1 /*
   2  * Copyright (c) 1997, 2017, 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_offset(hash_offset,            k, vmSymbols::hash_name(),   vmSymbols::int_signature());
 167   compute_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   {
 322     ResourceMark rm;
 323     const char* expected = symbol->as_utf8();
 324     char* actual = as_utf8_string(h_obj());
 325     if (strncmp(expected, actual, utf8_len) != 0) {
 326       tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
 327       ShouldNotReachHere();
 328     }
 329   }
 330 #endif
 331 
 332   return h_obj;
 333 }
 334 
 335 // Converts a C string to a Java String based on current encoding
 336 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 337   assert(str != NULL, "bad arguments");
 338 
 339   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 340   static to_java_string_fn_t _to_java_string_fn = NULL;
 341 
 342   if (_to_java_string_fn == NULL) {
 343     void *lib_handle = os::native_java_library();
 344     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 345     if (_to_java_string_fn == NULL) {
 346       fatal("NewStringPlatform missing");
 347     }
 348   }
 349 
 350   jstring js = NULL;
 351   { JavaThread* thread = (JavaThread*)THREAD;
 352     assert(thread->is_Java_thread(), "must be java thread");
 353     HandleMark hm(thread);
 354     ThreadToNativeFromVM ttn(thread);
 355     js = (_to_java_string_fn)(thread->jni_environment(), str);
 356   }
 357   return Handle(THREAD, JNIHandles::resolve(js));
 358 }
 359 
 360 // Converts a Java String to a native C string that can be used for
 361 // native OS calls.
 362 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 363   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 364   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 365 
 366   if (_to_platform_string_fn == NULL) {
 367     void *lib_handle = os::native_java_library();
 368     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 369     if (_to_platform_string_fn == NULL) {
 370       fatal("GetStringPlatformChars missing");
 371     }
 372   }
 373 
 374   char *native_platform_string;
 375   { JavaThread* thread = (JavaThread*)THREAD;
 376     assert(thread->is_Java_thread(), "must be java thread");
 377     JNIEnv *env = thread->jni_environment();
 378     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 379     bool is_copy;
 380     HandleMark hm(thread);
 381     ThreadToNativeFromVM ttn(thread);
 382     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 383     assert(is_copy == JNI_TRUE, "is_copy value changed");
 384     JNIHandles::destroy_local(js);
 385   }
 386   return native_platform_string;
 387 }
 388 
 389 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 390   oop          obj    = java_string();
 391   // Typical usage is to convert all '/' to '.' in string.
 392   typeArrayOop value  = java_lang_String::value(obj);
 393   int          length = java_lang_String::length(obj);
 394   bool      is_latin1 = java_lang_String::is_latin1(obj);
 395 
 396   // First check if any from_char exist
 397   int index; // Declared outside, used later
 398   for (index = 0; index < length; index++) {
 399     jchar c = !is_latin1 ? value->char_at(index) :
 400                   ((jchar) value->byte_at(index)) & 0xff;
 401     if (c == from_char) {
 402       break;
 403     }
 404   }
 405   if (index == length) {
 406     // No from_char, so do not copy.
 407     return java_string;
 408   }
 409 
 410   // Check if result string will be latin1
 411   bool to_is_latin1 = false;
 412 
 413   // Replacement char must be latin1
 414   if (CompactStrings && UNICODE::is_latin1(to_char)) {
 415     if (is_latin1) {
 416       // Source string is latin1 as well
 417       to_is_latin1 = true;
 418     } else if (!UNICODE::is_latin1(from_char)) {
 419       // We are replacing an UTF16 char. Scan string to
 420       // check if result can be latin1 encoded.
 421       to_is_latin1 = true;
 422       for (index = 0; index < length; index++) {
 423         jchar c = value->char_at(index);
 424         if (c != from_char && !UNICODE::is_latin1(c)) {
 425           to_is_latin1 = false;
 426           break;
 427         }
 428       }
 429     }
 430   }
 431 
 432   // Create new UNICODE (or byte) buffer. Must handlize value because GC
 433   // may happen during String and char array creation.
 434   typeArrayHandle h_value(THREAD, value);
 435   Handle string = basic_create(length, to_is_latin1, CHECK_NH);
 436   typeArrayOop from_buffer = h_value();
 437   typeArrayOop to_buffer = java_lang_String::value(string());
 438 
 439   // Copy contents
 440   for (index = 0; index < length; index++) {
 441     jchar c = (!is_latin1) ? from_buffer->char_at(index) :
 442                     ((jchar) from_buffer->byte_at(index)) & 0xff;
 443     if (c == from_char) {
 444       c = to_char;
 445     }
 446     if (!to_is_latin1) {
 447       to_buffer->char_at_put(index, c);
 448     } else {
 449       to_buffer->byte_at_put(index, (jbyte) c);
 450     }
 451   }
 452   return string;
 453 }
 454 
 455 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 456   typeArrayOop value  = java_lang_String::value(java_string);
 457                length = java_lang_String::length(java_string);
 458   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 459 
 460   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 461   if (result != NULL) {
 462     if (!is_latin1) {
 463       for (int index = 0; index < length; index++) {
 464         result[index] = value->char_at(index);
 465       }
 466     } else {
 467       for (int index = 0; index < length; index++) {
 468         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 469       }
 470     }
 471   } else {
 472     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 473   }
 474   return result;
 475 }
 476 
 477 unsigned int java_lang_String::hash_code(oop java_string) {
 478   int          length = java_lang_String::length(java_string);
 479   // Zero length string will hash to zero with String.hashCode() function.
 480   if (length == 0) return 0;
 481 
 482   typeArrayOop value  = java_lang_String::value(java_string);
 483   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 484 
 485   if (is_latin1) {
 486     return java_lang_String::hash_code(value->byte_at_addr(0), length);
 487   } else {
 488     return java_lang_String::hash_code(value->char_at_addr(0), length);
 489   }
 490 }
 491 
 492 char* java_lang_String::as_quoted_ascii(oop java_string) {
 493   typeArrayOop value  = java_lang_String::value(java_string);
 494   int          length = java_lang_String::length(java_string);
 495   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 496 
 497   if (length == 0) return NULL;
 498 
 499   char* result;
 500   int result_length;
 501   if (!is_latin1) {
 502     jchar* base = value->char_at_addr(0);
 503     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 504     result = NEW_RESOURCE_ARRAY(char, result_length);
 505     UNICODE::as_quoted_ascii(base, length, result, result_length);
 506   } else {
 507     jbyte* base = value->byte_at_addr(0);
 508     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 509     result = NEW_RESOURCE_ARRAY(char, result_length);
 510     UNICODE::as_quoted_ascii(base, length, result, result_length);
 511   }
 512   assert(result_length >= length + 1, "must not be shorter");
 513   assert(result_length == (int)strlen(result) + 1, "must match");
 514   return result;
 515 }
 516 
 517 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
 518   typeArrayOop value  = java_lang_String::value(java_string);
 519   int          length = java_lang_String::length(java_string);
 520   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 521   if (!is_latin1) {
 522     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 523     Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
 524     return sym;
 525   } else {
 526     ResourceMark rm;
 527     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 528     const char* base = UNICODE::as_utf8(position, length);
 529     Symbol* sym = SymbolTable::lookup(base, length, THREAD);
 530     return sym;
 531   }
 532 }
 533 
 534 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 535   typeArrayOop value  = java_lang_String::value(java_string);
 536   int          length = java_lang_String::length(java_string);
 537   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 538   if (!is_latin1) {
 539     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 540     return SymbolTable::probe_unicode(base, length);
 541   } else {
 542     ResourceMark rm;
 543     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 544     const char* base = UNICODE::as_utf8(position, length);
 545     return SymbolTable::probe(base, length);
 546   }
 547 }
 548 
 549 int java_lang_String::utf8_length(oop java_string) {
 550   typeArrayOop value  = java_lang_String::value(java_string);
 551   int          length = java_lang_String::length(java_string);
 552   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 553   if (length == 0) {
 554     return 0;
 555   }
 556   if (!is_latin1) {
 557     return UNICODE::utf8_length(value->char_at_addr(0), length);
 558   } else {
 559     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 560   }
 561 }
 562 
 563 char* java_lang_String::as_utf8_string(oop java_string) {
 564   typeArrayOop value  = java_lang_String::value(java_string);
 565   int          length = java_lang_String::length(java_string);
 566   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 567   if (!is_latin1) {
 568     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 569     return UNICODE::as_utf8(position, length);
 570   } else {
 571     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 572     return UNICODE::as_utf8(position, length);
 573   }
 574 }
 575 
 576 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 577   typeArrayOop value  = java_lang_String::value(java_string);
 578   int          length = java_lang_String::length(java_string);
 579   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 580   if (!is_latin1) {
 581     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 582     return UNICODE::as_utf8(position, length, buf, buflen);
 583   } else {
 584     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 585     return UNICODE::as_utf8(position, length, buf, buflen);
 586   }
 587 }
 588 
 589 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 590   typeArrayOop value  = java_lang_String::value(java_string);
 591   int          length = java_lang_String::length(java_string);
 592   assert(start + len <= length, "just checking");
 593   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 594   if (!is_latin1) {
 595     jchar* position = value->char_at_addr(start);
 596     return UNICODE::as_utf8(position, len);
 597   } else {
 598     jbyte* position = value->byte_at_addr(start);
 599     return UNICODE::as_utf8(position, len);
 600   }
 601 }
 602 
 603 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
 604   typeArrayOop value  = java_lang_String::value(java_string);
 605   int          length = java_lang_String::length(java_string);
 606   assert(start + len <= length, "just checking");
 607   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 608   if (!is_latin1) {
 609     jchar* position = value->char_at_addr(start);
 610     return UNICODE::as_utf8(position, len, buf, buflen);
 611   } else {
 612     jbyte* position = value->byte_at_addr(start);
 613     return UNICODE::as_utf8(position, len, buf, buflen);
 614   }
 615 }
 616 
 617 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
 618   assert(java_string->klass() == SystemDictionary::String_klass(),
 619          "must be java_string");
 620   typeArrayOop value  = java_lang_String::value(java_string);
 621   int          length = java_lang_String::length(java_string);
 622   if (length != len) {
 623     return false;
 624   }
 625   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 626   if (!is_latin1) {
 627     for (int i = 0; i < len; i++) {
 628       if (value->char_at(i) != chars[i]) {
 629         return false;
 630       }
 631     }
 632   } else {
 633     for (int i = 0; i < len; i++) {
 634       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 635         return false;
 636       }
 637     }
 638   }
 639   return true;
 640 }
 641 
 642 bool java_lang_String::equals(oop str1, oop str2) {
 643   assert(str1->klass() == SystemDictionary::String_klass(),
 644          "must be java String");
 645   assert(str2->klass() == SystemDictionary::String_klass(),
 646          "must be java String");
 647   typeArrayOop value1  = java_lang_String::value(str1);
 648   int          length1 = java_lang_String::length(str1);
 649   bool       is_latin1 = java_lang_String::is_latin1(str1);
 650   typeArrayOop value2  = java_lang_String::value(str2);
 651   int          length2 = java_lang_String::length(str2);
 652   bool       is_latin2 = java_lang_String::is_latin1(str2);
 653 
 654   if ((length1 != length2) || (is_latin1 != is_latin2)) {
 655     // Strings of different size or with different
 656     // coders are never equal.
