
 818 
 819       // Two-way link between the array klass and its component mirror:
 820       // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
 821       set_component_mirror(mirror(), comp_mirror());
 822       set_array_klass(comp_mirror(), k());
 823     } else {
 824       assert(k->is_instance_klass(), "Must be");
 825 
 826       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 827       if (HAS_PENDING_EXCEPTION) {
 828         // If any of the fields throws an exception like OOM remove the klass field
 829         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 830         // This mirror looks like a primitive type, which logically it is because it
 831         // it represents no class.
 832         java_lang_Class::set_klass(mirror(), NULL);
 833         return;
 834       }
 835     }
 836 
 837     // set the classLoader field in the java_lang_Class instance
 838     assert(class_loader() == k->class_loader(), "should be same");
 839     set_class_loader(mirror(), class_loader());
 840 
 841     // set the module field in the java_lang_Class instance
 842     // This may be null during bootstrap but will get fixed up later on.
 843     set_module(mirror(), module());
 844 
 845     // Setup indirection from klass->mirror last
 846     // after any exceptions can happen during allocations.
 847     if (!k.is_null()) {
 848       k->set_java_mirror(mirror());
 849     }
 850 
 851     // Keep list of classes needing java.base module fixup.
 852     if (!ModuleEntryTable::javabase_defined()) {
 853       if (fixup_module_field_list() == NULL) {
 854         GrowableArray<Klass*>* list =
 855           new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
 856         set_fixup_module_field_list(list);
 857       }
 858       k->class_loader_data()->inc_keep_alive();
 859       fixup_module_field_list()->push(k());
 860     }
 861   } else {
 862     if (fixup_mirror_list() == NULL) {
 863       GrowableArray<Klass*>* list =
 864        new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 865       set_fixup_mirror_list(list);
 866     }
 867     fixup_mirror_list()->push(k());
 868   }
 869 }
 870 
 871 void java_lang_Class::fixup_module_field(KlassHandle k, Handle module) {
 872   assert(_module_offset != 0, "must have been computed already");
 873   java_lang_Class::set_module(k->java_mirror(), module());
 874 }
 875 
 876 int  java_lang_Class::oop_size(oop java_class) {
 877   assert(_oop_size_offset != 0, "must be set");
 878   int size = java_class->int_field(_oop_size_offset);
 879   assert(size > 0, "Oop size must be greater than zero, not %d", size);
 880   return size;
 881 }
 882 
 883 void java_lang_Class::set_oop_size(oop java_class, int size) {
 884   assert(_oop_size_offset != 0, "must be set");
 885   assert(size > 0, "Oop size must be greater than zero, not %d", size);
 886   java_class->int_field_put(_oop_size_offset, size);
 887 }
 888 
 889 int  java_lang_Class::static_oop_field_count(oop java_class) {
 890   assert(_static_oop_field_count_offset != 0, "must be set");
 891   return java_class->int_field(_static_oop_field_count_offset);
 892 }
 893 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
 894   assert(_static_oop_field_count_offset != 0, "must be set");
 895   java_class->int_field_put(_static_oop_field_count_offset, size);
 896 }
 897 
 898 oop java_lang_Class::protection_domain(oop java_class) {
 899   assert(_protection_domain_offset != 0, "must be set");
 900   return java_class->obj_field(_protection_domain_offset);
 901 }
 902 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
 903   assert(_protection_domain_offset != 0, "must be set");
 904   java_class->obj_field_put(_protection_domain_offset, pd);
 905 }
 906 
 907 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
 908   assert(_component_mirror_offset != 0, "must be set");
 909     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
 910   }
 911 oop java_lang_Class::component_mirror(oop java_class) {
 912   assert(_component_mirror_offset != 0, "must be set");
 913   return java_class->obj_field(_component_mirror_offset);
 914 }
 915 
 916 oop java_lang_Class::init_lock(oop java_class) {
 917   assert(_init_lock_offset != 0, "must be set");
 918   return java_class->obj_field(_init_lock_offset);
 919 }
 920 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
 921   assert(_init_lock_offset != 0, "must be set");
 922   java_class->obj_field_put(_init_lock_offset, init_lock);
 923 }
 924 
 925 objArrayOop java_lang_Class::signers(oop java_class) {
 926   assert(_signers_offset != 0, "must be set");
 927   return (objArrayOop)java_class->obj_field(_signers_offset);
 928 }
 929 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
 930   assert(_signers_offset != 0, "must be set");
 931   java_class->obj_field_put(_signers_offset, (oop)signers);
 932 }
 933 
 934 
 935 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
 936   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
 937   if (_class_loader_offset != 0) {
 938     java_class->obj_field_put(_class_loader_offset, loader);
 939   }
 940 }
 941 
 942 oop java_lang_Class::class_loader(oop java_class) {
 943   assert(_class_loader_offset != 0, "must be set");
 944   return java_class->obj_field(_class_loader_offset);
 945 }
 946 
 947 oop java_lang_Class::module(oop java_class) {
 948   assert(_module_offset != 0, "must be set");
 949   return java_class->obj_field(_module_offset);
 950 }
 951 
 952 void java_lang_Class::set_module(oop java_class, oop module) {
 953   assert(_module_offset != 0, "must be set");
 954   java_class->obj_field_put(_module_offset, module);
 955 }
 956 
 957 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
 958   // This should be improved by adding a field at the Java level or by
 959   // introducing a new VM klass (see comment in ClassFileParser)
 960   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
 961   if (type != T_VOID) {
 962     Klass* aklass = Universe::typeArrayKlassObj(type);
 963     assert(aklass != NULL, "correct bootstrap");
 964     set_array_klass(java_class, aklass);
 965   }
 966 #ifdef ASSERT
 967   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
 968   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
 969 #endif
 970   return java_class;
 971 }
 972 
 973 
 974 Klass* java_lang_Class::as_Klass(oop java_class) {
 975   //%note memory_2
 976   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 977   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
 978   assert(k == NULL || k->is_klass(), "type check");
 979   return k;
 980 }
 981 
 982 
 983 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
 984   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 985   java_class->metadata_field_put(_klass_offset, klass);
 986 }
 987 
 988 
 989 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
 990   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 991   Symbol* name = NULL;
 992   bool is_instance = false;
 993   if (is_primitive(java_class)) {
 994     name = vmSymbols::type_signature(primitive_type(java_class));
 995   } else {
 996     Klass* k = as_Klass(java_class);
 997     is_instance = k->is_instance_klass();
 998     name = k->name();
 999   }
1000   if (name == NULL) {
1001     st->print("<null>");
1002     return;
1003   }
1004   if (is_instance)  st->print("L");
1005   st->write((char*) name->base(), (int) name->utf8_length());
1006   if (is_instance)  st->print(";");
1007 }
1008 
1009 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1010   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1011   Symbol* name;
1012   if (is_primitive(java_class)) {
1013     name = vmSymbols::type_signature(primitive_type(java_class));
1014     // Because this can create a new symbol, the caller has to decrement
1015     // the refcount, so make adjustment here and below for symbols returned
1016     // that are not created or incremented due to a successful lookup.
1017     name->increment_refcount();
1018   } else {
1019     Klass* k = as_Klass(java_class);
1020     if (!k->is_instance_klass()) {
1021       name = k->name();
1022       name->increment_refcount();
1023     } else {
1024       ResourceMark rm;
1025       const char* sigstr = k->signature_name();
1026       int         siglen = (int) strlen(sigstr);
1027       if (!intern_if_not_found) {
1028         name = SymbolTable::probe(sigstr, siglen);
1029       } else {
1030         name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1031       }
1032     }
1033   }
1034   return name;
1035 }
1036 
1037 // Returns the Java name for this Java mirror (Resource allocated)
1038 // See Klass::external_name().
1039 // For primitive type Java mirrors, its type name is returned.
1040 const char* java_lang_Class::as_external_name(oop java_class) {
1041   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1042   const char* name = NULL;
1043   if (is_primitive(java_class)) {
1044     name = type2name(primitive_type(java_class));
1045   } else {
1046     name = as_Klass(java_class)->external_name();
1047   }
1048   if (name == NULL) {
1049     name = "<null>";
1050   }
1051   return name;
1052 }
1053 
1054 Klass* java_lang_Class::array_klass(oop java_class) {
1055   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1056   assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1057   return k;
1058 }
1059 
1060 
1061 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1062   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1063   java_class->metadata_field_put(_array_klass_offset, klass);
1064 }
1065 
1066 
1067 bool java_lang_Class::is_primitive(oop java_class) {
1068   // should assert:
1069   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1070   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1071 
1072 #ifdef ASSERT
1073   if (is_primitive) {
1074     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1075     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1076         "Should be either the T_VOID primitive or a java primitive");
1077   }
1078 #endif
1079 
1080   return is_primitive;
1081 }
1082 
1083 
1084 BasicType java_lang_Class::primitive_type(oop java_class) {
1085   assert(java_lang_Class::is_primitive(java_class), "just checking");
1086   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1087   BasicType type = T_VOID;
1088   if (ak != NULL) {
1089     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1090     type = ArrayKlass::cast(ak)->element_type();
1091   } else {
1092     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1093   }
1094   assert(Universe::java_mirror(type) == java_class, "must be consistent");
1095   return type;
1096 }
1097 
1098 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1099   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1100   if (is_primitive(java_class)) {
1101     if (reference_klass != NULL)
1102       (*reference_klass) = NULL;
1103     return primitive_type(java_class);
1104   } else {
1105     if (reference_klass != NULL)
1106       (*reference_klass) = as_Klass(java_class);
1107     return T_OBJECT;
1108   }
1109 }
1110 
1111 
1112 oop java_lang_Class::primitive_mirror(BasicType t) {
1113   oop mirror = Universe::java_mirror(t);
1114   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1115   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1116   return mirror;
1117 }
1118 
1119 bool java_lang_Class::offsets_computed = false;
1120 int  java_lang_Class::classRedefinedCount_offset = -1;
1121 
1122 void java_lang_Class::compute_offsets() {
1123   assert(!offsets_computed, "offsets should be initialized only once");
1124   offsets_computed = true;
1125 
1126   Klass* k = SystemDictionary::Class_klass();
1127   // The classRedefinedCount field is only present starting in 1.5,
1128   // so don't go fatal.
1129   compute_optional_offset(classRedefinedCount_offset,
1130                           k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1131 
1132   // Needs to be optional because the old build runs Queens during bootstrapping
1133   // and jdk8-9 doesn't have coordinated pushes yet.
1134   compute_optional_offset(_class_loader_offset,
1135                  k, vmSymbols::classLoader_name(),
1136                  vmSymbols::classloader_signature());
1137 
1138   compute_offset(_component_mirror_offset,
1139                  k, vmSymbols::componentType_name(),
1140                  vmSymbols::class_signature());
1141 
1142   compute_offset(_module_offset,
1143                  k, vmSymbols::module_name(),
1144                  vmSymbols::module_signature());
1145 
1146   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
1147   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
1148   // GC treats them the same.
1149   _init_lock_offset = _component_mirror_offset;
1150 
1151   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1152 }
1153 
1154 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1155   if (classRedefinedCount_offset == -1) {
1156     // If we don't have an offset for it then just return -1 as a marker.
1157     return -1;
1158   }
1159 
1160   return the_class_mirror->int_field(classRedefinedCount_offset);
1161 }
1162 
1163 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1164   if (classRedefinedCount_offset == -1) {
1165     // If we don't have an offset for it then nothing to set.
1166     return;
1167   }
1168 
1169   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1170 }
1171 
1172 
1173 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1174 //       platform thread structure, and a eetop offset which was used for thread
1175 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1176 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1177 //       instead of the privateInfo_offset.
1178 //
1179 // Note: The stackSize field is only present starting in 1.4.
1180 
1181 int java_lang_Thread::_name_offset = 0;
1182 int java_lang_Thread::_group_offset = 0;
1183 int java_lang_Thread::_contextClassLoader_offset = 0;
1184 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1185 int java_lang_Thread::_priority_offset = 0;
1186 int java_lang_Thread::_eetop_offset = 0;
1187 int java_lang_Thread::_daemon_offset = 0;
1188 int java_lang_Thread::_stillborn_offset = 0;
1189 int java_lang_Thread::_stackSize_offset = 0;
1190 int java_lang_Thread::_tid_offset = 0;
1191 int java_lang_Thread::_thread_status_offset = 0;
1192 int java_lang_Thread::_park_blocker_offset = 0;
1193 int java_lang_Thread::_park_event_offset = 0 ;
1194 
1195 
1196 void java_lang_Thread::compute_offsets() {
1197   assert(_group_offset == 0, "offsets should be initialized only once");
1198 
1199   Klass* k = SystemDictionary::Thread_klass();
1200   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
1201   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
1202   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1203   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1204   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
1205   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
1206   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
1207   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1208   // The stackSize field is only present starting in 1.4, so don't go fatal.