 657     return false;
 658   }
 659   int blength1 = value1->length();
 660   for (int i = 0; i < value1->length(); i++) {
 661     if (value1->byte_at(i) != value2->byte_at(i)) {
 662       return false;
 663     }
 664   }
 665   return true;
 666 }
 667 
 668 void java_lang_String::print(oop java_string, outputStream* st) {
 669   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 670   typeArrayOop value  = java_lang_String::value(java_string);
 671 
 672   if (value == NULL) {
 673     // This can happen if, e.g., printing a String
 674     // object before its initializer has been called
 675     st->print("NULL");
 676     return;
 677   }
 678 
 679   int length = java_lang_String::length(java_string);
 680   bool is_latin1 = java_lang_String::is_latin1(java_string);
 681 
 682   st->print("\"");
 683   for (int index = 0; index < length; index++) {
 684     st->print("%c", (!is_latin1) ?  value->char_at(index) :
 685                            ((jchar) value->byte_at(index)) & 0xff );
 686   }
 687   st->print("\"");
 688 }
 689 
 690 
 691 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 692   assert(mirror.not_null() && fd->is_static(), "just checking");
 693   if (fd->has_initial_value()) {
 694     BasicType t = fd->field_type();
 695     switch (t) {
 696       case T_BYTE:
 697         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 698               break;
 699       case T_BOOLEAN:
 700         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 701               break;
 702       case T_CHAR:
 703         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 704               break;
 705       case T_SHORT:
 706         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 707               break;
 708       case T_INT:
 709         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 710         break;
 711       case T_FLOAT:
 712         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 713         break;
 714       case T_DOUBLE:
 715         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 716         break;
 717       case T_LONG:
 718         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 719         break;
 720       case T_OBJECT:
 721         {
 722           #ifdef ASSERT
 723           TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
 724           assert(fd->signature() == sym, "just checking");
 725           #endif
 726           oop string = fd->string_initial_value(CHECK);
 727           mirror()->obj_field_put(fd->offset(), string);
 728         }
 729         break;
 730       default:
 731         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 732                   "Illegal ConstantValue attribute in class file");
 733     }
 734   }
 735 }
 736 
 737 
 738 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 739   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 740 
 741   // If the offset was read from the shared archive, it was fixed up already
 742   if (!k->is_shared()) {
 743     if (k->is_instance_klass()) {
 744       // During bootstrap, java.lang.Class wasn't loaded so static field
 745       // offsets were computed without the size added it.  Go back and
 746       // update all the static field offsets to included the size.
 747         for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
 748         if (fs.access_flags().is_static()) {
 749           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 750           fs.set_offset(real_offset);
 751         }
 752       }
 753     }
 754   }
 755   create_mirror(k, Handle(), Handle(), Handle(), CHECK);
 756 }
 757 
 758 void java_lang_Class::initialize_mirror_fields(Klass* k,
 759                                                Handle mirror,
 760                                                Handle protection_domain,
 761                                                TRAPS) {
 762   // Allocate a simple java object for a lock.
 763   // This needs to be a java object because during class initialization
 764   // it can be held across a java call.
 765   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 766   set_init_lock(mirror(), r);
 767 
 768   // Set protection domain also
 769   set_protection_domain(mirror(), protection_domain());
 770 
 771   // Initialize static fields
 772   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 773 }
 774 
 775 // Set the java.lang.reflect.Module module field in the java_lang_Class mirror
 776 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
 777   if (module.is_null()) {
 778     // During startup, the module may be NULL only if java.base has not been defined yet.
 779     // Put the class on the fixup_module_list to patch later when the java.lang.reflect.Module
 780     // for java.base is known.
 781     assert(!Universe::is_module_initialized(), "Incorrect java.lang.reflect.Module pre module system initialization");
 782 
 783     bool javabase_was_defined = false;
 784     {
 785       MutexLocker m1(Module_lock, THREAD);
 786       // Keep list of classes needing java.base module fixup
 787       if (!ModuleEntryTable::javabase_defined()) {
 788         if (fixup_module_field_list() == NULL) {
 789           GrowableArray<Klass*>* list =
 790             new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
 791           set_fixup_module_field_list(list);
 792         }
 793         k->class_loader_data()->inc_keep_alive();
 794         fixup_module_field_list()->push(k);
 795       } else {
 796         javabase_was_defined = true;
 797       }
 798     }
 799 
 800     // If java.base was already defined then patch this particular class with java.base.
 801     if (javabase_was_defined) {
 802       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 803       assert(javabase_entry != NULL && javabase_entry->module() != NULL,
 804              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 805       Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module()));
 806       set_module(mirror(), javabase_handle());
 807     }
 808   } else {
 809     assert(Universe::is_module_initialized() ||
 810            (ModuleEntryTable::javabase_defined() &&
 811             (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))),
 812            "Incorrect java.lang.reflect.Module specification while creating mirror");
 813     set_module(mirror(), module());
 814   }
 815 }
 816 
 817 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
 818                                     Handle module, Handle protection_domain, TRAPS) {
 819   assert(k->java_mirror() == NULL, "should only assign mirror once");
 820   // Use this moment of initialization to cache modifier_flags also,
 821   // to support Class.getModifiers().  Instance classes recalculate
 822   // the cached flags after the class file is parsed, but before the
 823   // class is put into the system dictionary.
 824   int computed_modifiers = k->compute_modifier_flags(CHECK);
 825   k->set_modifier_flags(computed_modifiers);
 826   // Class_klass has to be loaded because it is used to allocate
 827   // the mirror.
 828   if (SystemDictionary::Class_klass_loaded()) {
 829     // Allocate mirror (java.lang.Class instance)
 830     oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 831     Handle mirror(THREAD, mirror_oop);
 832 
 833     // Setup indirection from mirror->klass
 834     if (k != NULL) {
 835       java_lang_Class::set_klass(mirror(), k);
 836     }
 837 
 838     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 839     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 840 
 841     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 842 
 843     // It might also have a component mirror.  This mirror must already exist.
 844     if (k->is_array_klass()) {
 845       oop comp_mirror;
 846       if (k->is_typeArray_klass()) {
 847         BasicType type = TypeArrayKlass::cast(k)->element_type();
 848         comp_mirror = Universe::java_mirror(type);
 849       } else {
 850         assert(k->is_objArray_klass(), "Must be");
 851         Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
 852         assert(element_klass != NULL, "Must have an element klass");
 853         comp_mirror = element_klass->java_mirror();
 854       }
 855       assert(comp_mirror != NULL, "must have a mirror");
 856 
 857       // Two-way link between the array klass and its component mirror:
 858       // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
 859       set_component_mirror(mirror(), comp_mirror);
 860       set_array_klass(comp_mirror, k);
 861     } else {
 862       assert(k->is_instance_klass(), "Must be");
 863 
 864       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 865       if (HAS_PENDING_EXCEPTION) {
 866         // If any of the fields throws an exception like OOM remove the klass field
 867         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 868         // This mirror looks like a primitive type, which logically it is because it
 869         // it represents no class.
 870         java_lang_Class::set_klass(mirror(), NULL);
 871         return;
 872       }
 873     }
 874 
 875     // set the classLoader field in the java_lang_Class instance
 876     assert(class_loader() == k->class_loader(), "should be same");
 877     set_class_loader(mirror(), class_loader());
 878 
 879     // set the module field in the java_lang_Class instance
 880     set_mirror_module_field(k, mirror, module, THREAD);
 881 
 882     // Setup indirection from klass->mirror last
 883     // after any exceptions can happen during allocations.