1209   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1210   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1211   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1212   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1213   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1214   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1215   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1216  vmSymbols::long_signature());
1217 }
1218 
1219 
1220 JavaThread* java_lang_Thread::thread(oop java_thread) {
1221   return (JavaThread*)java_thread->address_field(_eetop_offset);
1222 }
1223 
1224 
1225 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1226   java_thread->address_field_put(_eetop_offset, (address)thread);
1227 }
1228 
1229 
1230 oop java_lang_Thread::name(oop java_thread) {
1231   return java_thread->obj_field(_name_offset);
1232 }
1233 
1234 
1235 void java_lang_Thread::set_name(oop java_thread, oop name) {
1236   java_thread->obj_field_put(_name_offset, name);
1237 }
1238 
1239 
1240 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1241   return (ThreadPriority)java_thread->int_field(_priority_offset);
1242 }
1243 
1244 
1245 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1246   java_thread->int_field_put(_priority_offset, priority);
1247 }
1248 
1249 
1250 oop java_lang_Thread::threadGroup(oop java_thread) {
1251   return java_thread->obj_field(_group_offset);
1252 }
1253 
1254 
1255 bool java_lang_Thread::is_stillborn(oop java_thread) {
1256   return java_thread->bool_field(_stillborn_offset) != 0;
1257 }
1258 
1259 
1260 // We never have reason to turn the stillborn bit off
1261 void java_lang_Thread::set_stillborn(oop java_thread) {
1262   java_thread->bool_field_put(_stillborn_offset, true);
1263 }
1264 
1265 
1266 bool java_lang_Thread::is_alive(oop java_thread) {
1267   JavaThread* thr = java_lang_Thread::thread(java_thread);
1268   return (thr != NULL);
1269 }
1270 
1271 
1272 bool java_lang_Thread::is_daemon(oop java_thread) {
1273   return java_thread->bool_field(_daemon_offset) != 0;
1274 }
1275 
1276 
1277 void java_lang_Thread::set_daemon(oop java_thread) {
1278   java_thread->bool_field_put(_daemon_offset, true);
1279 }
1280 
1281 oop java_lang_Thread::context_class_loader(oop java_thread) {
1282   return java_thread->obj_field(_contextClassLoader_offset);
1283 }
1284 
1285 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1286   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1287 }
1288 
1289 
1290 jlong java_lang_Thread::stackSize(oop java_thread) {
1291   if (_stackSize_offset > 0) {
1292     return java_thread->long_field(_stackSize_offset);
1293   } else {
1294     return 0;
1295   }
1296 }
1297 
1298 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1299 void java_lang_Thread::set_thread_status(oop java_thread,
1300                                          java_lang_Thread::ThreadStatus status) {
1301   // The threadStatus is only present starting in 1.5
1302   if (_thread_status_offset > 0) {
1303     java_thread->int_field_put(_thread_status_offset, status);
1304   }
1305 }
1306 
1307 // Read thread status value from threadStatus field in java.lang.Thread java class.
1308 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1309   assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1310          JavaThread::current()->thread_state() == _thread_in_vm,
1311          "Java Thread is not running in vm");
1312   // The threadStatus is only present starting in 1.5
1313   if (_thread_status_offset > 0) {
1314     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1315   } else {
1316     // All we can easily figure out is if it is alive, but that is
1317     // enough info for a valid unknown status.
1318     // These aren't restricted to valid set ThreadStatus values, so
1319     // use JVMTI values and cast.
1320     JavaThread* thr = java_lang_Thread::thread(java_thread);
1321     if (thr == NULL) {
1322       // the thread hasn't run yet or is in the process of exiting
1323       return NEW;
1324     }
1325     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1326   }
1327 }
1328 
1329 
1330 jlong java_lang_Thread::thread_id(oop java_thread) {
1331   // The thread ID field is only present starting in 1.5
1332   if (_tid_offset > 0) {
1333     return java_thread->long_field(_tid_offset);
1334   } else {
1335     return 0;
1336   }
1337 }
1338 
1339 oop java_lang_Thread::park_blocker(oop java_thread) {
1340   assert(JDK_Version::current().supports_thread_park_blocker() &&
1341          _park_blocker_offset != 0, "Must support parkBlocker field");
1342 
1343   if (_park_blocker_offset > 0) {
1344     return java_thread->obj_field(_park_blocker_offset);
1345   }
1346 
1347   return NULL;
1348 }
1349 
1350 jlong java_lang_Thread::park_event(oop java_thread) {
1351   if (_park_event_offset > 0) {
1352     return java_thread->long_field(_park_event_offset);
1353   }
1354   return 0;
1355 }
1356 
1357 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1358   if (_park_event_offset > 0) {
1359     java_thread->long_field_put(_park_event_offset, ptr);
1360     return true;
1361   }
1362   return false;
1363 }
1364 
1365 
1366 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1367   assert(_thread_status_offset != 0, "Must have thread status");
1368   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1369   switch (status) {
1370     case NEW                      : return "NEW";
1371     case RUNNABLE                 : return "RUNNABLE";
1372     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1373     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1374     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1375     case PARKED                   : return "WAITING (parking)";
1376     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1377     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1378     case TERMINATED               : return "TERMINATED";
1379     default                       : return "UNKNOWN";
1380   };
1381 }
1382 int java_lang_ThreadGroup::_parent_offset = 0;
1383 int java_lang_ThreadGroup::_name_offset = 0;
1384 int java_lang_ThreadGroup::_threads_offset = 0;
1385 int java_lang_ThreadGroup::_groups_offset = 0;
1386 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1387 int java_lang_ThreadGroup::_destroyed_offset = 0;
1388 int java_lang_ThreadGroup::_daemon_offset = 0;
1389 int java_lang_ThreadGroup::_nthreads_offset = 0;
1390 int java_lang_ThreadGroup::_ngroups_offset = 0;
1391 
1392 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1393   assert(java_thread_group->is_oop(), "thread group must be oop");
1394   return java_thread_group->obj_field(_parent_offset);
1395 }
1396 
1397 // ("name as oop" accessor is not necessary)
1398 
1399 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1400   oop name = java_thread_group->obj_field(_name_offset);
1401   // ThreadGroup.name can be null
1402   if (name != NULL) {
1403     return java_lang_String::as_utf8_string(name);
1404   }
1405   return NULL;
1406 }
1407 
1408 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1409   assert(java_thread_group->is_oop(), "thread group must be oop");
1410   return java_thread_group->int_field(_nthreads_offset);
1411 }
1412 
1413 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1414   oop threads = java_thread_group->obj_field(_threads_offset);
1415   assert(threads != NULL, "threadgroups should have threads");
1416   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1417   return objArrayOop(threads);
1418 }
1419 
1420 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1421   assert(java_thread_group->is_oop(), "thread group must be oop");
1422   return java_thread_group->int_field(_ngroups_offset);
1423 }
1424 
1425 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1426   oop groups = java_thread_group->obj_field(_groups_offset);
1427   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1428   return objArrayOop(groups);
1429 }
1430 
1431 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1432   assert(java_thread_group->is_oop(), "thread group must be oop");
1433   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1434 }
1435 
1436 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1437   assert(java_thread_group->is_oop(), "thread group must be oop");
1438   return java_thread_group->bool_field(_destroyed_offset) != 0;
1439 }
1440 
1441 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1442   assert(java_thread_group->is_oop(), "thread group must be oop");
1443   return java_thread_group->bool_field(_daemon_offset) != 0;
1444 }
1445 
1446 void java_lang_ThreadGroup::compute_offsets() {
1447   assert(_parent_offset == 0, "offsets should be initialized only once");
1448 
1449   Klass* k = SystemDictionary::ThreadGroup_klass();
1450 
1451   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1452   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1453   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1454   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1455   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1456   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1457   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1458   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1459   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1460 }
1461 
1462 
1463 void java_lang_Throwable::compute_offsets() {
1464   Klass* k = SystemDictionary::Throwable_klass();
1465   compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature());
1466 }
1467 
1468 oop java_lang_Throwable::unassigned_stacktrace() {
1469   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1470   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1471   if (UseCompressedOops) {
1472     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1473   } else {
1474     return oopDesc::load_decode_heap_oop((oop*)addr);
1475   }
1476 }
1477 
1478 oop java_lang_Throwable::backtrace(oop throwable) {
1479   return throwable->obj_field_acquire(backtrace_offset);
1480 }
1481 
1482 
1483 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1484   throwable->release_obj_field_put(backtrace_offset, value);
1485 }
1486 
1487 int java_lang_Throwable::depth(oop throwable) {
1488   return throwable->int_field(depth_offset);
1489 }
1490 
1491 void java_lang_Throwable::set_depth(oop throwable, int value) {
1492   throwable->int_field_put(depth_offset, value);
1493 }
1494 
1495 oop java_lang_Throwable::message(Handle throwable) {
1496   return throwable->obj_field(detailMessage_offset);
1497 }
1498 
1499 
1500 // Return Symbol for detailed_message or NULL
1501 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1502   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1503   oop detailed_message = java_lang_Throwable::message(throwable);
1504   if (detailed_message != NULL) {
1505     return java_lang_String::as_symbol(detailed_message, THREAD);
1506   }
1507   return NULL;
1508 }
1509 
1510 void java_lang_Throwable::set_message(oop throwable, oop value) {
1511   throwable->obj_field_put(detailMessage_offset, value);
1512 }
1513 
1514 
1515 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1516   throwable->obj_field_put(stackTrace_offset, st_element_array);
1517 }
1518 
1519 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1520   set_stacktrace(throwable, NULL);
1521 }
1522 
1523 
1524 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1525   ResourceMark rm;
1526   Klass* k = throwable->klass();
1527   assert(k != NULL, "just checking");
1528   st->print("%s", k->external_name());
1529   oop msg = message(throwable);
1530   if (msg != NULL) {
1531     st->print(": %s", java_lang_String::as_utf8_string(msg));
1532   }
1533 }
1534 
1535 // After this many redefines, the stack trace is unreliable.
1536 const int MAX_VERSION = USHRT_MAX;
1537 
1538 static inline bool version_matches(Method* method, int version) {
1539   assert(version < MAX_VERSION, "version is too big");
1540   return method != NULL && (method->constants()->version() == version);
1541 }
1542 
1543 
1544 // This class provides a simple wrapper over the internal structure of
1545 // exception backtrace to insulate users of the backtrace from needing
1546 // to know what it looks like.
1547 class BacktraceBuilder: public StackObj {
1548  friend class BacktraceIterator;
1549  private:
1550   Handle          _backtrace;
1551   objArrayOop     _head;
1552   typeArrayOop    _methods;
1553   typeArrayOop    _bcis;
1554   objArrayOop     _mirrors;
1555   typeArrayOop    _cprefs; // needed to insulate method name against redefinition
1556   int             _index;
1557   NoSafepointVerifier _nsv;
1558 
1559   enum {
1560     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1561     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1562     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1563     trace_cprefs_offset  = java_lang_Throwable::trace_cprefs_offset,
1564     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1565     trace_size           = java_lang_Throwable::trace_size,
1566     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1567   };
1568 
1569   // get info out of chunks
1570   static typeArrayOop get_methods(objArrayHandle chunk) {
1571     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1572     assert(methods != NULL, "method array should be initialized in backtrace");
1573     return methods;
1574   }
1575   static typeArrayOop get_bcis(objArrayHandle chunk) {
1576     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1577     assert(bcis != NULL, "bci array should be initialized in backtrace");
1578     return bcis;
1579   }
1580   static objArrayOop get_mirrors(objArrayHandle chunk) {
1581     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1582     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1583     return mirrors;
1584   }
1585   static typeArrayOop get_cprefs(objArrayHandle chunk) {
1586     typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1587     assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1588     return cprefs;
1589   }
1590 
1591  public:
1592 
1593   // constructor for new backtrace
1594   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1595     expand(CHECK);
1596     _backtrace = _head;
1597     _index = 0;
1598   }
1599 
1600   BacktraceBuilder(objArrayHandle backtrace) {
1601     _methods = get_methods(backtrace);
1602     _bcis = get_bcis(backtrace);
1603     _mirrors = get_mirrors(backtrace);
1604     _cprefs = get_cprefs(backtrace);
1605     assert(_methods->length() == _bcis->length() &&
1606            _methods->length() == _mirrors->length(),
1607            "method and source information arrays should match");
1608 
1609     // head is the preallocated backtrace
1610     _backtrace = _head = backtrace();
1611     _index = 0;
1612   }
1613 
1614   void expand(TRAPS) {
1615     objArrayHandle old_head(THREAD, _head);
1616     PauseNoSafepointVerifier pnsv(&_nsv);
1617 
1618     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1619     objArrayHandle new_head(THREAD, head);
1620 
1621     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1622     typeArrayHandle new_methods(THREAD, methods);
1623 
1624     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1625     typeArrayHandle new_bcis(THREAD, bcis);
1626 
1627     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1628     objArrayHandle new_mirrors(THREAD, mirrors);
1629 
1630     typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1631     typeArrayHandle new_cprefs(THREAD, cprefs);
1632 
1633     if (!old_head.is_null()) {
1634       old_head->obj_at_put(trace_next_offset, new_head());
1635     }
1636     new_head->obj_at_put(trace_methods_offset, new_methods());
1637     new_head->obj_at_put(trace_bcis_offset, new_bcis());
1638     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1639     new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1640 
1641     _head    = new_head();
1642     _methods = new_methods();
1643     _bcis = new_bcis();
1644     _mirrors = new_mirrors();
1645     _cprefs  = new_cprefs();
1646     _index = 0;
1647   }
1648 
1649   oop backtrace() {
1650     return _backtrace();
1651   }
1652 
1653   inline void push(Method* method, int bci, TRAPS) {
1654     // Smear the -1 bci to 0 since the array only holds unsigned
1655     // shorts.  The later line number lookup would just smear the -1
1656     // to a 0 even if it could be recorded.