 884     if (k != NULL) {
 885       k->set_java_mirror(mirror());
 886     }
 887   } else {
 888     if (fixup_mirror_list() == NULL) {
 889       GrowableArray<Klass*>* list =
 890        new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 891       set_fixup_mirror_list(list);
 892     }
 893     fixup_mirror_list()->push(k);
 894   }
 895 }
 896 
 897 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
 898   assert(_module_offset != 0, "must have been computed already");
 899   java_lang_Class::set_module(k->java_mirror(), module());
 900 }
 901 
 902 int  java_lang_Class::oop_size(oop java_class) {
 903   assert(_oop_size_offset != 0, "must be set");
 904   int size = java_class->int_field(_oop_size_offset);
 905   assert(size > 0, "Oop size must be greater than zero, not %d", size);
 906   return size;
 907 }
 908 
 909 void java_lang_Class::set_oop_size(oop java_class, int size) {
 910   assert(_oop_size_offset != 0, "must be set");
 911   assert(size > 0, "Oop size must be greater than zero, not %d", size);
 912   java_class->int_field_put(_oop_size_offset, size);
 913 }
 914 
 915 int  java_lang_Class::static_oop_field_count(oop java_class) {
 916   assert(_static_oop_field_count_offset != 0, "must be set");
 917   return java_class->int_field(_static_oop_field_count_offset);
 918 }
 919 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
 920   assert(_static_oop_field_count_offset != 0, "must be set");
 921   java_class->int_field_put(_static_oop_field_count_offset, size);
 922 }
 923 
 924 oop java_lang_Class::protection_domain(oop java_class) {
 925   assert(_protection_domain_offset != 0, "must be set");
 926   return java_class->obj_field(_protection_domain_offset);
 927 }
 928 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
 929   assert(_protection_domain_offset != 0, "must be set");
 930   java_class->obj_field_put(_protection_domain_offset, pd);
 931 }
 932 
 933 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
 934   assert(_component_mirror_offset != 0, "must be set");
 935     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
 936   }
 937 oop java_lang_Class::component_mirror(oop java_class) {
 938   assert(_component_mirror_offset != 0, "must be set");
 939   return java_class->obj_field(_component_mirror_offset);
 940 }
 941 
 942 oop java_lang_Class::init_lock(oop java_class) {
 943   assert(_init_lock_offset != 0, "must be set");
 944   return java_class->obj_field(_init_lock_offset);
 945 }
 946 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
 947   assert(_init_lock_offset != 0, "must be set");
 948   java_class->obj_field_put(_init_lock_offset, init_lock);
 949 }
 950 
 951 objArrayOop java_lang_Class::signers(oop java_class) {
 952   assert(_signers_offset != 0, "must be set");
 953   return (objArrayOop)java_class->obj_field(_signers_offset);
 954 }
 955 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
 956   assert(_signers_offset != 0, "must be set");
 957   java_class->obj_field_put(_signers_offset, (oop)signers);
 958 }
 959 
 960 
 961 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
 962   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
 963   if (_class_loader_offset != 0) {
 964     java_class->obj_field_put(_class_loader_offset, loader);
 965   }
 966 }
 967 
 968 oop java_lang_Class::class_loader(oop java_class) {
 969   assert(_class_loader_offset != 0, "must be set");
 970   return java_class->obj_field(_class_loader_offset);
 971 }
 972 
 973 oop java_lang_Class::module(oop java_class) {
 974   assert(_module_offset != 0, "must be set");
 975   return java_class->obj_field(_module_offset);
 976 }
 977 
 978 void java_lang_Class::set_module(oop java_class, oop module) {
 979   assert(_module_offset != 0, "must be set");
 980   java_class->obj_field_put(_module_offset, module);
 981 }
 982 
 983 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
 984   // This should be improved by adding a field at the Java level or by
 985   // introducing a new VM klass (see comment in ClassFileParser)
 986   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
 987   if (type != T_VOID) {
 988     Klass* aklass = Universe::typeArrayKlassObj(type);
 989     assert(aklass != NULL, "correct bootstrap");
 990     set_array_klass(java_class, aklass);
 991   }
 992 #ifdef ASSERT
 993   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
 994   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
 995 #endif
 996   return java_class;
 997 }
 998 
 999 
1000 Klass* java_lang_Class::as_Klass(oop java_class) {
1001   //%note memory_2
1002   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1003   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1004   assert(k == NULL || k->is_klass(), "type check");
1005   return k;
1006 }
1007 
1008 
1009 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1010   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1011   java_class->metadata_field_put(_klass_offset, klass);
1012 }
1013 
1014 
1015 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1016   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1017   Symbol* name = NULL;
1018   bool is_instance = false;
1019   if (is_primitive(java_class)) {
1020     name = vmSymbols::type_signature(primitive_type(java_class));
1021   } else {
1022     Klass* k = as_Klass(java_class);
1023     is_instance = k->is_instance_klass();
1024     name = k->name();
1025   }
1026   if (name == NULL) {
1027     st->print("<null>");
1028     return;
1029   }
1030   if (is_instance)  st->print("L");
1031   st->write((char*) name->base(), (int) name->utf8_length());
1032   if (is_instance)  st->print(";");
1033 }
1034 
1035 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1036   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1037   Symbol* name;
1038   if (is_primitive(java_class)) {
1039     name = vmSymbols::type_signature(primitive_type(java_class));
1040     // Because this can create a new symbol, the caller has to decrement
1041     // the refcount, so make adjustment here and below for symbols returned
1042     // that are not created or incremented due to a successful lookup.
1043     name->increment_refcount();
1044   } else {
1045     Klass* k = as_Klass(java_class);
1046     if (!k->is_instance_klass()) {
1047       name = k->name();
1048       name->increment_refcount();
1049     } else {
1050       ResourceMark rm;
1051       const char* sigstr = k->signature_name();
1052       int         siglen = (int) strlen(sigstr);
1053       if (!intern_if_not_found) {
1054         name = SymbolTable::probe(sigstr, siglen);
1055       } else {
1056         name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1057       }
1058     }
1059   }
1060   return name;
1061 }
1062 
1063 // Returns the Java name for this Java mirror (Resource allocated)
1064 // See Klass::external_name().
1065 // For primitive type Java mirrors, its type name is returned.
1066 const char* java_lang_Class::as_external_name(oop java_class) {
1067   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1068   const char* name = NULL;
1069   if (is_primitive(java_class)) {
1070     name = type2name(primitive_type(java_class));
1071   } else {
1072     name = as_Klass(java_class)->external_name();
1073   }
1074   if (name == NULL) {
1075     name = "<null>";
1076   }
1077   return name;
1078 }
1079 
1080 Klass* java_lang_Class::array_klass(oop java_class) {
1081   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1082   assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1083   return k;
1084 }
1085 
1086 
1087 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
1088   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1089   java_class->metadata_field_put(_array_klass_offset, klass);
1090 }
1091 
1092 
1093 bool java_lang_Class::is_primitive(oop java_class) {
1094   // should assert:
1095   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1096   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1097 
1098 #ifdef ASSERT
1099   if (is_primitive) {
1100     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1101     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1102         "Should be either the T_VOID primitive or a java primitive");
1103   }
1104 #endif
1105 
1106   return is_primitive;
1107 }
1108 
1109 
1110 BasicType java_lang_Class::primitive_type(oop java_class) {
1111   assert(java_lang_Class::is_primitive(java_class), "just checking");
1112   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1113   BasicType type = T_VOID;
1114   if (ak != NULL) {
1115     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1116     type = ArrayKlass::cast(ak)->element_type();
1117   } else {
1118     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1119   }
1120   assert(Universe::java_mirror(type) == java_class, "must be consistent");
1121   return type;
1122 }
1123 
1124 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1125   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1126   if (is_primitive(java_class)) {
1127     if (reference_klass != NULL)
1128       (*reference_klass) = NULL;
1129     return primitive_type(java_class);
1130   } else {
1131     if (reference_klass != NULL)
1132       (*reference_klass) = as_Klass(java_class);
1133     return T_OBJECT;
1134   }
1135 }
1136 
1137 
1138 oop java_lang_Class::primitive_mirror(BasicType t) {
1139   oop mirror = Universe::java_mirror(t);
1140   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1141   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1142   return mirror;
1143 }
1144 
1145 bool java_lang_Class::offsets_computed = false;
1146 int  java_lang_Class::classRedefinedCount_offset = -1;
1147 
1148 void java_lang_Class::compute_offsets() {
1149   assert(!offsets_computed, "offsets should be initialized only once");
1150   offsets_computed = true;
1151 
1152   Klass* k = SystemDictionary::Class_klass();
1153   // The classRedefinedCount field is only present starting in 1.5,
1154   // so don't go fatal.
1155   compute_optional_offset(classRedefinedCount_offset,
1156                           k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
1157 
1158   // Needs to be optional because the old build runs Queens during bootstrapping
1159   // and jdk8-9 doesn't have coordinated pushes yet.
1160   compute_optional_offset(_class_loader_offset,
1161                  k, vmSymbols::classLoader_name(),
1162                  vmSymbols::classloader_signature());
1163 
1164   compute_offset(_component_mirror_offset,
1165                  k, vmSymbols::componentType_name(),
1166                  vmSymbols::class_signature());
1167 
1168   compute_offset(_module_offset,
1169                  k, vmSymbols::module_name(),
1170                  vmSymbols::module_signature());
1171 
1172   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
1173   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
1174   // GC treats them the same.
1175   _init_lock_offset = _component_mirror_offset;
1176 
1177   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1178 }
1179 
1180 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1181   if (classRedefinedCount_offset == -1) {
1182     // If we don't have an offset for it then just return -1 as a marker.
1183     return -1;
1184   }
1185 
1186   return the_class_mirror->int_field(classRedefinedCount_offset);
1187 }
1188 
1189 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1190   if (classRedefinedCount_offset == -1) {
1191     // If we don't have an offset for it then nothing to set.
1192     return;
1193   }
1194 
1195   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1196 }
1197 
1198 
1199 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1200 //       platform thread structure, and a eetop offset which was used for thread
1201 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1202 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1203 //       instead of the privateInfo_offset.
1204 //
1205 // Note: The stackSize field is only present starting in 1.4.
1206 
1207 int java_lang_Thread::_name_offset = 0;
1208 int java_lang_Thread::_group_offset = 0;
1209 int java_lang_Thread::_contextClassLoader_offset = 0;
1210 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1211 int java_lang_Thread::_priority_offset = 0;
1212 int java_lang_Thread::_eetop_offset = 0;
1213 int java_lang_Thread::_daemon_offset = 0;
1214 int java_lang_Thread::_stillborn_offset = 0;
1215 int java_lang_Thread::_stackSize_offset = 0;
1216 int java_lang_Thread::_tid_offset = 0;
1217 int java_lang_Thread::_thread_status_offset = 0;
1218 int java_lang_Thread::_park_blocker_offset = 0;
1219 int java_lang_Thread::_park_event_offset = 0 ;
1220 
1221 
1222 void java_lang_Thread::compute_offsets() {
1223   assert(_group_offset == 0, "offsets should be initialized only once");
1224 
1225   Klass* k = SystemDictionary::Thread_klass();
1226   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
1227   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
1228   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
1229   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
1230   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
1231   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
1232   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
1233   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
1234   // The stackSize field is only present starting in 1.4, so don't go fatal.
1235   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
1236   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
1237   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
1238   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
1239   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
1240   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
1241   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
1242  vmSymbols::long_signature());
1243 }
1244 
1245 
1246 JavaThread* java_lang_Thread::thread(oop java_thread) {
1247   return (JavaThread*)java_thread->address_field(_eetop_offset);
1248 }
1249 
1250 
1251 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1252   java_thread->address_field_put(_eetop_offset, (address)thread);
1253 }
1254 
1255 
1256 oop java_lang_Thread::name(oop java_thread) {
1257   return java_thread->obj_field(_name_offset);
1258 }
1259 
1260 
1261 void java_lang_Thread::set_name(oop java_thread, oop name) {
1262   java_thread->obj_field_put(_name_offset, name);
1263 }
1264 
1265 
1266 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1267   return (ThreadPriority)java_thread->int_field(_priority_offset);
1268 }
1269 
1270 
1271 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1272   java_thread->int_field_put(_priority_offset, priority);
1273 }
1274 
1275 
1276 oop java_lang_Thread::threadGroup(oop java_thread) {
1277   return java_thread->obj_field(_group_offset);
1278 }
1279 
1280 
1281 bool java_lang_Thread::is_stillborn(oop java_thread) {
1282   return java_thread->bool_field(_stillborn_offset) != 0;
1283 }
1284 
1285 
1286 // We never have reason to turn the stillborn bit off
1287 void java_lang_Thread::set_stillborn(oop java_thread) {
1288   java_thread->bool_field_put(_stillborn_offset, true);
1289 }
1290 
1291 
1292 bool java_lang_Thread::is_alive(oop java_thread) {
1293   JavaThread* thr = java_lang_Thread::thread(java_thread);
1294   return (thr != NULL);
1295 }
1296 
1297 
1298 bool java_lang_Thread::is_daemon(oop java_thread) {
1299   return java_thread->bool_field(_daemon_offset) != 0;
1300 }
1301 
1302 
1303 void java_lang_Thread::set_daemon(oop java_thread) {
1304   java_thread->bool_field_put(_daemon_offset, true);
1305 }
1306 
1307 oop java_lang_Thread::context_class_loader(oop java_thread) {
1308   return java_thread->obj_field(_contextClassLoader_offset);
1309 }
1310 
1311 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1312   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1313 }
1314 
1315 
1316 jlong java_lang_Thread::stackSize(oop java_thread) {
1317   if (_stackSize_offset > 0) {
1318     return java_thread->long_field(_stackSize_offset);
1319   } else {
1320     return 0;
1321   }
1322 }
1323 
1324 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1325 void java_lang_Thread::set_thread_status(oop java_thread,
1326                                          java_lang_Thread::ThreadStatus status) {
1327   // The threadStatus is only present starting in 1.5
1328   if (_thread_status_offset > 0) {
1329     java_thread->int_field_put(_thread_status_offset, status);
1330   }
1331 }
1332 
1333 // Read thread status value from threadStatus field in java.lang.Thread java class.