1657     if (bci == SynchronizationEntryBCI) bci = 0;
1658 
1659     if (_index >= trace_chunk_size) {
1660       methodHandle mhandle(THREAD, method);
1661       expand(CHECK);
1662       method = mhandle();
1663     }
1664 
1665     _methods->short_at_put(_index, method->orig_method_idnum());
1666     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1667     _cprefs->short_at_put(_index, method->name_index());
1668 
1669     // We need to save the mirrors in the backtrace to keep the class
1670     // from being unloaded while we still have this stack trace.
1671     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1672     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1673     _index++;
1674   }
1675 
1676 };
1677 
1678 struct BacktraceElement : public StackObj {
1679   int _method_id;
1680   int _bci;
1681   int _version;
1682   int _cpref;
1683   Handle _mirror;
1684   BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) :
1685                    _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {}
1686 };
1687 
1688 class BacktraceIterator : public StackObj {
1689   int _index;
1690   objArrayHandle  _result;
1691   objArrayHandle  _mirrors;
1692   typeArrayHandle _methods;
1693   typeArrayHandle _bcis;
1694   typeArrayHandle _cprefs;
1695 
1696   void init(objArrayHandle result, Thread* thread) {
1697     // Get method id, bci, version and mirror from chunk
1698     _result = result;
1699     if (_result.not_null()) {
1700       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1701       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1702       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1703       _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(_result));
1704       _index = 0;
1705     }
1706   }
1707  public:
1708   BacktraceIterator(objArrayHandle result, Thread* thread) {
1709     init(result, thread);
1710     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1711   }
1712 
1713   BacktraceElement next(Thread* thread) {
1714     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1715                         _methods->short_at(_index),
1716                         Backtrace::version_at(_bcis->int_at(_index)),
1717                         Backtrace::bci_at(_bcis->int_at(_index)),
1718                         _cprefs->short_at(_index));
1719     _index++;
1720 
1721     if (_index >= java_lang_Throwable::trace_chunk_size) {
1722       int next_offset = java_lang_Throwable::trace_next_offset;
1723       // Get next chunk
1724       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1725       init(result, thread);
1726     }
1727     return e;
1728   }
1729 
1730   bool repeat() {
1731     return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1732   }
1733 };
1734 
1735 
1736 // Print stack trace element to resource allocated buffer
1737 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1738                                           int version, int bci, int cpref) {
1739   ResourceMark rm;
1740 
1741   // Get strings and string lengths
1742   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1743   const char* klass_name  = holder->external_name();
1744   int buf_len = (int)strlen(klass_name);
1745 
1746   Method* method = holder->method_with_orig_idnum(method_id, version);
1747 
1748   // The method can be NULL if the requested class version is gone
1749   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1750   char* method_name = sym->as_C_string();
1751   buf_len += (int)strlen(method_name);
1752 
1753   char* source_file_name = NULL;
1754   Symbol* source = Backtrace::get_source_file_name(holder, version);
1755   if (source != NULL) {
1756     source_file_name = source->as_C_string();
1757     buf_len += (int)strlen(source_file_name);
1758   }
1759 
1760   char *module_name = NULL, *module_version = NULL;
1761   ModuleEntry* module = holder->module();
1762   if (module->is_named()) {
1763     module_name = module->name()->as_C_string();
1764     buf_len += (int)strlen(module_name);
1765     if (module->version() != NULL) {
1766       module_version = module->version()->as_C_string();
1767       buf_len += (int)strlen(module_version);
1768     }
1769   }
1770 
1771   // Allocate temporary buffer with extra space for formatting and line number
1772   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1773 
1774   // Print stack trace line in buffer
1775   sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1776 
1777   // Print module information
1778   if (module_name != NULL) {
1779     if (module_version != NULL) {
1780       sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1781     } else {
1782       sprintf(buf + (int)strlen(buf), "%s/", module_name);
1783     }
1784   }
1785 
1786   if (!version_matches(method, version)) {
1787     strcat(buf, "Redefined)");
1788   } else {
1789     int line_number = Backtrace::get_line_number(method, bci);
1790     if (line_number == -2) {
1791       strcat(buf, "Native Method)");
1792     } else {
1793       if (source_file_name != NULL && (line_number != -1)) {
1794         // Sourcename and linenumber
1795         sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1796       } else if (source_file_name != NULL) {
1797         // Just sourcename
1798         sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1799       } else {
1800         // Neither sourcename nor linenumber
1801         sprintf(buf + (int)strlen(buf), "Unknown Source)");
1802       }
1803       CompiledMethod* nm = method->code();
1804       if (WizardMode && nm != NULL) {
1805         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1806       }
1807     }
1808   }
1809 
1810   st->print_cr("%s", buf);
1811 }
1812 
1813 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1814   Handle mirror = method->method_holder()->java_mirror();
1815   int method_id = method->orig_method_idnum();
1816   int version = method->constants()->version();
1817   int cpref = method->name_index();
1818   print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref);
1819 }
1820 
1821 /**
1822  * Print the throwable message and its stack trace plus all causes by walking the
1823  * cause chain.  The output looks the same as of Throwable.printStackTrace().
1824  */
1825 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1826   // First, print the message.
1827   print(throwable, st);
1828   st->cr();
1829 
1830   // Now print the stack trace.
1831   Thread* THREAD = Thread::current();
1832   while (throwable.not_null()) {
1833     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1834     if (result.is_null()) {
1835       st->print_raw_cr("\t<<no stack trace available>>");
1836       return;
1837     }
1838     BacktraceIterator iter(result, THREAD);
1839 
1840     while (iter.repeat()) {
1841       BacktraceElement bte = iter.next(THREAD);
1842       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref);
1843     }
1844     {
1845       // Call getCause() which doesn't necessarily return the _cause field.
1846       EXCEPTION_MARK;
1847       JavaValue cause(T_OBJECT);
1848       JavaCalls::call_virtual(&cause,
1849                               throwable,
1850                               KlassHandle(THREAD, throwable->klass()),
1851                               vmSymbols::getCause_name(),
1852                               vmSymbols::void_throwable_signature(),
1853                               THREAD);
1854       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1855       if (HAS_PENDING_EXCEPTION) {
1856         CLEAR_PENDING_EXCEPTION;
1857         throwable = Handle();
1858       } else {
1859         throwable = Handle(THREAD, (oop) cause.get_jobject());
1860         if (throwable.not_null()) {
1861           st->print("Caused by: ");
1862           print(throwable, st);
1863           st->cr();
1864         }
1865       }
1866     }
1867   }
1868 }
1869 
1870 /**
1871  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1872  */
1873 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1874   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1875   JavaValue result(T_VOID);
1876   JavaCalls::call_virtual(&result,
1877                           throwable,
1878                           KlassHandle(THREAD, SystemDictionary::Throwable_klass()),
1879                           vmSymbols::printStackTrace_name(),
1880                           vmSymbols::void_method_signature(),
1881                           THREAD);
1882 }
1883 
1884 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1885   if (!StackTraceInThrowable) return;
1886   ResourceMark rm(THREAD);
1887 
1888   // Start out by clearing the backtrace for this object, in case the VM
1889   // runs out of memory while allocating the stack trace
1890   set_backtrace(throwable(), NULL);
1891   // Clear lazily constructed Java level stacktrace if refilling occurs
1892   // This is unnecessary in 1.7+ but harmless
1893   clear_stacktrace(throwable());
1894 
1895   int max_depth = MaxJavaStackTraceDepth;
1896   JavaThread* thread = (JavaThread*)THREAD;
1897 
1898   BacktraceBuilder bt(CHECK);
1899 
1900   // If there is no Java frame just return the method that was being called
1901   // with bci 0
1902   if (!thread->has_last_Java_frame()) {
1903     if (max_depth >= 1 && method() != NULL) {
1904       bt.push(method(), 0, CHECK);
1905       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1906       set_depth(throwable(), 1);
1907       set_backtrace(throwable(), bt.backtrace());
1908     }
1909     return;
1910   }
1911 
1912   // Instead of using vframe directly, this version of fill_in_stack_trace
1913   // basically handles everything by hand. This significantly improved the
1914   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1915   // See bug 6333838 for  more details.
1916   // The "ASSERT" here is to verify this method generates the exactly same stack
1917   // trace as utilizing vframe.
1918 #ifdef ASSERT
1919   vframeStream st(thread);
1920   methodHandle st_method(THREAD, st.method());
1921 #endif
1922   int total_count = 0;
1923   RegisterMap map(thread, false);
1924   int decode_offset = 0;
1925   CompiledMethod* nm = NULL;
1926   bool skip_fillInStackTrace_check = false;
1927   bool skip_throwableInit_check = false;
1928   bool skip_hidden = !ShowHiddenFrames;
1929 
1930   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1931     Method* method = NULL;
1932     int bci = 0;
1933 
1934     // Compiled java method case.
1935     if (decode_offset != 0) {
1936       DebugInfoReadStream stream(nm, decode_offset);
1937       decode_offset = stream.read_int();
1938       method = (Method*)nm->metadata_at(stream.read_int());
1939       bci = stream.read_bci();
1940     } else {
1941       if (fr.is_first_frame()) break;
1942       address pc = fr.pc();
1943       if (fr.is_interpreted_frame()) {
1944         address bcp = fr.interpreter_frame_bcp();
1945         method = fr.interpreter_frame_method();
1946         bci =  method->bci_from(bcp);
1947         fr = fr.sender(&map);
1948       } else {
1949         CodeBlob* cb = fr.cb();
1950         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1951         // but non nmethod
1952         fr = fr.sender(&map);
1953         if (cb == NULL || !cb->is_compiled()) {
1954           continue;
1955         }
1956         nm = cb->as_compiled_method();
1957         if (nm->method()->is_native()) {
1958           method = nm->method();
1959           bci = 0;
1960         } else {
1961           PcDesc* pd = nm->pc_desc_at(pc);
1962           decode_offset = pd->scope_decode_offset();
1963           // if decode_offset is not equal to 0, it will execute the
1964           // "compiled java method case" at the beginning of the loop.
1965           continue;
1966         }
1967       }
1968     }
1969 #ifdef ASSERT
1970     assert(st_method() == method && st.bci() == bci,
1971            "Wrong stack trace");
1972     st.next();
1973     // vframeStream::method isn't GC-safe so store off a copy
1974     // of the Method* in case we GC.
1975     if (!st.at_end()) {
1976       st_method = st.method();
1977     }
1978 #endif
1979 
1980     // the format of the stacktrace will be:
1981     // - 1 or more fillInStackTrace frames for the exception class (skipped)
1982     // - 0 or more <init> methods for the exception class (skipped)
1983     // - rest of the stack
1984 
1985     if (!skip_fillInStackTrace_check) {
1986       if (method->name() == vmSymbols::fillInStackTrace_name() &&
1987           throwable->is_a(method->method_holder())) {
1988         continue;
1989       }
1990       else {
1991         skip_fillInStackTrace_check = true; // gone past them all
1992       }
1993     }
1994     if (!skip_throwableInit_check) {
1995       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1996 
1997       // skip <init> methods of the exception class and superclasses
1998       // This is simlar to classic VM.
1999       if (method->name() == vmSymbols::object_initializer_name() &&
2000           throwable->is_a(method->method_holder())) {
2001         continue;
2002       } else {
2003         // there are none or we've seen them all - either way stop checking
2004         skip_throwableInit_check = true;
2005       }
2006     }
2007     if (method->is_hidden()) {
2008       if (skip_hidden)  continue;
2009     }
2010     bt.push(method, bci, CHECK);
2011     total_count++;
2012   }
2013 
2014   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2015 
2016   // Put completed stack trace into throwable object
2017   set_backtrace(throwable(), bt.backtrace());
2018   set_depth(throwable(), total_count);
2019 }
2020 
2021 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2022   // No-op if stack trace is disabled
2023   if (!StackTraceInThrowable) {
2024     return;
2025   }
2026 
2027   // Disable stack traces for some preallocated out of memory errors
2028   if (!Universe::should_fill_in_stack_trace(throwable)) {
2029     return;
2030   }
2031 
2032   PRESERVE_EXCEPTION_MARK;
2033 
2034   JavaThread* thread = JavaThread::active();
2035   fill_in_stack_trace(throwable, method, thread);
2036   // ignore exceptions thrown during stack trace filling
2037   CLEAR_PENDING_EXCEPTION;
2038 }
2039 
2040 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2041   // Allocate stack trace - backtrace is created but not filled in
2042 
2043   // No-op if stack trace is disabled
2044   if (!StackTraceInThrowable) return;
2045   BacktraceBuilder bt(CHECK);   // creates a backtrace
2046   set_backtrace(throwable(), bt.backtrace());
2047 }
2048 
2049 
2050 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2051   // Fill in stack trace into preallocated backtrace (no GC)
2052 
2053   // No-op if stack trace is disabled
2054   if (!StackTraceInThrowable) return;
2055 
2056   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2057 
2058   JavaThread* THREAD = JavaThread::current();
2059 
2060   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2061   assert(backtrace.not_null(), "backtrace should have been preallocated");
2062 
2063   ResourceMark rm(THREAD);
2064   vframeStream st(THREAD);
2065 
2066   BacktraceBuilder bt(backtrace);
2067 
2068   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2069   // methods as preallocated errors aren't created by "java" code.
2070 
2071   // fill in as much stack trace as possible
2072   int chunk_count = 0;
2073   for (;!st.at_end(); st.next()) {
2074     bt.push(st.method(), st.bci(), CHECK);
2075     chunk_count++;
2076 
2077     // Bail-out for deep stacks
2078     if (chunk_count >= trace_chunk_size) break;
2079   }
2080   set_depth(throwable(), chunk_count);
2081   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2082 
2083   // We support the Throwable immutability protocol defined for Java 7.
2084   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2085   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2086 }
2087 
2088 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2089                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2090 
2091   if (throwable.is_null() || stack_trace_array_h.is_null()) {
2092     THROW(vmSymbols::java_lang_NullPointerException());
2093   }
2094 
2095   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2096 
2097   if (stack_trace_array_h->length() != depth(throwable())) {
2098     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2099   }
2100 
2101   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2102   BacktraceIterator iter(result, THREAD);
2103 
2104   int index = 0;
2105   while (iter.repeat()) {
2106     BacktraceElement bte = iter.next(THREAD);
2107 
2108     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2109 
2110     if (stack_trace_element.is_null()) {
2111       THROW(vmSymbols::java_lang_NullPointerException());
2112     }
2113 
2114     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2115     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2116 
2117     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2118                                          method,
2119                                          bte._version,
2120                                          bte._bci,
2121                                          bte._cpref, CHECK);
2122   }
2123 }
2124 
2125 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2126   // Allocate java.lang.StackTraceElement instance
2127   Klass* k = SystemDictionary::StackTraceElement_klass();
2128   assert(k != NULL, "must be loaded in 1.4+");
2129   instanceKlassHandle ik (THREAD, k);
2130   if (ik->should_be_initialized()) {
2131     ik->initialize(CHECK_0);
2132   }
2133 
2134   Handle element = ik->allocate_instance_handle(CHECK_0);
2135 
2136   int cpref = method->name_index();
2137   int version = method->constants()->version();
2138   fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0);
2139   return element();
2140 }
2141 
2142 void java_lang_StackTraceElement::fill_in(Handle element,
2143                                           InstanceKlass* holder, const methodHandle& method,
2144                                           int version, int bci, int cpref, TRAPS) {
2145   assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2146 
2147   // Fill in class name
2148   ResourceMark rm(THREAD);
2149   const char* str = holder->external_name();
2150   oop classname = StringTable::intern((char*) str, CHECK);
2151   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2152 
2153   // The method can be NULL if the requested class version is gone
2154   Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref);
2155 
2156   // Fill in method name
2157   oop methodname = StringTable::intern(sym, CHECK);
2158   java_lang_StackTraceElement::set_methodName(element(), methodname);
2159 
2160   // Fill in module name and version
2161   ModuleEntry* module = holder->module();
2162   if (module->is_named()) {
2163     oop module_name = StringTable::intern(module->name(), CHECK);
2164     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2165     oop module_version;
2166     if (module->version() != NULL) {
2167       module_version = StringTable::intern(module->version(), CHECK);
2168     } else {
2169       module_version = NULL;
2170     }
2171     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2172   }
2173 
2174   if (!version_matches(method(), version)) {
2175     // The method was redefined, accurate line number information isn't available
2176     java_lang_StackTraceElement::set_fileName(element(), NULL);
2177     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2178   } else {
2179     // Fill in source file name and line number.
2180     Symbol* source = Backtrace::get_source_file_name(holder, version);
2181     if (ShowHiddenFrames && source == NULL)
2182       source = vmSymbols::unknown_class_name();
2183     oop filename = StringTable::intern(source, CHECK);
2184     java_lang_StackTraceElement::set_fileName(element(), filename);
2185 
2186     int line_number = Backtrace::get_line_number(method, bci);
2187     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2188   }
2189 }
2190 
2191 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2192   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2193   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2194   // we should expand MemberName::name when Throwable uses StackTrace
2195   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2196   return method;
2197 }
2198 
2199 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) {
2200   // set Method* or mid/cpref
2201   oop mname = stackFrame->obj_field(_memberName_offset);
2202   InstanceKlass* ik = method->method_holder();
2203   CallInfo info(method(), ik);
2204   MethodHandles::init_method_MemberName(mname, info);
2205   // set bci
2206   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2207   // method may be redefined; store the version
2208   int version = method->constants()->version();
2209   assert((jushort)version == version, "version should be short");
2210   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2211 }
2212 
2213 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2214   ResourceMark rm(THREAD);
2215   Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset));
2216   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k()));
2217   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2218 
2219   short version = stackFrame->short_field(_version_offset);
2220   short bci = stackFrame->short_field(_bci_offset);
2221   int cpref = method->name_index();
2222   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, cpref, CHECK);
2223 }
2224 
2225 void java_lang_StackFrameInfo::compute_offsets() {
2226   Klass* k = SystemDictionary::StackFrameInfo_klass();
2227   compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(),  vmSymbols::class_signature());
2228   compute_offset(_memberName_offset,     k, vmSymbols::memberName_name(),  vmSymbols::object_signature());
2229   compute_offset(_bci_offset,            k, vmSymbols::bci_name(),         vmSymbols::short_signature());
2230   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2231 }
2232 
2233 void java_lang_LiveStackFrameInfo::compute_offsets() {
2234   Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2235   compute_offset(_monitors_offset,   k, vmSymbols::monitors_name(),    vmSymbols::object_array_signature());
2236   compute_offset(_locals_offset,     k, vmSymbols::locals_name(),      vmSymbols::object_array_signature());
2237   compute_offset(_operands_offset,   k, vmSymbols::operands_name(),    vmSymbols::object_array_signature());
2238 }
2239 
2240 void java_lang_reflect_AccessibleObject::compute_offsets() {
2241   Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2242   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2243 }
2244 
2245 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2246   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2247   return (jboolean) reflect->bool_field(override_offset);
2248 }
2249 
2250 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2251   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2252   reflect->bool_field_put(override_offset, (int) value);
2253 }
2254 
2255 void java_lang_reflect_Method::compute_offsets() {
2256   Klass* k = SystemDictionary::reflect_Method_klass();
2257   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2258   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
2259   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
2260   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2261   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2262   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2263   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2264   // The generic signature and annotations fields are only present in 1.5
2265   signature_offset = -1;
2266   annotations_offset = -1;
2267   parameter_annotations_offset = -1;
2268   annotation_default_offset = -1;
2269   type_annotations_offset = -1;
2270   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2271   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2272   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2273   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
2274   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2275 }
2276 
2277 Handle java_lang_reflect_Method::create(TRAPS) {
2278   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2279   Klass* klass = SystemDictionary::reflect_Method_klass();
2280   // This class is eagerly initialized during VM initialization, since we keep a refence
2281   // to one of the methods
2282   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2283   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2284 }
2285 
2286 oop java_lang_reflect_Method::clazz(oop reflect) {
2287   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288   return reflect->obj_field(clazz_offset);
2289 }
2290 
2291 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2292   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2293    reflect->obj_field_put(clazz_offset, value);
2294 }
2295 
2296 int java_lang_reflect_Method::slot(oop reflect) {
2297   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298   return reflect->int_field(slot_offset);
2299 }
2300 
2301 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2302   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2303   reflect->int_field_put(slot_offset, value);
2304 }
2305 
2306 oop java_lang_reflect_Method::name(oop method) {
2307   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308   return method->obj_field(name_offset);
2309 }
2310 
2311 void java_lang_reflect_Method::set_name(oop method, oop value) {
2312   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313   method->obj_field_put(name_offset, value);
2314 }
2315 
2316 oop java_lang_reflect_Method::return_type(oop method) {
2317   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2318   return method->obj_field(returnType_offset);
2319 }
2320 
2321 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2322   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323   method->obj_field_put(returnType_offset, value);
2324 }
2325 
2326 oop java_lang_reflect_Method::parameter_types(oop method) {
2327   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328   return method->obj_field(parameterTypes_offset);
2329 }
2330 
2331 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2332   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333   method->obj_field_put(parameterTypes_offset, value);
2334 }
2335 
2336 oop java_lang_reflect_Method::exception_types(oop method) {
2337   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338   return method->obj_field(exceptionTypes_offset);
2339 }
2340 
2341 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2342   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2343   method->obj_field_put(exceptionTypes_offset, value);
2344 }
2345 
2346 int java_lang_reflect_Method::modifiers(oop method) {
2347   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2348   return method->int_field(modifiers_offset);
2349 }
2350 
2351 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2352   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2353   method->int_field_put(modifiers_offset, value);
2354 }
2355 
2356 bool java_lang_reflect_Method::has_signature_field() {
2357   return (signature_offset >= 0);
2358 }
2359 
2360 oop java_lang_reflect_Method::signature(oop method) {
2361   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2362   assert(has_signature_field(), "signature field must be present");
2363   return method->obj_field(signature_offset);
2364 }
2365 
2366 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2367   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368   assert(has_signature_field(), "signature field must be present");
2369   method->obj_field_put(signature_offset, value);
2370 }
2371 
2372 bool java_lang_reflect_Method::has_annotations_field() {
2373   return (annotations_offset >= 0);
2374 }
2375 
2376 oop java_lang_reflect_Method::annotations(oop method) {
2377   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2378   assert(has_annotations_field(), "annotations field must be present");
2379   return method->obj_field(annotations_offset);
2380 }
2381 
2382 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2383   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2384   assert(has_annotations_field(), "annotations field must be present");
2385   method->obj_field_put(annotations_offset, value);
2386 }
2387 
2388 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2389   return (parameter_annotations_offset >= 0);
2390 }
2391 
2392 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2393   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2394   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2395   return method->obj_field(parameter_annotations_offset);
2396 }
2397 
2398 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2399   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2400   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2401   method->obj_field_put(parameter_annotations_offset, value);
2402 }
2403 
2404 bool java_lang_reflect_Method::has_annotation_default_field() {
2405   return (annotation_default_offset >= 0);
2406 }
2407 
2408 oop java_lang_reflect_Method::annotation_default(oop method) {
2409   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2410   assert(has_annotation_default_field(), "annotation default field must be present");
2411   return method->obj_field(annotation_default_offset);
2412 }
2413 
2414 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2415   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2416   assert(has_annotation_default_field(), "annotation default field must be present");