1334 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1335   assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1336          JavaThread::current()->thread_state() == _thread_in_vm,
1337          "Java Thread is not running in vm");
1338   // The threadStatus is only present starting in 1.5
1339   if (_thread_status_offset > 0) {
1340     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1341   } else {
1342     // All we can easily figure out is if it is alive, but that is
1343     // enough info for a valid unknown status.
1344     // These aren't restricted to valid set ThreadStatus values, so
1345     // use JVMTI values and cast.
1346     JavaThread* thr = java_lang_Thread::thread(java_thread);
1347     if (thr == NULL) {
1348       // the thread hasn't run yet or is in the process of exiting
1349       return NEW;
1350     }
1351     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1352   }
1353 }
1354 
1355 
1356 jlong java_lang_Thread::thread_id(oop java_thread) {
1357   // The thread ID field is only present starting in 1.5
1358   if (_tid_offset > 0) {
1359     return java_thread->long_field(_tid_offset);
1360   } else {
1361     return 0;
1362   }
1363 }
1364 
1365 oop java_lang_Thread::park_blocker(oop java_thread) {
1366   assert(JDK_Version::current().supports_thread_park_blocker() &&
1367          _park_blocker_offset != 0, "Must support parkBlocker field");
1368 
1369   if (_park_blocker_offset > 0) {
1370     return java_thread->obj_field(_park_blocker_offset);
1371   }
1372 
1373   return NULL;
1374 }
1375 
1376 jlong java_lang_Thread::park_event(oop java_thread) {
1377   if (_park_event_offset > 0) {
1378     return java_thread->long_field(_park_event_offset);
1379   }
1380   return 0;
1381 }
1382 
1383 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1384   if (_park_event_offset > 0) {
1385     java_thread->long_field_put(_park_event_offset, ptr);
1386     return true;
1387   }
1388   return false;
1389 }
1390 
1391 
1392 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1393   assert(_thread_status_offset != 0, "Must have thread status");
1394   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1395   switch (status) {
1396     case NEW                      : return "NEW";
1397     case RUNNABLE                 : return "RUNNABLE";
1398     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1399     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1400     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1401     case PARKED                   : return "WAITING (parking)";
1402     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1403     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1404     case TERMINATED               : return "TERMINATED";
1405     default                       : return "UNKNOWN";
1406   };
1407 }
1408 int java_lang_ThreadGroup::_parent_offset = 0;
1409 int java_lang_ThreadGroup::_name_offset = 0;
1410 int java_lang_ThreadGroup::_threads_offset = 0;
1411 int java_lang_ThreadGroup::_groups_offset = 0;
1412 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1413 int java_lang_ThreadGroup::_destroyed_offset = 0;
1414 int java_lang_ThreadGroup::_daemon_offset = 0;
1415 int java_lang_ThreadGroup::_nthreads_offset = 0;
1416 int java_lang_ThreadGroup::_ngroups_offset = 0;
1417 
1418 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1419   assert(java_thread_group->is_oop(), "thread group must be oop");
1420   return java_thread_group->obj_field(_parent_offset);
1421 }
1422 
1423 // ("name as oop" accessor is not necessary)
1424 
1425 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1426   oop name = java_thread_group->obj_field(_name_offset);
1427   // ThreadGroup.name can be null
1428   if (name != NULL) {
1429     return java_lang_String::as_utf8_string(name);
1430   }
1431   return NULL;
1432 }
1433 
1434 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1435   assert(java_thread_group->is_oop(), "thread group must be oop");
1436   return java_thread_group->int_field(_nthreads_offset);
1437 }
1438 
1439 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1440   oop threads = java_thread_group->obj_field(_threads_offset);
1441   assert(threads != NULL, "threadgroups should have threads");
1442   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1443   return objArrayOop(threads);
1444 }
1445 
1446 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1447   assert(java_thread_group->is_oop(), "thread group must be oop");
1448   return java_thread_group->int_field(_ngroups_offset);
1449 }
1450 
1451 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1452   oop groups = java_thread_group->obj_field(_groups_offset);
1453   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1454   return objArrayOop(groups);
1455 }
1456 
1457 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1458   assert(java_thread_group->is_oop(), "thread group must be oop");
1459   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1460 }
1461 
1462 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1463   assert(java_thread_group->is_oop(), "thread group must be oop");
1464   return java_thread_group->bool_field(_destroyed_offset) != 0;
1465 }
1466 
1467 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1468   assert(java_thread_group->is_oop(), "thread group must be oop");
1469   return java_thread_group->bool_field(_daemon_offset) != 0;
1470 }
1471 
1472 void java_lang_ThreadGroup::compute_offsets() {
1473   assert(_parent_offset == 0, "offsets should be initialized only once");
1474 
1475   Klass* k = SystemDictionary::ThreadGroup_klass();
1476 
1477   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1478   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1479   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1480   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1481   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1482   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1483   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1484   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1485   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1486 }
1487 
1488 
1489 void java_lang_Throwable::compute_offsets() {
1490   Klass* k = SystemDictionary::Throwable_klass();
1491   compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature());
1492 }
1493 
1494 oop java_lang_Throwable::unassigned_stacktrace() {
1495   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1496   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1497   if (UseCompressedOops) {
1498     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1499   } else {
1500     return oopDesc::load_decode_heap_oop((oop*)addr);
1501   }
1502 }
1503 
1504 oop java_lang_Throwable::backtrace(oop throwable) {
1505   return throwable->obj_field_acquire(backtrace_offset);
1506 }
1507 
1508 
1509 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1510   throwable->release_obj_field_put(backtrace_offset, value);
1511 }
1512 
1513 int java_lang_Throwable::depth(oop throwable) {
1514   return throwable->int_field(depth_offset);
1515 }
1516 
1517 void java_lang_Throwable::set_depth(oop throwable, int value) {
1518   throwable->int_field_put(depth_offset, value);
1519 }
1520 
1521 oop java_lang_Throwable::message(oop throwable) {
1522   return throwable->obj_field(detailMessage_offset);
1523 }
1524 
1525 
1526 // Return Symbol for detailed_message or NULL
1527 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1528   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1529   oop detailed_message = java_lang_Throwable::message(throwable);
1530   if (detailed_message != NULL) {
1531     return java_lang_String::as_symbol(detailed_message, THREAD);
1532   }
1533   return NULL;
1534 }
1535 
1536 void java_lang_Throwable::set_message(oop throwable, oop value) {
1537   throwable->obj_field_put(detailMessage_offset, value);
1538 }
1539 
1540 
1541 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1542   throwable->obj_field_put(stackTrace_offset, st_element_array);
1543 }
1544 
1545 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1546   set_stacktrace(throwable, NULL);
1547 }
1548 
1549 
1550 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1551   ResourceMark rm;
1552   Klass* k = throwable->klass();
1553   assert(k != NULL, "just checking");
1554   st->print("%s", k->external_name());
1555   oop msg = message(throwable);
1556   if (msg != NULL) {
1557     st->print(": %s", java_lang_String::as_utf8_string(msg));
1558   }
1559 }
1560 
1561 // After this many redefines, the stack trace is unreliable.
1562 const int MAX_VERSION = USHRT_MAX;
1563 
1564 static inline bool version_matches(Method* method, int version) {
1565   assert(version < MAX_VERSION, "version is too big");
1566   return method != NULL && (method->constants()->version() == version);
1567 }
1568 
1569 
1570 // This class provides a simple wrapper over the internal structure of
1571 // exception backtrace to insulate users of the backtrace from needing
1572 // to know what it looks like.
1573 class BacktraceBuilder: public StackObj {
1574  friend class BacktraceIterator;
1575  private:
1576   Handle          _backtrace;
1577   objArrayOop     _head;
1578   typeArrayOop    _methods;
1579   typeArrayOop    _bcis;
1580   objArrayOop     _mirrors;
1581   typeArrayOop    _names; // needed to insulate method name against redefinition
1582   int             _index;
1583   NoSafepointVerifier _nsv;
1584 
1585   enum {
1586     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1587     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1588     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1589     trace_names_offset   = java_lang_Throwable::trace_names_offset,
1590     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1591     trace_size           = java_lang_Throwable::trace_size,
1592     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1593   };
1594 
1595   // get info out of chunks
1596   static typeArrayOop get_methods(objArrayHandle chunk) {
1597     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1598     assert(methods != NULL, "method array should be initialized in backtrace");
1599     return methods;
1600   }
1601   static typeArrayOop get_bcis(objArrayHandle chunk) {
1602     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1603     assert(bcis != NULL, "bci array should be initialized in backtrace");
1604     return bcis;
1605   }
1606   static objArrayOop get_mirrors(objArrayHandle chunk) {
1607     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1608     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1609     return mirrors;
1610   }
1611   static typeArrayOop get_names(objArrayHandle chunk) {
1612     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1613     assert(names != NULL, "names array should be initialized in backtrace");
1614     return names;
1615   }
1616 
1617  public:
1618 
1619   // constructor for new backtrace
1620   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
1621     expand(CHECK);
1622     _backtrace = Handle(THREAD, _head);
1623     _index = 0;
1624   }
1625 
1626   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1627     _methods = get_methods(backtrace);
1628     _bcis = get_bcis(backtrace);
1629     _mirrors = get_mirrors(backtrace);
1630     _names = get_names(backtrace);
1631     assert(_methods->length() == _bcis->length() &&
1632            _methods->length() == _mirrors->length() &&
1633            _mirrors->length() == _names->length(),
1634            "method and source information arrays should match");
1635 
1636     // head is the preallocated backtrace
1637     _head = backtrace();
1638     _backtrace = Handle(thread, _head);
1639     _index = 0;
1640   }
1641 
1642   void expand(TRAPS) {
1643     objArrayHandle old_head(THREAD, _head);
1644     PauseNoSafepointVerifier pnsv(&_nsv);
1645 
1646     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1647     objArrayHandle new_head(THREAD, head);
1648 
1649     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1650     typeArrayHandle new_methods(THREAD, methods);
1651 
1652     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1653     typeArrayHandle new_bcis(THREAD, bcis);
1654 
1655     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1656     objArrayHandle new_mirrors(THREAD, mirrors);
1657 
1658     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
1659     typeArrayHandle new_names(THREAD, names);
1660 
1661     if (!old_head.is_null()) {
1662       old_head->obj_at_put(trace_next_offset, new_head());
1663     }
1664     new_head->obj_at_put(trace_methods_offset, new_methods());
1665     new_head->obj_at_put(trace_bcis_offset, new_bcis());
1666     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1667     new_head->obj_at_put(trace_names_offset, new_names());
1668 
1669     _head    = new_head();
1670     _methods = new_methods();
1671     _bcis = new_bcis();
1672     _mirrors = new_mirrors();
1673     _names  = new_names();
1674     _index = 0;
1675   }
1676 
1677   oop backtrace() {
1678     return _backtrace();
1679   }
1680 
1681   inline void push(Method* method, int bci, TRAPS) {
1682     // Smear the -1 bci to 0 since the array only holds unsigned
1683     // shorts.  The later line number lookup would just smear the -1
1684     // to a 0 even if it could be recorded.