2417   method->obj_field_put(annotation_default_offset, value);
2418 }
2419 
2420 bool java_lang_reflect_Method::has_type_annotations_field() {
2421   return (type_annotations_offset >= 0);
2422 }
2423 
2424 oop java_lang_reflect_Method::type_annotations(oop method) {
2425   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2426   assert(has_type_annotations_field(), "type_annotations field must be present");
2427   return method->obj_field(type_annotations_offset);
2428 }
2429 
2430 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2431   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2432   assert(has_type_annotations_field(), "type_annotations field must be present");
2433   method->obj_field_put(type_annotations_offset, value);
2434 }
2435 
2436 void java_lang_reflect_Constructor::compute_offsets() {
2437   Klass* k = SystemDictionary::reflect_Constructor_klass();
2438   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2439   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2440   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2441   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2442   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2443   // The generic signature and annotations fields are only present in 1.5
2444   signature_offset = -1;
2445   annotations_offset = -1;
2446   parameter_annotations_offset = -1;
2447   type_annotations_offset = -1;
2448   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2449   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2450   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2451   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2452 }
2453 
2454 Handle java_lang_reflect_Constructor::create(TRAPS) {
2455   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2456   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2457   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2458   instanceKlassHandle klass (THREAD, k);
2459   // Ensure it is initialized
2460   klass->initialize(CHECK_NH);
2461   return klass->allocate_instance_handle(THREAD);
2462 }
2463 
2464 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2465   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466   return reflect->obj_field(clazz_offset);
2467 }
2468 
2469 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2470   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2471    reflect->obj_field_put(clazz_offset, value);
2472 }
2473 
2474 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2475   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2476   return constructor->obj_field(parameterTypes_offset);
2477 }
2478 
2479 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2480   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2481   constructor->obj_field_put(parameterTypes_offset, value);
2482 }
2483 
2484 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2485   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2486   return constructor->obj_field(exceptionTypes_offset);
2487 }
2488 
2489 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2490   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2491   constructor->obj_field_put(exceptionTypes_offset, value);
2492 }
2493 
2494 int java_lang_reflect_Constructor::slot(oop reflect) {
2495   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2496   return reflect->int_field(slot_offset);
2497 }
2498 
2499 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2500   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2501   reflect->int_field_put(slot_offset, value);
2502 }
2503 
2504 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2505   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2506   return constructor->int_field(modifiers_offset);
2507 }
2508 
2509 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2510   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2511   constructor->int_field_put(modifiers_offset, value);
2512 }
2513 
2514 bool java_lang_reflect_Constructor::has_signature_field() {
2515   return (signature_offset >= 0);
2516 }
2517 
2518 oop java_lang_reflect_Constructor::signature(oop constructor) {
2519   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2520   assert(has_signature_field(), "signature field must be present");
2521   return constructor->obj_field(signature_offset);
2522 }
2523 
2524 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2525   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2526   assert(has_signature_field(), "signature field must be present");
2527   constructor->obj_field_put(signature_offset, value);
2528 }
2529 
2530 bool java_lang_reflect_Constructor::has_annotations_field() {
2531   return (annotations_offset >= 0);
2532 }
2533 
2534 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2535   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2536   assert(has_annotations_field(), "annotations field must be present");
2537   return constructor->obj_field(annotations_offset);
2538 }
2539 
2540 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2541   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2542   assert(has_annotations_field(), "annotations field must be present");
2543   constructor->obj_field_put(annotations_offset, value);
2544 }
2545 
2546 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2547   return (parameter_annotations_offset >= 0);
2548 }
2549 
2550 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2551   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2552   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2553   return method->obj_field(parameter_annotations_offset);
2554 }
2555 
2556 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2557   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2558   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2559   method->obj_field_put(parameter_annotations_offset, value);
2560 }
2561 
2562 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2563   return (type_annotations_offset >= 0);
2564 }
2565 
2566 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2567   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2568   assert(has_type_annotations_field(), "type_annotations field must be present");
2569   return constructor->obj_field(type_annotations_offset);
2570 }
2571 
2572 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2573   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2574   assert(has_type_annotations_field(), "type_annotations field must be present");
2575   constructor->obj_field_put(type_annotations_offset, value);
2576 }
2577 
2578 void java_lang_reflect_Field::compute_offsets() {
2579   Klass* k = SystemDictionary::reflect_Field_klass();
2580   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2581   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
2582   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
2583   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
2584   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2585   // The generic signature and annotations fields are only present in 1.5
2586   signature_offset = -1;
2587   annotations_offset = -1;
2588   type_annotations_offset = -1;
2589   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2590   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
2591   compute_optional_offset(type_annotations_offset,  k, vmSymbols::type_annotations_name(),  vmSymbols::byte_array_signature());
2592 }
2593 
2594 Handle java_lang_reflect_Field::create(TRAPS) {
2595   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2596   Symbol* name = vmSymbols::java_lang_reflect_Field();
2597   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2598   instanceKlassHandle klass (THREAD, k);
2599   // Ensure it is initialized
2600   klass->initialize(CHECK_NH);
2601   return klass->allocate_instance_handle(THREAD);
2602 }
2603 
2604 oop java_lang_reflect_Field::clazz(oop reflect) {
2605   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2606   return reflect->obj_field(clazz_offset);
2607 }
2608 
2609 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2610   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2611    reflect->obj_field_put(clazz_offset, value);
2612 }
2613 
2614 oop java_lang_reflect_Field::name(oop field) {
2615   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2616   return field->obj_field(name_offset);
2617 }
2618 
2619 void java_lang_reflect_Field::set_name(oop field, oop value) {
2620   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2621   field->obj_field_put(name_offset, value);
2622 }
2623 
2624 oop java_lang_reflect_Field::type(oop field) {
2625   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2626   return field->obj_field(type_offset);
2627 }
2628 
2629 void java_lang_reflect_Field::set_type(oop field, oop value) {
2630   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2631   field->obj_field_put(type_offset, value);
2632 }
2633 
2634 int java_lang_reflect_Field::slot(oop reflect) {
2635   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2636   return reflect->int_field(slot_offset);
2637 }
2638 
2639 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2640   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2641   reflect->int_field_put(slot_offset, value);
2642 }
2643 
2644 int java_lang_reflect_Field::modifiers(oop field) {
2645   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2646   return field->int_field(modifiers_offset);
2647 }
2648 
2649 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2650   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2651   field->int_field_put(modifiers_offset, value);
2652 }
2653 
2654 bool java_lang_reflect_Field::has_signature_field() {
2655   return (signature_offset >= 0);
2656 }
2657 
2658 oop java_lang_reflect_Field::signature(oop field) {
2659   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2660   assert(has_signature_field(), "signature field must be present");
2661   return field->obj_field(signature_offset);
2662 }
2663 
2664 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2665   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2666   assert(has_signature_field(), "signature field must be present");
2667   field->obj_field_put(signature_offset, value);
2668 }
2669 
2670 bool java_lang_reflect_Field::has_annotations_field() {
2671   return (annotations_offset >= 0);
2672 }
2673 
2674 oop java_lang_reflect_Field::annotations(oop field) {
2675   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2676   assert(has_annotations_field(), "annotations field must be present");
2677   return field->obj_field(annotations_offset);
2678 }
2679 
2680 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2681   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2682   assert(has_annotations_field(), "annotations field must be present");
2683   field->obj_field_put(annotations_offset, value);
2684 }
2685 
2686 bool java_lang_reflect_Field::has_type_annotations_field() {
2687   return (type_annotations_offset >= 0);
2688 }
2689 
2690 oop java_lang_reflect_Field::type_annotations(oop field) {
2691   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2692   assert(has_type_annotations_field(), "type_annotations field must be present");
2693   return field->obj_field(type_annotations_offset);
2694 }
2695 
2696 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2697   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2698   assert(has_type_annotations_field(), "type_annotations field must be present");
2699   field->obj_field_put(type_annotations_offset, value);
2700 }
2701 
2702 void reflect_ConstantPool::compute_offsets() {
2703   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2704   // This null test can be removed post beta
2705   if (k != NULL) {
2706     // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2707     compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2708   }
2709 }
2710 
2711 void java_lang_reflect_Parameter::compute_offsets() {
2712   Klass* k = SystemDictionary::reflect_Parameter_klass();
2713   if(NULL != k) {
2714     compute_offset(name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
2715     compute_offset(modifiers_offset,   k, vmSymbols::modifiers_name(),   vmSymbols::int_signature());
2716     compute_offset(index_offset,       k, vmSymbols::index_name(),       vmSymbols::int_signature());
2717     compute_offset(executable_offset,  k, vmSymbols::executable_name(),  vmSymbols::executable_signature());
2718   }
2719 }
2720 
2721 Handle java_lang_reflect_Parameter::create(TRAPS) {
2722   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2723   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2724   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2725   instanceKlassHandle klass (THREAD, k);
2726   // Ensure it is initialized
2727   klass->initialize(CHECK_NH);
2728   return klass->allocate_instance_handle(THREAD);
2729 }
2730 
2731 oop java_lang_reflect_Parameter::name(oop param) {
2732   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2733   return param->obj_field(name_offset);
2734 }
2735 
2736 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2737   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2738   param->obj_field_put(name_offset, value);
2739 }
2740 
2741 int java_lang_reflect_Parameter::modifiers(oop param) {
2742   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2743   return param->int_field(modifiers_offset);
2744 }
2745 
2746 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2747   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2748   param->int_field_put(modifiers_offset, value);
2749 }
2750 
2751 int java_lang_reflect_Parameter::index(oop param) {
2752   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2753   return param->int_field(index_offset);
2754 }
2755 
2756 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2757   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2758   param->int_field_put(index_offset, value);
2759 }
2760 
2761 oop java_lang_reflect_Parameter::executable(oop param) {
2762   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2763   return param->obj_field(executable_offset);
2764 }
2765 
2766 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2767   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2768   param->obj_field_put(executable_offset, value);
2769 }
2770 
2771 
2772 int java_lang_reflect_Module::loader_offset;
2773 int java_lang_reflect_Module::name_offset;
2774 int java_lang_reflect_Module::_module_entry_offset = -1;
2775 
2776 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) {
2777   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2778 
2779   Symbol* name = vmSymbols::java_lang_reflect_Module();
2780   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2781   instanceKlassHandle klass (THREAD, k);
2782 
2783   Handle jlrmh = klass->allocate_instance_handle(CHECK_NH);
2784   JavaValue result(T_VOID);
2785   JavaCalls::call_special(&result, jlrmh, KlassHandle(THREAD, klass()),
2786                           vmSymbols::object_initializer_name(),
2787                           vmSymbols::java_lang_reflect_module_init_signature(),
2788                           loader, module_name, CHECK_NH);
2789   return jlrmh;
2790 }
2791 
2792 void java_lang_reflect_Module::compute_offsets() {
2793   Klass* k = SystemDictionary::reflect_Module_klass();
2794   if(NULL != k) {
2795     compute_offset(loader_offset,  k, vmSymbols::loader_name(),  vmSymbols::classloader_signature());
2796     compute_offset(name_offset,    k, vmSymbols::name_name(),    vmSymbols::string_signature());
2797     MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2798   }
2799 }
2800 
2801 
2802 oop java_lang_reflect_Module::loader(oop module) {
2803   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2804   return module->obj_field(loader_offset);
2805 }
2806 
2807 void java_lang_reflect_Module::set_loader(oop module, oop value) {
2808   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2809   module->obj_field_put(loader_offset, value);
2810 }
2811 
2812 oop java_lang_reflect_Module::name(oop module) {
2813   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2814   return module->obj_field(name_offset);
2815 }
2816 
2817 void java_lang_reflect_Module::set_name(oop module, oop value) {
2818   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2819   module->obj_field_put(name_offset, value);
2820 }
2821 
2822 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) {
2823   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2824   assert(module != NULL, "module can't be null");
2825   assert(module->is_oop(), "module must be oop");
2826 
2827   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2828   if (module_entry == NULL) {
2829     // If the inject field containing the ModuleEntry* is null then return the
2830     // class loader's unnamed module.