1685     if (bci == SynchronizationEntryBCI) bci = 0;
1686 
1687     if (_index >= trace_chunk_size) {
1688       methodHandle mhandle(THREAD, method);
1689       expand(CHECK);
1690       method = mhandle();
1691     }
1692 
1693     _methods->short_at_put(_index, method->orig_method_idnum());
1694     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1695 
1696     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
1697     // klass owning the symbols alive so their refcounts aren't decremented.
1698     Symbol* name = method->name();
1699     _names->symbol_at_put(_index, name);
1700 
1701     // We need to save the mirrors in the backtrace to keep the class
1702     // from being unloaded while we still have this stack trace.
1703     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1704     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1705     _index++;
1706   }
1707 
1708 };
1709 
1710 struct BacktraceElement : public StackObj {
1711   int _method_id;
1712   int _bci;
1713   int _version;
1714   Symbol* _name;
1715   Handle _mirror;
1716   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
1717                    _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
1718 };
1719 
1720 class BacktraceIterator : public StackObj {
1721   int _index;
1722   objArrayHandle  _result;
1723   objArrayHandle  _mirrors;
1724   typeArrayHandle _methods;
1725   typeArrayHandle _bcis;
1726   typeArrayHandle _names;
1727 
1728   void init(objArrayHandle result, Thread* thread) {
1729     // Get method id, bci, version and mirror from chunk
1730     _result = result;
1731     if (_result.not_null()) {
1732       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1733       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1734       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1735       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
1736       _index = 0;
1737     }
1738   }
1739  public:
1740   BacktraceIterator(objArrayHandle result, Thread* thread) {
1741     init(result, thread);
1742     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1743   }
1744 
1745   BacktraceElement next(Thread* thread) {
1746     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1747                         _methods->short_at(_index),
1748                         Backtrace::version_at(_bcis->int_at(_index)),
1749                         Backtrace::bci_at(_bcis->int_at(_index)),
1750                         _names->symbol_at(_index));
1751     _index++;
1752 
1753     if (_index >= java_lang_Throwable::trace_chunk_size) {
1754       int next_offset = java_lang_Throwable::trace_next_offset;
1755       // Get next chunk
1756       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1757       init(result, thread);
1758     }
1759     return e;
1760   }
1761 
1762   bool repeat() {
1763     return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1764   }
1765 };
1766 
1767 
1768 // Print stack trace element to resource allocated buffer
1769 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1770                                           int version, int bci, Symbol* name) {
1771   ResourceMark rm;
1772 
1773   // Get strings and string lengths
1774   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1775   const char* klass_name  = holder->external_name();
1776   int buf_len = (int)strlen(klass_name);
1777 
1778   char* method_name = name->as_C_string();
1779   buf_len += (int)strlen(method_name);
1780 
1781   char* source_file_name = NULL;
1782   Symbol* source = Backtrace::get_source_file_name(holder, version);
1783   if (source != NULL) {
1784     source_file_name = source->as_C_string();
1785     buf_len += (int)strlen(source_file_name);
1786   }
1787 
1788   char *module_name = NULL, *module_version = NULL;
1789   ModuleEntry* module = holder->module();
1790   if (module->is_named()) {
1791     module_name = module->name()->as_C_string();
1792     buf_len += (int)strlen(module_name);
1793     if (module->version() != NULL) {
1794       module_version = module->version()->as_C_string();
1795       buf_len += (int)strlen(module_version);
1796     }
1797   }
1798 
1799   // Allocate temporary buffer with extra space for formatting and line number
1800   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1801 
1802   // Print stack trace line in buffer
1803   sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1804 
1805   // Print module information
1806   if (module_name != NULL) {
1807     if (module_version != NULL) {
1808       sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1809     } else {
1810       sprintf(buf + (int)strlen(buf), "%s/", module_name);
1811     }
1812   }
1813 
1814   // The method can be NULL if the requested class version is gone
1815   Method* method = holder->method_with_orig_idnum(method_id, version);
1816   if (!version_matches(method, version)) {
1817     strcat(buf, "Redefined)");
1818   } else {
1819     int line_number = Backtrace::get_line_number(method, bci);
1820     if (line_number == -2) {
1821       strcat(buf, "Native Method)");
1822     } else {
1823       if (source_file_name != NULL && (line_number != -1)) {
1824         // Sourcename and linenumber
1825         sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1826       } else if (source_file_name != NULL) {
1827         // Just sourcename
1828         sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1829       } else {
1830         // Neither sourcename nor linenumber
1831         sprintf(buf + (int)strlen(buf), "Unknown Source)");
1832       }
1833       CompiledMethod* nm = method->code();
1834       if (WizardMode && nm != NULL) {
1835         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1836       }
1837     }
1838   }
1839 
1840   st->print_cr("%s", buf);
1841 }
1842 
1843 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1844   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
1845   int method_id = method->orig_method_idnum();
1846   int version = method->constants()->version();
1847   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
1848 }
1849 
1850 /**
1851  * Print the throwable message and its stack trace plus all causes by walking the
1852  * cause chain.  The output looks the same as of Throwable.printStackTrace().
1853  */
1854 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1855   // First, print the message.
1856   print(throwable(), st);
1857   st->cr();
1858 
1859   // Now print the stack trace.
1860   Thread* THREAD = Thread::current();
1861   while (throwable.not_null()) {
1862     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1863     if (result.is_null()) {
1864       st->print_raw_cr("\t<<no stack trace available>>");
1865       return;
1866     }
1867     BacktraceIterator iter(result, THREAD);
1868 
1869     while (iter.repeat()) {
1870       BacktraceElement bte = iter.next(THREAD);
1871       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
1872     }
1873     {
1874       // Call getCause() which doesn't necessarily return the _cause field.
1875       EXCEPTION_MARK;
1876       JavaValue cause(T_OBJECT);
1877       JavaCalls::call_virtual(&cause,
1878                               throwable,
1879                               throwable->klass(),
1880                               vmSymbols::getCause_name(),
1881                               vmSymbols::void_throwable_signature(),
1882                               THREAD);
1883       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1884       if (HAS_PENDING_EXCEPTION) {
1885         CLEAR_PENDING_EXCEPTION;
1886         throwable = Handle();
1887       } else {
1888         throwable = Handle(THREAD, (oop) cause.get_jobject());
1889         if (throwable.not_null()) {
1890           st->print("Caused by: ");
1891           print(throwable(), st);
1892           st->cr();
1893         }
1894       }
1895     }
1896   }
1897 }
1898 
1899 /**
1900  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1901  */
1902 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1903   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1904   JavaValue result(T_VOID);
1905   JavaCalls::call_virtual(&result,
1906                           throwable,
1907                           SystemDictionary::Throwable_klass(),
1908                           vmSymbols::printStackTrace_name(),
1909                           vmSymbols::void_method_signature(),
1910                           THREAD);
1911 }
1912 
1913 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1914   if (!StackTraceInThrowable) return;
1915   ResourceMark rm(THREAD);
1916 
1917   // Start out by clearing the backtrace for this object, in case the VM
1918   // runs out of memory while allocating the stack trace
1919   set_backtrace(throwable(), NULL);
1920   // Clear lazily constructed Java level stacktrace if refilling occurs
1921   // This is unnecessary in 1.7+ but harmless
1922   clear_stacktrace(throwable());
1923 
1924   int max_depth = MaxJavaStackTraceDepth;
1925   JavaThread* thread = (JavaThread*)THREAD;
1926 
1927   BacktraceBuilder bt(CHECK);
1928 
1929   // If there is no Java frame just return the method that was being called
1930   // with bci 0
1931   if (!thread->has_last_Java_frame()) {
1932     if (max_depth >= 1 && method() != NULL) {
1933       bt.push(method(), 0, CHECK);
1934       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1935       set_depth(throwable(), 1);
1936       set_backtrace(throwable(), bt.backtrace());
1937     }
1938     return;
1939   }
1940 
1941   // Instead of using vframe directly, this version of fill_in_stack_trace
1942   // basically handles everything by hand. This significantly improved the
1943   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1944   // See bug 6333838 for  more details.
1945   // The "ASSERT" here is to verify this method generates the exactly same stack
1946   // trace as utilizing vframe.
1947 #ifdef ASSERT
1948   vframeStream st(thread);
1949   methodHandle st_method(THREAD, st.method());
1950 #endif
1951   int total_count = 0;
1952   RegisterMap map(thread, false);
1953   int decode_offset = 0;
1954   CompiledMethod* nm = NULL;
1955   bool skip_fillInStackTrace_check = false;
1956   bool skip_throwableInit_check = false;
1957   bool skip_hidden = !ShowHiddenFrames;
1958 
1959   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1960     Method* method = NULL;
1961     int bci = 0;
1962 
1963     // Compiled java method case.
1964     if (decode_offset != 0) {
1965       DebugInfoReadStream stream(nm, decode_offset);
1966       decode_offset = stream.read_int();
1967       method = (Method*)nm->metadata_at(stream.read_int());
1968       bci = stream.read_bci();
1969     } else {
1970       if (fr.is_first_frame()) break;
1971       address pc = fr.pc();
1972       if (fr.is_interpreted_frame()) {
1973         address bcp = fr.interpreter_frame_bcp();
1974         method = fr.interpreter_frame_method();
1975         bci =  method->bci_from(bcp);
1976         fr = fr.sender(&map);
1977       } else {
1978         CodeBlob* cb = fr.cb();
1979         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1980         // but non nmethod
1981         fr = fr.sender(&map);
1982         if (cb == NULL || !cb->is_compiled()) {
1983           continue;
1984         }
1985         nm = cb->as_compiled_method();
1986         if (nm->method()->is_native()) {
1987           method = nm->method();
1988           bci = 0;
1989         } else {
1990           PcDesc* pd = nm->pc_desc_at(pc);
1991           decode_offset = pd->scope_decode_offset();
1992           // if decode_offset is not equal to 0, it will execute the
1993           // "compiled java method case" at the beginning of the loop.