2831     oop loader = java_lang_reflect_Module::loader(module);
2832     Handle h_loader = Handle(THREAD, loader);
2833     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2834     return loader_cld->modules()->unnamed_module();
2835   }
2836   return module_entry;
2837 }
2838 
2839 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2840   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2841   assert(module != NULL, "module can't be null");
2842   assert(module->is_oop(), "module must be oop");
2843   module->address_field_put(_module_entry_offset, (address)module_entry);
2844 }
2845 
2846 Handle reflect_ConstantPool::create(TRAPS) {
2847   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2848   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2849   instanceKlassHandle klass (THREAD, k);
2850   // Ensure it is initialized
2851   klass->initialize(CHECK_NH);
2852   return klass->allocate_instance_handle(THREAD);
2853 }
2854 
2855 
2856 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2857   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2858   oop mirror = value->pool_holder()->java_mirror();
2859   // Save the mirror to get back the constant pool.
2860   reflect->obj_field_put(_oop_offset, mirror);
2861 }
2862 
2863 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2864   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2865 
2866   oop mirror = reflect->obj_field(_oop_offset);
2867   Klass* k = java_lang_Class::as_Klass(mirror);
2868   assert(k->is_instance_klass(), "Must be");
2869 
2870   // Get the constant pool back from the klass.  Since class redefinition
2871   // merges the new constant pool into the old, this is essentially the
2872   // same constant pool as the original.  If constant pool merging is
2873   // no longer done in the future, this will have to change to save
2874   // the original.
2875   return InstanceKlass::cast(k)->constants();
2876 }
2877 
2878 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2879   Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2880   // This null test can be removed post beta
2881   if (k != NULL) {
2882     compute_offset(_base_offset, k,
2883                    vmSymbols::base_name(), vmSymbols::object_signature());
2884   }
2885 }
2886 
2887 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2888   Klass* k = SystemDictionary::box_klass(type);
2889   if (k == NULL)  return NULL;
2890   instanceKlassHandle h (THREAD, k);
2891   if (!h->is_initialized())  h->initialize(CHECK_0);
2892   return h->allocate_instance(THREAD);
2893 }
2894 
2895 
2896 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2897   oop box = initialize_and_allocate(type, CHECK_0);
2898   if (box == NULL)  return NULL;
2899   switch (type) {
2900     case T_BOOLEAN:
2901       box->bool_field_put(value_offset, value->z);
2902       break;
2903     case T_CHAR:
2904       box->char_field_put(value_offset, value->c);
2905       break;
2906     case T_FLOAT:
2907       box->float_field_put(value_offset, value->f);
2908       break;
2909     case T_DOUBLE:
2910       box->double_field_put(long_value_offset, value->d);
2911       break;
2912     case T_BYTE:
2913       box->byte_field_put(value_offset, value->b);
2914       break;
2915     case T_SHORT:
2916       box->short_field_put(value_offset, value->s);
2917       break;
2918     case T_INT:
2919       box->int_field_put(value_offset, value->i);
2920       break;
2921     case T_LONG:
2922       box->long_field_put(long_value_offset, value->j);
2923       break;
2924     default:
2925       return NULL;
2926   }
2927   return box;
2928 }
2929 
2930 
2931 BasicType java_lang_boxing_object::basic_type(oop box) {
2932   if (box == NULL)  return T_ILLEGAL;
2933   BasicType type = SystemDictionary::box_klass_type(box->klass());
2934   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
2935     return T_ILLEGAL;
2936   return type;
2937 }
2938 
2939 
2940 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2941   BasicType type = SystemDictionary::box_klass_type(box->klass());
2942   switch (type) {
2943   case T_BOOLEAN:
2944     value->z = box->bool_field(value_offset);
2945     break;
2946   case T_CHAR:
2947     value->c = box->char_field(value_offset);
2948     break;
2949   case T_FLOAT:
2950     value->f = box->float_field(value_offset);
2951     break;
2952   case T_DOUBLE:
2953     value->d = box->double_field(long_value_offset);
2954     break;
2955   case T_BYTE:
2956     value->b = box->byte_field(value_offset);
2957     break;
2958   case T_SHORT:
2959     value->s = box->short_field(value_offset);
2960     break;
2961   case T_INT:
2962     value->i = box->int_field(value_offset);
2963     break;
2964   case T_LONG:
2965     value->j = box->long_field(long_value_offset);
2966     break;
2967   default:
2968     return T_ILLEGAL;
2969   } // end switch
2970   return type;
2971 }
2972 
2973 
2974 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2975   BasicType type = SystemDictionary::box_klass_type(box->klass());
2976   switch (type) {
2977   case T_BOOLEAN:
2978     box->bool_field_put(value_offset, value->z);
2979     break;
2980   case T_CHAR:
2981     box->char_field_put(value_offset, value->c);
2982     break;
2983   case T_FLOAT:
2984     box->float_field_put(value_offset, value->f);
2985     break;
2986   case T_DOUBLE:
2987     box->double_field_put(long_value_offset, value->d);
2988     break;
2989   case T_BYTE:
2990     box->byte_field_put(value_offset, value->b);
2991     break;
2992   case T_SHORT:
2993     box->short_field_put(value_offset, value->s);
2994     break;
2995   case T_INT:
2996     box->int_field_put(value_offset, value->i);
2997     break;
2998   case T_LONG:
2999     box->long_field_put(long_value_offset, value->j);
3000     break;
3001   default:
3002     return T_ILLEGAL;
3003   } // end switch
3004   return type;
3005 }
3006 
3007 
3008 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3009   switch (type) {
3010   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3011   case T_CHAR:      st->print("%d", value->c);                      break;
3012   case T_BYTE:      st->print("%d", value->b);                      break;
3013   case T_SHORT:     st->print("%d", value->s);                      break;
3014   case T_INT:       st->print("%d", value->i);                      break;
3015   case T_LONG:      st->print(INT64_FORMAT, value->j);              break;
3016   case T_FLOAT:     st->print("%f", value->f);                      break;
3017   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3018   default:          st->print("type %d?", type);                    break;
3019   }
3020 }
3021 
3022 
3023 // Support for java_lang_ref_Reference
3024 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
3025   InstanceKlass* ik = SystemDictionary::Reference_klass();
3026   address addr = ik->static_field_addr(static_lock_offset);
3027   return (HeapWord*) addr;
3028 }
3029 
3030 oop java_lang_ref_Reference::pending_list_lock() {
3031   InstanceKlass* ik = SystemDictionary::Reference_klass();
3032   address addr = ik->static_field_addr(static_lock_offset);
3033   if (UseCompressedOops) {
3034     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
3035   } else {
3036     return oopDesc::load_decode_heap_oop((oop*)addr);
3037   }
3038 }
3039 
3040 HeapWord *java_lang_ref_Reference::pending_list_addr() {
3041   InstanceKlass* ik = SystemDictionary::Reference_klass();
3042   address addr = ik->static_field_addr(static_pending_offset);
3043   // XXX This might not be HeapWord aligned, almost rather be char *.
3044   return (HeapWord*)addr;
3045 }
3046 
3047 oop java_lang_ref_Reference::pending_list() {
3048   char *addr = (char *)pending_list_addr();
3049   if (UseCompressedOops) {
3050     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
3051   } else {
3052     return oopDesc::load_decode_heap_oop((oop*)addr);
3053   }
3054 }
3055 
3056 
3057 // Support for java_lang_ref_SoftReference
3058 
3059 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3060   return ref->long_field(timestamp_offset);
3061 }
3062 
3063 jlong java_lang_ref_SoftReference::clock() {
3064   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3065   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3066   return *offset;
3067 }
3068 
3069 void java_lang_ref_SoftReference::set_clock(jlong value) {
3070   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3071   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3072   *offset = value;
3073 }
3074 
3075 // Support for java_lang_invoke_DirectMethodHandle
3076 
3077 int java_lang_invoke_DirectMethodHandle::_member_offset;
3078 
3079 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3080   oop member_name = NULL;
3081   bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
3082   assert(is_dmh, "a DirectMethodHandle oop is expected");
3083   if (is_dmh) {
3084     member_name = dmh->obj_field(member_offset_in_bytes());
3085   }
3086   return member_name;
3087 }
3088 
3089 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3090   Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
3091   if (klass_oop != NULL) {
3092     compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3093   }
3094 }
3095 
3096 // Support for java_lang_invoke_MethodHandle
3097 
3098 int java_lang_invoke_MethodHandle::_type_offset;
3099 int java_lang_invoke_MethodHandle::_form_offset;
3100 
3101 int java_lang_invoke_MemberName::_clazz_offset;
3102 int java_lang_invoke_MemberName::_name_offset;
3103 int java_lang_invoke_MemberName::_type_offset;
3104 int java_lang_invoke_MemberName::_flags_offset;
3105 int java_lang_invoke_MemberName::_vmtarget_offset;
3106 int java_lang_invoke_MemberName::_vmloader_offset;
3107 int java_lang_invoke_MemberName::_vmindex_offset;
3108 
3109 int java_lang_invoke_LambdaForm::_vmentry_offset;
3110 
3111 void java_lang_invoke_MethodHandle::compute_offsets() {
3112   Klass* klass_oop = SystemDictionary::MethodHandle_klass();
3113   if (klass_oop != NULL) {
3114     compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3115     compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3116   }
3117 }
3118 
3119 void java_lang_invoke_MemberName::compute_offsets() {
3120   Klass* klass_oop = SystemDictionary::MemberName_klass();
3121   if (klass_oop != NULL) {
3122     compute_offset(_clazz_offset,     klass_oop, vmSymbols::clazz_name(),     vmSymbols::class_signature());
3123     compute_offset(_name_offset,      klass_oop, vmSymbols::name_name(),      vmSymbols::string_signature());
3124     compute_offset(_type_offset,      klass_oop, vmSymbols::type_name(),      vmSymbols::object_signature());
3125     compute_offset(_flags_offset,     klass_oop, vmSymbols::flags_name(),     vmSymbols::int_signature());
3126     MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3127   }
3128 }
3129 
3130 void java_lang_invoke_LambdaForm::compute_offsets() {
3131   Klass* klass_oop = SystemDictionary::LambdaForm_klass();
3132   if (klass_oop != NULL) {
3133     compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3134   }
3135 }
3136 
3137 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3138   return obj != NULL && is_subclass(obj->klass());
3139 }
3140 
3141 
3142 oop java_lang_invoke_MethodHandle::type(oop mh) {
3143   return mh->obj_field(_type_offset);
3144 }
3145 
3146 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3147   mh->obj_field_put(_type_offset, mtype);
3148 }
3149 
3150 oop java_lang_invoke_MethodHandle::form(oop mh) {
3151   assert(_form_offset != 0, "");
3152   return mh->obj_field(_form_offset);
3153 }
3154 
3155 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3156   assert(_form_offset != 0, "");
3157   mh->obj_field_put(_form_offset, lform);
3158 }
3159 
3160 /// MemberName accessors
3161 
3162 oop java_lang_invoke_MemberName::clazz(oop mname) {
3163   assert(is_instance(mname), "wrong type");
3164   return mname->obj_field(_clazz_offset);
3165 }
3166 
3167 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3168   assert(is_instance(mname), "wrong type");
3169   mname->obj_field_put(_clazz_offset, clazz);
3170 }
3171 
3172 oop java_lang_invoke_MemberName::name(oop mname) {
3173   assert(is_instance(mname), "wrong type");
3174   return mname->obj_field(_name_offset);
3175 }
3176 
3177 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3178   assert(is_instance(mname), "wrong type");
3179   mname->obj_field_put(_name_offset, name);
3180 }
3181 
3182 oop java_lang_invoke_MemberName::type(oop mname) {
3183   assert(is_instance(mname), "wrong type");
3184   return mname->obj_field(_type_offset);
3185 }
3186 
3187 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3188   assert(is_instance(mname), "wrong type");
3189   mname->obj_field_put(_type_offset, type);
3190 }
3191 
3192 int java_lang_invoke_MemberName::flags(oop mname) {
3193   assert(is_instance(mname), "wrong type");
3194   return mname->int_field(_flags_offset);
3195 }
3196 
3197 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3198   assert(is_instance(mname), "wrong type");
3199   mname->int_field_put(_flags_offset, flags);
3200 }
3201 
3202 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
3203   assert(is_instance(mname), "wrong type");
3204   return (Metadata*)mname->address_field(_vmtarget_offset);
3205 }
3206 
3207 bool java_lang_invoke_MemberName::is_method(oop mname) {
3208   assert(is_instance(mname), "must be MemberName");
3209   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3210 }
3211 
3212 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
3213   assert(is_instance(mname), "wrong type");
3214   // check the type of the vmtarget
3215   oop dependency = NULL;
3216   if (ref != NULL) {
3217     switch (flags(mname) & (MN_IS_METHOD |
3218                             MN_IS_CONSTRUCTOR |
3219                             MN_IS_FIELD)) {
3220     case MN_IS_METHOD:
3221     case MN_IS_CONSTRUCTOR:
3222       assert(ref->is_method(), "should be a method");
3223       dependency = ((Method*)ref)->method_holder()->java_mirror();
3224       break;
3225     case MN_IS_FIELD:
3226       assert(ref->is_klass(), "should be a class");
3227       dependency = ((Klass*)ref)->java_mirror();
3228       break;
3229     default:
3230       ShouldNotReachHere();
3231     }
3232   }
3233   mname->address_field_put(_vmtarget_offset, (address)ref);
3234   // Add a reference to the loader (actually mirror because anonymous classes will not have
3235   // distinct loaders) to ensure the metadata is kept alive
3236   // This mirror may be different than the one in clazz field.