1994           continue;
1995         }
1996       }
1997     }
1998 #ifdef ASSERT
1999     assert(st_method() == method && st.bci() == bci,
2000            "Wrong stack trace");
2001     st.next();
2002     // vframeStream::method isn't GC-safe so store off a copy
2003     // of the Method* in case we GC.
2004     if (!st.at_end()) {
2005       st_method = st.method();
2006     }
2007 #endif
2008 
2009     // the format of the stacktrace will be:
2010     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2011     // - 0 or more <init> methods for the exception class (skipped)
2012     // - rest of the stack
2013 
2014     if (!skip_fillInStackTrace_check) {
2015       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2016           throwable->is_a(method->method_holder())) {
2017         continue;
2018       }
2019       else {
2020         skip_fillInStackTrace_check = true; // gone past them all
2021       }
2022     }
2023     if (!skip_throwableInit_check) {
2024       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2025 
2026       // skip <init> methods of the exception class and superclasses
2027       // This is simlar to classic VM.
2028       if (method->name() == vmSymbols::object_initializer_name() &&
2029           throwable->is_a(method->method_holder())) {
2030         continue;
2031       } else {
2032         // there are none or we've seen them all - either way stop checking
2033         skip_throwableInit_check = true;
2034       }
2035     }
2036     if (method->is_hidden()) {
2037       if (skip_hidden)  continue;
2038     }
2039     bt.push(method, bci, CHECK);
2040     total_count++;
2041   }
2042 
2043   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2044 
2045   // Put completed stack trace into throwable object
2046   set_backtrace(throwable(), bt.backtrace());
2047   set_depth(throwable(), total_count);
2048 }
2049 
2050 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2051   // No-op if stack trace is disabled
2052   if (!StackTraceInThrowable) {
2053     return;
2054   }
2055 
2056   // Disable stack traces for some preallocated out of memory errors
2057   if (!Universe::should_fill_in_stack_trace(throwable)) {
2058     return;
2059   }
2060 
2061   PRESERVE_EXCEPTION_MARK;
2062 
2063   JavaThread* thread = JavaThread::active();
2064   fill_in_stack_trace(throwable, method, thread);
2065   // ignore exceptions thrown during stack trace filling
2066   CLEAR_PENDING_EXCEPTION;
2067 }
2068 
2069 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2070   // Allocate stack trace - backtrace is created but not filled in
2071 
2072   // No-op if stack trace is disabled
2073   if (!StackTraceInThrowable) return;
2074   BacktraceBuilder bt(CHECK);   // creates a backtrace
2075   set_backtrace(throwable(), bt.backtrace());
2076 }
2077 
2078 
2079 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2080   // Fill in stack trace into preallocated backtrace (no GC)
2081 
2082   // No-op if stack trace is disabled
2083   if (!StackTraceInThrowable) return;
2084 
2085   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2086 
2087   JavaThread* THREAD = JavaThread::current();
2088 
2089   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2090   assert(backtrace.not_null(), "backtrace should have been preallocated");
2091 
2092   ResourceMark rm(THREAD);
2093   vframeStream st(THREAD);
2094 
2095   BacktraceBuilder bt(THREAD, backtrace);
2096 
2097   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2098   // methods as preallocated errors aren't created by "java" code.
2099 
2100   // fill in as much stack trace as possible
2101   int chunk_count = 0;
2102   for (;!st.at_end(); st.next()) {
2103     bt.push(st.method(), st.bci(), CHECK);
2104     chunk_count++;
2105 
2106     // Bail-out for deep stacks
2107     if (chunk_count >= trace_chunk_size) break;
2108   }
2109   set_depth(throwable(), chunk_count);
2110   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2111 
2112   // We support the Throwable immutability protocol defined for Java 7.
2113   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2114   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2115 }
2116 
2117 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2118                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2119 
2120   if (throwable.is_null() || stack_trace_array_h.is_null()) {
2121     THROW(vmSymbols::java_lang_NullPointerException());
2122   }
2123 
2124   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2125 
2126   if (stack_trace_array_h->length() != depth(throwable())) {
2127     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2128   }
2129 
2130   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2131   BacktraceIterator iter(result, THREAD);
2132 
2133   int index = 0;
2134   while (iter.repeat()) {
2135     BacktraceElement bte = iter.next(THREAD);
2136 
2137     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2138 
2139     if (stack_trace_element.is_null()) {
2140       THROW(vmSymbols::java_lang_NullPointerException());
2141     }
2142 
2143     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2144     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2145 
2146     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2147                                          method,
2148                                          bte._version,
2149                                          bte._bci,
2150                                          bte._name, CHECK);
2151   }
2152 }
2153 
2154 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2155   // Allocate java.lang.StackTraceElement instance
2156   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2157   assert(k != NULL, "must be loaded in 1.4+");
2158   if (k->should_be_initialized()) {
2159     k->initialize(CHECK_0);
2160   }
2161 
2162   Handle element = k->allocate_instance_handle(CHECK_0);
2163 
2164   int version = method->constants()->version();
2165   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2166   return element();
2167 }
2168 
2169 void java_lang_StackTraceElement::fill_in(Handle element,
2170                                           InstanceKlass* holder, const methodHandle& method,
2171                                           int version, int bci, Symbol* name, TRAPS) {
2172   assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2173 
2174   // Fill in class name
2175   ResourceMark rm(THREAD);
2176   const char* str = holder->external_name();
2177   oop classname = StringTable::intern((char*) str, CHECK);
2178   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2179   java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2180 
2181   oop loader = holder->class_loader();
2182   if (loader != NULL) {
2183     oop loader_name = java_lang_ClassLoader::name(loader);
2184     if (loader_name != NULL)
2185       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2186   }
2187 
2188   // Fill in method name
2189   oop methodname = StringTable::intern(name, CHECK);
2190   java_lang_StackTraceElement::set_methodName(element(), methodname);
2191 
2192   // Fill in module name and version
2193   ModuleEntry* module = holder->module();
2194   if (module->is_named()) {
2195     oop module_name = StringTable::intern(module->name(), CHECK);
2196     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2197     oop module_version;
2198     if (module->version() != NULL) {
2199       module_version = StringTable::intern(module->version(), CHECK);
2200     } else {
2201       module_version = NULL;
2202     }
2203     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2204   }
2205 
2206   if (method() == NULL || !version_matches(method(), version)) {
2207     // The method was redefined, accurate line number information isn't available
2208     java_lang_StackTraceElement::set_fileName(element(), NULL);
2209     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2210   } else {
2211     // Fill in source file name and line number.
2212     Symbol* source = Backtrace::get_source_file_name(holder, version);
2213     if (ShowHiddenFrames && source == NULL)
2214       source = vmSymbols::unknown_class_name();
2215     oop filename = StringTable::intern(source, CHECK);
2216     java_lang_StackTraceElement::set_fileName(element(), filename);
2217 
2218     int line_number = Backtrace::get_line_number(method, bci);
2219     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2220   }
2221 }
2222 
2223 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2224   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2225   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2226   // we should expand MemberName::name when Throwable uses StackTrace
2227   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2228   return method;
2229 }
2230 
2231 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) {
2232   // set Method* or mid/cpref
2233   Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2234   InstanceKlass* ik = method->method_holder();
2235   CallInfo info(method(), ik);
2236   MethodHandles::init_method_MemberName(mname, info);
2237   // set bci
2238   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2239   // method may be redefined; store the version
2240   int version = method->constants()->version();
2241   assert((jushort)version == version, "version should be short");
2242   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2243 }
2244 
2245 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2246   ResourceMark rm(THREAD);
2247   Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset));
2248   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k()));
2249   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2250 
2251   short version = stackFrame->short_field(_version_offset);
2252   short bci = stackFrame->short_field(_bci_offset);
2253   Symbol* name = method->name();
2254   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2255 }
2256 
2257 void java_lang_StackFrameInfo::compute_offsets() {
2258   Klass* k = SystemDictionary::StackFrameInfo_klass();
2259   compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(),  vmSymbols::class_signature());
2260   compute_offset(_memberName_offset,     k, vmSymbols::memberName_name(),  vmSymbols::object_signature());
2261   compute_offset(_bci_offset,            k, vmSymbols::bci_name(),         vmSymbols::short_signature());
2262   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2263 }
2264 
2265 void java_lang_LiveStackFrameInfo::compute_offsets() {
2266   Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
2267   compute_offset(_monitors_offset,   k, vmSymbols::monitors_name(),    vmSymbols::object_array_signature());
2268   compute_offset(_locals_offset,     k, vmSymbols::locals_name(),      vmSymbols::object_array_signature());
2269   compute_offset(_operands_offset,   k, vmSymbols::operands_name(),    vmSymbols::object_array_signature());
2270   compute_offset(_mode_offset,       k, vmSymbols::mode_name(),        vmSymbols::int_signature());
2271 }
2272 
2273 void java_lang_reflect_AccessibleObject::compute_offsets() {
2274   Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
2275   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
2276 }
2277 
2278 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2279   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280   return (jboolean) reflect->bool_field(override_offset);
2281 }
2282 
2283 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2284   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2285   reflect->bool_field_put(override_offset, (int) value);
2286 }
2287 
2288 void java_lang_reflect_Method::compute_offsets() {
2289   Klass* k = SystemDictionary::reflect_Method_klass();
2290   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2291   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
2292   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
2293   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2294   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2295   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2296   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2297   // The generic signature and annotations fields are only present in 1.5
2298   signature_offset = -1;
2299   annotations_offset = -1;
2300   parameter_annotations_offset = -1;
2301   annotation_default_offset = -1;
2302   type_annotations_offset = -1;
2303   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2304   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2305   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2306   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
2307   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2308 }
2309 
2310 Handle java_lang_reflect_Method::create(TRAPS) {
2311   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2312   Klass* klass = SystemDictionary::reflect_Method_klass();
2313   // This class is eagerly initialized during VM initialization, since we keep a refence
2314   // to one of the methods
2315   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2316   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2317 }
2318 
2319 oop java_lang_reflect_Method::clazz(oop reflect) {
2320   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2321   return reflect->obj_field(clazz_offset);
2322 }
2323 
2324 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2325   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2326    reflect->obj_field_put(clazz_offset, value);
2327 }
2328 
2329 int java_lang_reflect_Method::slot(oop reflect) {
2330   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2331   return reflect->int_field(slot_offset);
2332 }
2333 
2334 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2335   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2336   reflect->int_field_put(slot_offset, value);
2337 }
2338 
2339 oop java_lang_reflect_Method::name(oop method) {
2340   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2341   return method->obj_field(name_offset);
2342 }
2343 
2344 void java_lang_reflect_Method::set_name(oop method, oop value) {
2345   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346   method->obj_field_put(name_offset, value);
2347 }
2348 
2349 oop java_lang_reflect_Method::return_type(oop method) {
2350   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2351   return method->obj_field(returnType_offset);
2352 }
2353 
2354 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2355   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356   method->obj_field_put(returnType_offset, value);
2357 }
2358 
2359 oop java_lang_reflect_Method::parameter_types(oop method) {
2360   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361   return method->obj_field(parameterTypes_offset);
2362 }
2363 
2364 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2365   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366   method->obj_field_put(parameterTypes_offset, value);
2367 }
2368 
2369 oop java_lang_reflect_Method::exception_types(oop method) {
2370   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2371   return method->obj_field(exceptionTypes_offset);
2372 }
2373 
2374 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2375   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2376   method->obj_field_put(exceptionTypes_offset, value);
2377 }
2378 
2379 int java_lang_reflect_Method::modifiers(oop method) {
2380   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2381   return method->int_field(modifiers_offset);
2382 }
2383 
2384 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2385   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2386   method->int_field_put(modifiers_offset, value);
2387 }
2388 
2389 bool java_lang_reflect_Method::has_signature_field() {
2390   return (signature_offset >= 0);
2391 }
2392 
2393 oop java_lang_reflect_Method::signature(oop method) {
2394   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395   assert(has_signature_field(), "signature field must be present");
2396   return method->obj_field(signature_offset);
2397 }
2398 
2399 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2400   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2401   assert(has_signature_field(), "signature field must be present");
2402   method->obj_field_put(signature_offset, value);
2403 }
2404 
2405 bool java_lang_reflect_Method::has_annotations_field() {
2406   return (annotations_offset >= 0);
2407 }
2408 
2409 oop java_lang_reflect_Method::annotations(oop method) {
2410   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2411   assert(has_annotations_field(), "annotations field must be present");
2412   return method->obj_field(annotations_offset);
2413 }
2414 
2415 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2416   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2417   assert(has_annotations_field(), "annotations field must be present");
2418   method->obj_field_put(annotations_offset, value);
2419 }
2420 
2421 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2422   return (parameter_annotations_offset >= 0);
2423 }
2424 
2425 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2426   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2427   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2428   return method->obj_field(parameter_annotations_offset);
2429 }
2430 
2431 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2432   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2433   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2434   method->obj_field_put(parameter_annotations_offset, value);
2435 }
2436 
2437 bool java_lang_reflect_Method::has_annotation_default_field() {
2438   return (annotation_default_offset >= 0);
2439 }
2440 
2441 oop java_lang_reflect_Method::annotation_default(oop method) {
2442   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2443   assert(has_annotation_default_field(), "annotation default field must be present");
2444   return method->obj_field(annotation_default_offset);
2445 }
2446 
2447 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2448   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2449   assert(has_annotation_default_field(), "annotation default field must be present");
2450   method->obj_field_put(annotation_default_offset, value);
2451 }
2452 
2453 bool java_lang_reflect_Method::has_type_annotations_field() {
2454   return (type_annotations_offset >= 0);
2455 }
2456 
2457 oop java_lang_reflect_Method::type_annotations(oop method) {
2458   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2459   assert(has_type_annotations_field(), "type_annotations field must be present");
2460   return method->obj_field(type_annotations_offset);
2461 }
2462 
2463 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2464   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2465   assert(has_type_annotations_field(), "type_annotations field must be present");
2466   method->obj_field_put(type_annotations_offset, value);
2467 }
2468 
2469 void java_lang_reflect_Constructor::compute_offsets() {
2470   Klass* k = SystemDictionary::reflect_Constructor_klass();
2471   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2472   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2473   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2474   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2475   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2476   // The generic signature and annotations fields are only present in 1.5
2477   signature_offset = -1;
2478   annotations_offset = -1;
2479   parameter_annotations_offset = -1;
2480   type_annotations_offset = -1;
2481   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2482   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2483   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2484   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2485 }
2486 
2487 Handle java_lang_reflect_Constructor::create(TRAPS) {
2488   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2489   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2490   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2491   InstanceKlass* ik = InstanceKlass::cast(k);
2492   // Ensure it is initialized
2493   ik->initialize(CHECK_NH);
2494   return ik->allocate_instance_handle(THREAD);
2495 }
2496 
2497 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2498   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2499   return reflect->obj_field(clazz_offset);
2500 }
2501 
2502 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2503   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2504    reflect->obj_field_put(clazz_offset, value);
2505 }
2506 
2507 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2508   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2509   return constructor->obj_field(parameterTypes_offset);
2510 }
2511 
2512 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2513   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2514   constructor->obj_field_put(parameterTypes_offset, value);
2515 }
2516 
2517 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2518   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2519   return constructor->obj_field(exceptionTypes_offset);
2520 }
2521 
2522 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2523   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2524   constructor->obj_field_put(exceptionTypes_offset, value);
2525 }
2526 
2527 int java_lang_reflect_Constructor::slot(oop reflect) {
2528   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2529   return reflect->int_field(slot_offset);
2530 }
2531 
2532 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2533   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2534   reflect->int_field_put(slot_offset, value);
2535 }
2536 
2537 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2538   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2539   return constructor->int_field(modifiers_offset);
2540 }
2541 
2542 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2543   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2544   constructor->int_field_put(modifiers_offset, value);
2545 }
2546 
2547 bool java_lang_reflect_Constructor::has_signature_field() {
2548   return (signature_offset >= 0);
2549 }
2550 
2551 oop java_lang_reflect_Constructor::signature(oop constructor) {
2552   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2553   assert(has_signature_field(), "signature field must be present");
2554   return constructor->obj_field(signature_offset);
2555 }
2556 
2557 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2558   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2559   assert(has_signature_field(), "signature field must be present");
2560   constructor->obj_field_put(signature_offset, value);
2561 }
2562 
2563 bool java_lang_reflect_Constructor::has_annotations_field() {
2564   return (annotations_offset >= 0);
2565 }
2566 
2567 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2568   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2569   assert(has_annotations_field(), "annotations field must be present");
2570   return constructor->obj_field(annotations_offset);
2571 }
2572 
2573 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2574   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2575   assert(has_annotations_field(), "annotations field must be present");
2576   constructor->obj_field_put(annotations_offset, value);
2577 }
2578 
2579 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2580   return (parameter_annotations_offset >= 0);
2581 }
2582 
2583 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2584   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2585   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2586   return method->obj_field(parameter_annotations_offset);
2587 }
2588 
2589 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2590   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2591   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2592   method->obj_field_put(parameter_annotations_offset, value);
2593 }
2594 
2595 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2596   return (type_annotations_offset >= 0);
2597 }
2598 
2599 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2600   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2601   assert(has_type_annotations_field(), "type_annotations field must be present");
2602   return constructor->obj_field(type_annotations_offset);
2603 }
2604 
2605 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2606   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2607   assert(has_type_annotations_field(), "type_annotations field must be present");
2608   constructor->obj_field_put(type_annotations_offset, value);
2609 }
2610 
2611 void java_lang_reflect_Field::compute_offsets() {
2612   Klass* k = SystemDictionary::reflect_Field_klass();
2613   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2614   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
2615   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
2616   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
2617   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2618   // The generic signature and annotations fields are only present in 1.5
2619   signature_offset = -1;
2620   annotations_offset = -1;
2621   type_annotations_offset = -1;
2622   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2623   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
2624   compute_optional_offset(type_annotations_offset,  k, vmSymbols::type_annotations_name(),  vmSymbols::byte_array_signature());
2625 }
2626 
2627 Handle java_lang_reflect_Field::create(TRAPS) {
2628   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2629   Symbol* name = vmSymbols::java_lang_reflect_Field();
2630   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2631   InstanceKlass* ik = InstanceKlass::cast(k);
2632   // Ensure it is initialized
2633   ik->initialize(CHECK_NH);
2634   return ik->allocate_instance_handle(THREAD);
2635 }
2636 
2637 oop java_lang_reflect_Field::clazz(oop reflect) {
2638   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2639   return reflect->obj_field(clazz_offset);
2640 }
2641 
2642 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2643   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2644    reflect->obj_field_put(clazz_offset, value);
2645 }
2646 
2647 oop java_lang_reflect_Field::name(oop field) {
2648   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2649   return field->obj_field(name_offset);
2650 }
2651 
2652 void java_lang_reflect_Field::set_name(oop field, oop value) {
2653   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2654   field->obj_field_put(name_offset, value);
2655 }
2656 
2657 oop java_lang_reflect_Field::type(oop field) {
2658   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2659   return field->obj_field(type_offset);
2660 }
2661 
2662 void java_lang_reflect_Field::set_type(oop field, oop value) {
2663   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2664   field->obj_field_put(type_offset, value);
2665 }
2666 
2667 int java_lang_reflect_Field::slot(oop reflect) {
2668   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2669   return reflect->int_field(slot_offset);
2670 }
2671 
2672 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2673   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2674   reflect->int_field_put(slot_offset, value);
2675 }
2676 
2677 int java_lang_reflect_Field::modifiers(oop field) {
2678   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2679   return field->int_field(modifiers_offset);
2680 }
2681 
2682 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2683   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2684   field->int_field_put(modifiers_offset, value);
2685 }