3237   mname->obj_field_put(_vmloader_offset, dependency);
3238 }
3239 
3240 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3241   assert(is_instance(mname), "wrong type");
3242   return (intptr_t) mname->address_field(_vmindex_offset);
3243 }
3244 
3245 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3246   assert(is_instance(mname), "wrong type");
3247   mname->address_field_put(_vmindex_offset, (address) index);
3248 }
3249 
3250 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3251   assert(is_instance(lform), "wrong type");
3252   return lform->obj_field(_vmentry_offset);
3253 }
3254 
3255 
3256 // Support for java_lang_invoke_MethodType
3257 
3258 int java_lang_invoke_MethodType::_rtype_offset;
3259 int java_lang_invoke_MethodType::_ptypes_offset;
3260 
3261 void java_lang_invoke_MethodType::compute_offsets() {
3262   Klass* k = SystemDictionary::MethodType_klass();
3263   if (k != NULL) {
3264     compute_offset(_rtype_offset,  k, vmSymbols::rtype_name(),  vmSymbols::class_signature());
3265     compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3266   }
3267 }
3268 
3269 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3270   st->print("(");
3271   objArrayOop pts = ptypes(mt);
3272   for (int i = 0, limit = pts->length(); i < limit; i++) {
3273     java_lang_Class::print_signature(pts->obj_at(i), st);
3274   }
3275   st->print(")");
3276   java_lang_Class::print_signature(rtype(mt), st);
3277 }
3278 
3279 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3280   ResourceMark rm;
3281   stringStream buffer(128);
3282   print_signature(mt, &buffer);
3283   const char* sigstr =       buffer.base();
3284   int         siglen = (int) buffer.size();
3285   Symbol *name;
3286   if (!intern_if_not_found) {
3287     name = SymbolTable::probe(sigstr, siglen);
3288   } else {
3289     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3290   }
3291   return name;
3292 }
3293 
3294 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3295   if (mt1 == mt2)
3296     return true;
3297   if (rtype(mt1) != rtype(mt2))
3298     return false;
3299   if (ptype_count(mt1) != ptype_count(mt2))
3300     return false;
3301   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3302     if (ptype(mt1, i) != ptype(mt2, i))
3303       return false;
3304   }
3305   return true;
3306 }
3307 
3308 oop java_lang_invoke_MethodType::rtype(oop mt) {
3309   assert(is_instance(mt), "must be a MethodType");
3310   return mt->obj_field(_rtype_offset);
3311 }
3312 
3313 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3314   assert(is_instance(mt), "must be a MethodType");
3315   return (objArrayOop) mt->obj_field(_ptypes_offset);
3316 }
3317 
3318 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3319   return ptypes(mt)->obj_at(idx);
3320 }
3321 
3322 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3323   return ptypes(mt)->length();
3324 }
3325 
3326 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3327   objArrayOop pts = ptypes(mt);
3328   int count = pts->length();
3329   int slots = 0;
3330   for (int i = 0; i < count; i++) {
3331     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3332     slots += type2size[bt];
3333   }
3334   return slots;
3335 }
3336 
3337 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3338   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3339   return type2size[bt];
3340 }
3341 
3342 
3343 // Support for java_lang_invoke_CallSite
3344 
3345 int java_lang_invoke_CallSite::_target_offset;
3346 int java_lang_invoke_CallSite::_context_offset;
3347 
3348 void java_lang_invoke_CallSite::compute_offsets() {
3349   Klass* k = SystemDictionary::CallSite_klass();
3350   if (k != NULL) {
3351     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3352     compute_offset(_context_offset, k, vmSymbols::context_name(),
3353                    vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3354   }
3355 }
3356 
3357 oop java_lang_invoke_CallSite::context(oop call_site) {
3358   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3359 
3360   oop dep_oop = call_site->obj_field(_context_offset);
3361   return dep_oop;
3362 }
3363 
3364 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3365 
3366 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3367 
3368 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3369   Klass* k = SystemDictionary::Context_klass();
3370   if (k != NULL) {
3371     CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3372   }
3373 }
3374 
3375 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3376   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3377   intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3378   DependencyContext dep_ctx(vmdeps_addr);
3379   return dep_ctx;
3380 }
3381 
3382 // Support for java_security_AccessControlContext
3383 
3384 int java_security_AccessControlContext::_context_offset = 0;
3385 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3386 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3387 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3388 
3389 void java_security_AccessControlContext::compute_offsets() {
3390   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3391   fieldDescriptor fd;
3392   InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3393 
3394   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3395     fatal("Invalid layout of java.security.AccessControlContext");
3396   }
3397   _context_offset = fd.offset();
3398 
3399   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3400     fatal("Invalid layout of java.security.AccessControlContext");
3401   }
3402   _privilegedContext_offset = fd.offset();
3403 
3404   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3405     fatal("Invalid layout of java.security.AccessControlContext");
3406   }
3407   _isPrivileged_offset = fd.offset();
3408 
3409   // The offset may not be present for bootstrapping with older JDK.
3410   if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3411     _isAuthorized_offset = fd.offset();
3412   }
3413 }
3414 
3415 
3416 bool java_security_AccessControlContext::is_authorized(Handle context) {
3417   assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3418   assert(_isAuthorized_offset != -1, "should be set");
3419   return context->bool_field(_isAuthorized_offset) != 0;
3420 }
3421 
3422 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3423   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3424   // Ensure klass is initialized
3425   SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3426   // Allocate result
3427   oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3428   // Fill in values
3429   result->obj_field_put(_context_offset, context());
3430   result->obj_field_put(_privilegedContext_offset, privileged_context());
3431   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3432   // whitelist AccessControlContexts created by the JVM if present
3433   if (_isAuthorized_offset != -1) {
3434     result->bool_field_put(_isAuthorized_offset, true);
3435   }
3436   return result;
3437 }
3438 
3439 
3440 // Support for java_lang_ClassLoader
3441 
3442 bool java_lang_ClassLoader::offsets_computed = false;
3443 int  java_lang_ClassLoader::_loader_data_offset = -1;
3444 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3445 int  java_lang_ClassLoader::unnamedModule_offset = -1;
3446 
3447 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3448     assert(loader != NULL && loader->is_oop(), "loader must be oop");
3449     return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3450 }
3451 
3452 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3453   return *java_lang_ClassLoader::loader_data_addr(loader);
3454 }
3455 
3456 void java_lang_ClassLoader::compute_offsets() {
3457   assert(!offsets_computed, "offsets should be initialized only once");
3458   offsets_computed = true;
3459 
3460   // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3461   Klass* k1 = SystemDictionary::ClassLoader_klass();
3462   compute_optional_offset(parallelCapable_offset,
3463     k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3464 
3465   compute_offset(unnamedModule_offset,
3466     k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature());
3467 
3468   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3469 }
3470 
3471 oop java_lang_ClassLoader::parent(oop loader) {
3472   assert(is_instance(loader), "loader must be oop");
3473   return loader->obj_field(parent_offset);
3474 }
3475 
3476 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3477   assert(is_instance(loader), "loader must be oop");
3478   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3479   oop acl = loader;
3480   debug_only(jint loop_count = 0);
3481   // This loop taken verbatim from ClassLoader.java:
3482   do {
3483     acl = parent(acl);
3484     if (cl == acl) {
3485       return true;
3486     }
3487     assert(++loop_count > 0, "loop_count overflow");
3488   } while (acl != NULL);
3489   return false;
3490 }
3491 
3492 bool java_lang_ClassLoader::is_instance(oop obj) {
3493   return obj != NULL && is_subclass(obj->klass());
3494 }
3495 
3496 
3497 // For class loader classes, parallelCapable defined
3498 // based on non-null field
3499 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3500 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3501   if (parallelCapable_offset == -1) {
3502      // Default for backward compatibility is false
3503      return false;
3504   }
3505   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3506 }
3507 
3508 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3509   // Fix for 4474172; see evaluation for more details
3510   loader = non_reflection_class_loader(loader);
3511 
3512   oop cl = SystemDictionary::java_system_loader();
3513   while(cl != NULL) {
3514     if (cl == loader) return true;
3515     cl = parent(cl);
3516   }
3517   return false;
3518 }
3519 
3520 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3521   if (loader != NULL) {
3522     // See whether this is one of the class loaders associated with
3523     // the generated bytecodes for reflection, and if so, "magically"
3524     // delegate to its parent to prevent class loading from occurring
3525     // in places where applications using reflection didn't expect it.
3526     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3527     // This might be null in non-1.4 JDKs
3528     if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3529       return parent(loader);
3530     }
3531   }
3532   return loader;
3533 }
3534 
3535 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3536   assert(is_instance(loader), "loader must be oop");
3537   return loader->obj_field(unnamedModule_offset);
3538 }
3539 
3540 // Support for java_lang_System
3541 int java_lang_System::in_offset_in_bytes() {
3542   return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3543 }
3544 
3545 
3546 int java_lang_System::out_offset_in_bytes() {
3547   return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3548 }
3549 
3550 
3551 int java_lang_System::err_offset_in_bytes() {
3552   return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3553 }
3554 
3555 
3556 bool java_lang_System::has_security_manager() {
3557   InstanceKlass* ik = SystemDictionary::System_klass();
3558   address addr = ik->static_field_addr(static_security_offset);
3559   if (UseCompressedOops) {
3560     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3561   } else {
3562     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3563   }
3564 }
3565 
3566 int java_lang_Class::_klass_offset;
3567 int java_lang_Class::_array_klass_offset;
3568 int java_lang_Class::_oop_size_offset;
3569 int java_lang_Class::_static_oop_field_count_offset;
3570 int java_lang_Class::_class_loader_offset;
3571 int java_lang_Class::_module_offset;
3572 int java_lang_Class::_protection_domain_offset;
3573 int java_lang_Class::_component_mirror_offset;
3574 int java_lang_Class::_init_lock_offset;
3575 int java_lang_Class::_signers_offset;
3576 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3577 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3578 int java_lang_Throwable::backtrace_offset;
3579 int java_lang_Throwable::detailMessage_offset;
3580 int java_lang_Throwable::stackTrace_offset;
3581 int java_lang_Throwable::depth_offset;
3582 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3583 int java_lang_reflect_AccessibleObject::override_offset;
3584 int java_lang_reflect_Method::clazz_offset;
3585 int java_lang_reflect_Method::name_offset;
3586 int java_lang_reflect_Method::returnType_offset;
3587 int java_lang_reflect_Method::parameterTypes_offset;
3588 int java_lang_reflect_Method::exceptionTypes_offset;
3589 int java_lang_reflect_Method::slot_offset;
3590 int java_lang_reflect_Method::modifiers_offset;
3591 int java_lang_reflect_Method::signature_offset;
3592 int java_lang_reflect_Method::annotations_offset;
3593 int java_lang_reflect_Method::parameter_annotations_offset;
3594 int java_lang_reflect_Method::annotation_default_offset;
3595 int java_lang_reflect_Method::type_annotations_offset;
3596 int java_lang_reflect_Constructor::clazz_offset;
3597 int java_lang_reflect_Constructor::parameterTypes_offset;
3598 int java_lang_reflect_Constructor::exceptionTypes_offset;
3599 int java_lang_reflect_Constructor::slot_offset;
3600 int java_lang_reflect_Constructor::modifiers_offset;
3601 int java_lang_reflect_Constructor::signature_offset;
3602 int java_lang_reflect_Constructor::annotations_offset;
3603 int java_lang_reflect_Constructor::parameter_annotations_offset;
3604 int java_lang_reflect_Constructor::type_annotations_offset;
3605 int java_lang_reflect_Field::clazz_offset;
3606 int java_lang_reflect_Field::name_offset;
3607 int java_lang_reflect_Field::type_offset;
3608 int java_lang_reflect_Field::slot_offset;
3609 int java_lang_reflect_Field::modifiers_offset;
3610 int java_lang_reflect_Field::signature_offset;
3611 int java_lang_reflect_Field::annotations_offset;
3612 int java_lang_reflect_Field::type_annotations_offset;
3613 int java_lang_reflect_Parameter::name_offset;
3614 int java_lang_reflect_Parameter::modifiers_offset;
3615 int java_lang_reflect_Parameter::index_offset;
3616 int java_lang_reflect_Parameter::executable_offset;
3617 int java_lang_boxing_object::value_offset;
3618 int java_lang_boxing_object::long_value_offset;
3619 int java_lang_ref_Reference::referent_offset;
3620 int java_lang_ref_Reference::queue_offset;
3621 int java_lang_ref_Reference::next_offset;
3622 int java_lang_ref_Reference::discovered_offset;
3623 int java_lang_ref_Reference::static_lock_offset;
3624 int java_lang_ref_Reference::static_pending_offset;
3625 int java_lang_ref_Reference::number_of_fake_oop_fields;
3626 int java_lang_ref_SoftReference::timestamp_offset;
3627 int java_lang_ref_SoftReference::static_clock_offset;
3628 int java_lang_ClassLoader::parent_offset;
3629 int java_lang_System::static_in_offset;
3630 int java_lang_System::static_out_offset;
3631 int java_lang_System::static_err_offset;
3632 int java_lang_System::static_security_offset;
3633 int java_lang_StackTraceElement::declaringClass_offset;
3634 int java_lang_StackTraceElement::methodName_offset;
3635 int java_lang_StackTraceElement::fileName_offset;
3636 int java_lang_StackTraceElement::lineNumber_offset;
3637 int java_lang_StackTraceElement::moduleName_offset;
3638 int java_lang_StackTraceElement::moduleVersion_offset;
3639 int java_lang_StackFrameInfo::_declaringClass_offset;
3640 int java_lang_StackFrameInfo::_memberName_offset;
3641 int java_lang_StackFrameInfo::_bci_offset;
3642 int java_lang_StackFrameInfo::_version_offset;
3643 int java_lang_LiveStackFrameInfo::_monitors_offset;
3644 int java_lang_LiveStackFrameInfo::_locals_offset;
3645 int java_lang_LiveStackFrameInfo::_operands_offset;
3646 int java_lang_AssertionStatusDirectives::classes_offset;
3647 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3648 int java_lang_AssertionStatusDirectives::packages_offset;
3649 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3650 int java_lang_AssertionStatusDirectives::deflt_offset;
3651 int java_nio_Buffer::_limit_offset;
3652 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3653 int reflect_ConstantPool::_oop_offset;
3654 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3655 
3656 
3657 // Support for java_lang_StackTraceElement
3658 
3659 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3660   element->obj_field_put(fileName_offset, value);
3661 }
3662 
3663 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3664   element->obj_field_put(declaringClass_offset, value);
3665 }
3666 
3667 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3668   element->obj_field_put(methodName_offset, value);
3669 }
3670 
3671 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3672   element->int_field_put(lineNumber_offset, value);
3673 }
3674 
3675 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3676   element->obj_field_put(moduleName_offset, value);
3677 }
3678 
3679 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3680   element->obj_field_put(moduleVersion_offset, value);
3681 }
3682 
3683 // Support for java_lang_StackFrameInfo
3684 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3685   element->obj_field_put(_declaringClass_offset, value);
3686 }
3687 
3688 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3689   element->short_field_put(_version_offset, value);
3690 }
3691 
3692 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3693   element->int_field_put(_bci_offset, value);
3694 }
3695 
3696 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3697   element->obj_field_put(_monitors_offset, value);
3698 }
3699 
3700 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3701   element->obj_field_put(_locals_offset, value);
3702 }
3703 
3704 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3705   element->obj_field_put(_operands_offset, value);
3706 }
3707 
3708 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3709 
3710 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3711   o->obj_field_put(classes_offset, val);
3712 }
3713 
3714 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3715   o->obj_field_put(classEnabled_offset, val);
3716 }
3717 
3718 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3719   o->obj_field_put(packages_offset, val);
3720 }
3721 
3722 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3723   o->obj_field_put(packageEnabled_offset, val);
3724 }
3725 
3726 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3727   o->bool_field_put(deflt_offset, val);
3728 }
3729 
3730 
3731 // Support for intrinsification of java.nio.Buffer.checkIndex
3732 int java_nio_Buffer::limit_offset() {
3733   return _limit_offset;
3734 }
3735 
3736 
3737 void java_nio_Buffer::compute_offsets() {
3738   Klass* k = SystemDictionary::nio_Buffer_klass();
3739   assert(k != NULL, "must be loaded in 1.4+");
3740   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3741 }
3742 
3743 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3744   if (_owner_offset != 0) return;
3745 
3746   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3747   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3748   compute_offset(_owner_offset, k,
3749                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3750 }
3751 
3752 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3753   assert(_owner_offset != 0, "Must be initialized");
3754   return obj->obj_field(_owner_offset);
3755 }
3756 
3757 // Compute hard-coded offsets
3758 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3759 // are not available to determine the offset_of_static_fields.
3760 void JavaClasses::compute_hard_coded_offsets() {
3761   const int x = heapOopSize;
3762   const int header = instanceOopDesc::base_offset_in_bytes();
3763 
3764   // Throwable Class
3765   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3766   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3767   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3768   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3769 
3770   // java_lang_boxing_object
3771   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3772   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3773 
3774   // java_lang_ref_Reference:
3775   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3776   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3777   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3778   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3779   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3780   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3781   // Artificial fields for java_lang_ref_Reference
3782   // The first field is for the discovered field added in 1.4
3783   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3784 
3785   // java_lang_ref_SoftReference Class
3786   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3787   // Don't multiply static fields because they are always in wordSize units
3788   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3789 
3790   // java_lang_ClassLoader
3791   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3792 
3793   // java_lang_System
3794   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
3795   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3796   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3797   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3798 
3799   // java_lang_StackTraceElement
3800   java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header;
3801   java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header;
3802   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3803   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3804   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3805   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3806   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3807   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3808   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3809   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3810   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3811 
3812 }
3813 
3814 
3815 // Compute non-hard-coded field offsets of all the classes in this file
3816 void JavaClasses::compute_offsets() {
3817   // java_lang_Class::compute_offsets was called earlier in bootstrap
3818   java_lang_ClassLoader::compute_offsets();
3819   java_lang_Throwable::compute_offsets();
3820   java_lang_Thread::compute_offsets();
3821   java_lang_ThreadGroup::compute_offsets();
3822   java_lang_invoke_MethodHandle::compute_offsets();
3823   java_lang_invoke_DirectMethodHandle::compute_offsets();
3824   java_lang_invoke_MemberName::compute_offsets();
3825   java_lang_invoke_LambdaForm::compute_offsets();
3826   java_lang_invoke_MethodType::compute_offsets();
3827   java_lang_invoke_CallSite::compute_offsets();
3828   java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3829   java_security_AccessControlContext::compute_offsets();
3830   // Initialize reflection classes. The layouts of these classes
3831   // changed with the new reflection implementation in JDK 1.4, and
3832   // since the Universe doesn't know what JDK version it is until this
3833   // point we defer computation of these offsets until now.
3834   java_lang_reflect_AccessibleObject::compute_offsets();
3835   java_lang_reflect_Method::compute_offsets();
3836   java_lang_reflect_Constructor::compute_offsets();
3837   java_lang_reflect_Field::compute_offsets();
3838   java_nio_Buffer::compute_offsets();
3839   reflect_ConstantPool::compute_offsets();
3840   reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3841   java_lang_reflect_Parameter::compute_offsets();
3842   java_lang_reflect_Module::compute_offsets();
3843   java_lang_StackFrameInfo::compute_offsets();
3844   java_lang_LiveStackFrameInfo::compute_offsets();
3845 
3846   // generated interpreter code wants to know about the offsets we just computed:
3847   AbstractAssembler::update_delayed_values();
3848 }
3849 
3850 #ifndef PRODUCT
3851 
3852 // These functions exist to assert the validity of hard-coded field offsets to guard
3853 // against changes in the class files
3854 
3855 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3856   EXCEPTION_MARK;
3857   fieldDescriptor fd;
3858   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3859   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3860   instanceKlassHandle h_klass (THREAD, k);
3861   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3862   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3863   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3864     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3865     return false;
3866   }
3867   if (fd.is_static()) {
3868     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3869     return false;
3870   }
3871   if (fd.offset() == hardcoded_offset ) {
3872     return true;
3873   } else {
3874     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3875                   klass_name, field_name, hardcoded_offset, fd.offset());
3876     return false;
3877   }
3878 }
3879 
3880 
3881 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3882   EXCEPTION_MARK;
3883   fieldDescriptor fd;
3884   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3885   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3886   instanceKlassHandle h_klass (THREAD, k);
3887   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3888   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3889   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3890     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3891     return false;
3892   }
3893   if (!fd.is_static()) {
3894     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3895     return false;
3896   }
3897   if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3898     return true;
3899   } else {
3900     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());
3901     return false;
3902   }
3903 }
3904 
3905 
3906 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3907   EXCEPTION_MARK;
3908   fieldDescriptor fd;
3909   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3910   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3911   instanceKlassHandle h_klass (THREAD, k);
3912   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3913   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3914   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3915     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3916     return false;
3917   }
3918   if (!fd.is_static() || !fd.has_initial_value()) {
3919     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3920     return false;
3921   }
3922   if (!fd.initial_value_tag().is_int()) {
3923     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3924     return false;
3925   }
3926   jint field_value = fd.int_initial_value();
3927   if (field_value == hardcoded_constant) {
3928     return true;
3929   } else {
3930     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);
3931     return false;
3932   }
3933 }
3934 
3935 
3936 // Check the hard-coded field offsets of all the classes in this file
3937 
3938 void JavaClasses::check_offsets() {
3939   bool valid = true;
3940   HandleMark hm;
3941 
3942 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3943   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3944 
3945 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3946   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3947 
3948 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3949   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3950 
3951 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3952   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3953 
3954   // java.lang.String
3955 
3956   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3957   if (java_lang_String::has_hash_field()) {
3958     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3959   }
3960   if (java_lang_String::has_coder_field()) {
3961     CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3962   }
3963 
3964   // java.lang.Class
3965 
3966   // Fake fields
3967   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3968   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3969 
3970   // java.lang.Throwable
3971 
3972   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3973   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3974   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3975   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
3976 
3977   // Boxed primitive objects (java_lang_boxing_object)
3978 
3979   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3980   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3981   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3982   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3983   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3984   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3985   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3986   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3987 
3988   // java.lang.ClassLoader
3989 
3990   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,        "Ljava/lang/ClassLoader;");
3991 
3992   // java.lang.System
3993 
3994   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3995   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3996   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3997   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3998 
3999   // java.lang.StackTraceElement
4000 
4001   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
4002   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
4003   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement,   fileName, "Ljava/lang/String;");
4004   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
4005 
4006   // java.lang.ref.Reference
4007 
4008   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4009   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4010   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4011   // Fake field
4012   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4013   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
4014   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
4015 
4016   // java.lang.ref.SoftReference
4017 
4018   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
4019   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
4020 
4021   // java.lang.AssertionStatusDirectives
4022   //
4023   // The CheckAssertionStatusDirectives boolean can be removed from here and
4024   // globals.hpp after the AssertionStatusDirectives class has been integrated
4025   // into merlin "for some time."  Without it, the vm will fail with early
4026   // merlin builds.
4027 
4028   if (CheckAssertionStatusDirectives) {
4029     const char* nm = "java/lang/AssertionStatusDirectives";
4030     const char* sig = "[Ljava/lang/String;";
4031     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
4032     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
4033     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
4034     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
4035     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
4036   }
4037 
4038   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4039 }
4040 
4041 #endif // PRODUCT
4042 
4043 int InjectedField::compute_offset() {
4044   InstanceKlass* ik = InstanceKlass::cast(klass());
4045   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4046     if (!may_be_java && !fs.access_flags().is_internal()) {
4047       // Only look at injected fields
4048       continue;
4049     }
4050     if (fs.name() == name() && fs.signature() == signature()) {
4051       return fs.offset();
4052     }
4053   }
4054   ResourceMark rm;
4055   tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
4056 #ifndef PRODUCT
4057   ik->print();
4058   tty->print_cr("all fields:");
4059   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4060     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4061   }
4062 #endif //PRODUCT
4063   vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4064   return -1;
4065 }
4066 
4067 void javaClasses_init() {
4068   JavaClasses::compute_offsets();
4069   JavaClasses::check_offsets();
4070   FilteredFieldsMap::initialize();  // must be done after computing offsets.
4071 }