2686 
2687 bool java_lang_reflect_Field::has_signature_field() {
2688   return (signature_offset >= 0);
2689 }
2690 
2691 oop java_lang_reflect_Field::signature(oop field) {
2692   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2693   assert(has_signature_field(), "signature field must be present");
2694   return field->obj_field(signature_offset);
2695 }
2696 
2697 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2698   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2699   assert(has_signature_field(), "signature field must be present");
2700   field->obj_field_put(signature_offset, value);
2701 }
2702 
2703 bool java_lang_reflect_Field::has_annotations_field() {
2704   return (annotations_offset >= 0);
2705 }
2706 
2707 oop java_lang_reflect_Field::annotations(oop field) {
2708   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2709   assert(has_annotations_field(), "annotations field must be present");
2710   return field->obj_field(annotations_offset);
2711 }
2712 
2713 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2714   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2715   assert(has_annotations_field(), "annotations field must be present");
2716   field->obj_field_put(annotations_offset, value);
2717 }
2718 
2719 bool java_lang_reflect_Field::has_type_annotations_field() {
2720   return (type_annotations_offset >= 0);
2721 }
2722 
2723 oop java_lang_reflect_Field::type_annotations(oop field) {
2724   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2725   assert(has_type_annotations_field(), "type_annotations field must be present");
2726   return field->obj_field(type_annotations_offset);
2727 }
2728 
2729 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2730   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2731   assert(has_type_annotations_field(), "type_annotations field must be present");
2732   field->obj_field_put(type_annotations_offset, value);
2733 }
2734 
2735 void reflect_ConstantPool::compute_offsets() {
2736   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2737   // This null test can be removed post beta
2738   if (k != NULL) {
2739     // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2740     compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2741   }
2742 }
2743 
2744 void java_lang_reflect_Parameter::compute_offsets() {
2745   Klass* k = SystemDictionary::reflect_Parameter_klass();
2746   if(NULL != k) {
2747     compute_offset(name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
2748     compute_offset(modifiers_offset,   k, vmSymbols::modifiers_name(),   vmSymbols::int_signature());
2749     compute_offset(index_offset,       k, vmSymbols::index_name(),       vmSymbols::int_signature());
2750     compute_offset(executable_offset,  k, vmSymbols::executable_name(),  vmSymbols::executable_signature());
2751   }
2752 }
2753 
2754 Handle java_lang_reflect_Parameter::create(TRAPS) {
2755   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2756   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2757   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2758   InstanceKlass* ik = InstanceKlass::cast(k);
2759   // Ensure it is initialized
2760   ik->initialize(CHECK_NH);
2761   return ik->allocate_instance_handle(THREAD);
2762 }
2763 
2764 oop java_lang_reflect_Parameter::name(oop param) {
2765   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2766   return param->obj_field(name_offset);
2767 }
2768 
2769 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2770   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2771   param->obj_field_put(name_offset, value);
2772 }
2773 
2774 int java_lang_reflect_Parameter::modifiers(oop param) {
2775   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2776   return param->int_field(modifiers_offset);
2777 }
2778 
2779 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2780   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2781   param->int_field_put(modifiers_offset, value);
2782 }
2783 
2784 int java_lang_reflect_Parameter::index(oop param) {
2785   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2786   return param->int_field(index_offset);
2787 }
2788 
2789 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2790   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2791   param->int_field_put(index_offset, value);
2792 }
2793 
2794 oop java_lang_reflect_Parameter::executable(oop param) {
2795   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2796   return param->obj_field(executable_offset);
2797 }
2798 
2799 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2800   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2801   param->obj_field_put(executable_offset, value);
2802 }
2803 
2804 
2805 int java_lang_reflect_Module::loader_offset;
2806 int java_lang_reflect_Module::name_offset;
2807 int java_lang_reflect_Module::_module_entry_offset = -1;
2808 
2809 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) {
2810   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2811 
2812   Symbol* name = vmSymbols::java_lang_reflect_Module();
2813   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2814   InstanceKlass* ik = InstanceKlass::cast(k);
2815   Handle jlrmh = ik->allocate_instance_handle(CHECK_NH);
2816   JavaValue result(T_VOID);
2817   JavaCalls::call_special(&result, jlrmh, ik,
2818                           vmSymbols::object_initializer_name(),
2819                           vmSymbols::java_lang_reflect_module_init_signature(),
2820                           loader, module_name, CHECK_NH);
2821   return jlrmh;
2822 }
2823 
2824 void java_lang_reflect_Module::compute_offsets() {
2825   Klass* k = SystemDictionary::reflect_Module_klass();
2826   if(NULL != k) {
2827     compute_offset(loader_offset,  k, vmSymbols::loader_name(),  vmSymbols::classloader_signature());
2828     compute_offset(name_offset,    k, vmSymbols::name_name(),    vmSymbols::string_signature());
2829     MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2830   }
2831 }
2832 
2833 
2834 oop java_lang_reflect_Module::loader(oop module) {
2835   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2836   return module->obj_field(loader_offset);
2837 }
2838 
2839 void java_lang_reflect_Module::set_loader(oop module, oop value) {
2840   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2841   module->obj_field_put(loader_offset, value);
2842 }
2843 
2844 oop java_lang_reflect_Module::name(oop module) {
2845   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2846   return module->obj_field(name_offset);
2847 }
2848 
2849 void java_lang_reflect_Module::set_name(oop module, oop value) {
2850   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2851   module->obj_field_put(name_offset, value);
2852 }
2853 
2854 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) {
2855   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2856   assert(module != NULL, "module can't be null");
2857   assert(module->is_oop(), "module must be oop");
2858 
2859   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2860   if (module_entry == NULL) {
2861     // If the inject field containing the ModuleEntry* is null then return the
2862     // class loader's unnamed module.
2863     oop loader = java_lang_reflect_Module::loader(module);
2864     Handle h_loader = Handle(THREAD, loader);
2865     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2866     return loader_cld->modules()->unnamed_module();
2867   }
2868   return module_entry;
2869 }
2870 
2871 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2872   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2873   assert(module != NULL, "module can't be null");
2874   assert(module->is_oop(), "module must be oop");
2875   module->address_field_put(_module_entry_offset, (address)module_entry);
2876 }
2877 
2878 Handle reflect_ConstantPool::create(TRAPS) {
2879   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2880   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
2881   // Ensure it is initialized
2882   k->initialize(CHECK_NH);
2883   return k->allocate_instance_handle(THREAD);
2884 }
2885 
2886 
2887 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2888   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2889   oop mirror = value->pool_holder()->java_mirror();
2890   // Save the mirror to get back the constant pool.
2891   reflect->obj_field_put(_oop_offset, mirror);
2892 }
2893 
2894 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2895   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2896 
2897   oop mirror = reflect->obj_field(_oop_offset);
2898   Klass* k = java_lang_Class::as_Klass(mirror);
2899   assert(k->is_instance_klass(), "Must be");
2900 
2901   // Get the constant pool back from the klass.  Since class redefinition
2902   // merges the new constant pool into the old, this is essentially the
2903   // same constant pool as the original.  If constant pool merging is
2904   // no longer done in the future, this will have to change to save
2905   // the original.
2906   return InstanceKlass::cast(k)->constants();
2907 }
2908 
2909 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2910   Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2911   // This null test can be removed post beta
2912   if (k != NULL) {
2913     compute_offset(_base_offset, k,
2914                    vmSymbols::base_name(), vmSymbols::object_signature());
2915   }
2916 }
2917 
2918 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2919   Klass* k = SystemDictionary::box_klass(type);
2920   if (k == NULL)  return NULL;
2921   InstanceKlass* ik = InstanceKlass::cast(k);
2922   if (!ik->is_initialized())  ik->initialize(CHECK_0);
2923   return ik->allocate_instance(THREAD);
2924 }
2925 
2926 
2927 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2928   oop box = initialize_and_allocate(type, CHECK_0);
2929   if (box == NULL)  return NULL;
2930   switch (type) {
2931     case T_BOOLEAN:
2932       box->bool_field_put(value_offset, value->z);
2933       break;
2934     case T_CHAR:
2935       box->char_field_put(value_offset, value->c);
2936       break;
2937     case T_FLOAT:
2938       box->float_field_put(value_offset, value->f);
2939       break;
2940     case T_DOUBLE:
2941       box->double_field_put(long_value_offset, value->d);
2942       break;
2943     case T_BYTE:
2944       box->byte_field_put(value_offset, value->b);
2945       break;
2946     case T_SHORT:
2947       box->short_field_put(value_offset, value->s);
2948       break;
2949     case T_INT:
2950       box->int_field_put(value_offset, value->i);
2951       break;
2952     case T_LONG:
2953       box->long_field_put(long_value_offset, value->j);
2954       break;
2955     default:
2956       return NULL;
2957   }
2958   return box;
2959 }
2960 
2961 
2962 BasicType java_lang_boxing_object::basic_type(oop box) {
2963   if (box == NULL)  return T_ILLEGAL;
2964   BasicType type = SystemDictionary::box_klass_type(box->klass());
2965   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
2966     return T_ILLEGAL;
2967   return type;
2968 }
2969 
2970 
2971 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2972   BasicType type = SystemDictionary::box_klass_type(box->klass());
2973   switch (type) {
2974   case T_BOOLEAN:
2975     value->z = box->bool_field(value_offset);
2976     break;
2977   case T_CHAR:
2978     value->c = box->char_field(value_offset);
2979     break;
2980   case T_FLOAT:
2981     value->f = box->float_field(value_offset);
2982     break;
2983   case T_DOUBLE:
2984     value->d = box->double_field(long_value_offset);
2985     break;
2986   case T_BYTE:
2987     value->b = box->byte_field(value_offset);
2988     break;
2989   case T_SHORT:
2990     value->s = box->short_field(value_offset);
2991     break;
2992   case T_INT:
2993     value->i = box->int_field(value_offset);
2994     break;
2995   case T_LONG:
2996     value->j = box->long_field(long_value_offset);
2997     break;
2998   default:
2999     return T_ILLEGAL;
3000   } // end switch
3001   return type;
3002 }
3003 
3004 
3005 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3006   BasicType type = SystemDictionary::box_klass_type(box->klass());
3007   switch (type) {
3008   case T_BOOLEAN:
3009     box->bool_field_put(value_offset, value->z);
3010     break;
3011   case T_CHAR:
3012     box->char_field_put(value_offset, value->c);
3013     break;
3014   case T_FLOAT:
3015     box->float_field_put(value_offset, value->f);
3016     break;
3017   case T_DOUBLE:
3018     box->double_field_put(long_value_offset, value->d);
3019     break;
3020   case T_BYTE:
3021     box->byte_field_put(value_offset, value->b);
3022     break;
3023   case T_SHORT:
3024     box->short_field_put(value_offset, value->s);
3025     break;
3026   case T_INT:
3027     box->int_field_put(value_offset, value->i);
3028     break;
3029   case T_LONG:
3030     box->long_field_put(long_value_offset, value->j);
3031     break;
3032   default:
3033     return T_ILLEGAL;
3034   } // end switch
3035   return type;
3036 }
3037 
3038 
3039 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3040   switch (type) {
3041   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3042   case T_CHAR:      st->print("%d", value->c);                      break;
3043   case T_BYTE:      st->print("%d", value->b);                      break;
3044   case T_SHORT:     st->print("%d", value->s);                      break;
3045   case T_INT:       st->print("%d", value->i);                      break;
3046   case T_LONG:      st->print(INT64_FORMAT, value->j);              break;
3047   case T_FLOAT:     st->print("%f", value->f);                      break;
3048   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3049   default:          st->print("type %d?", type);                    break;
3050   }
3051 }
3052 
3053 // Support for java_lang_ref_SoftReference
3054 
3055 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3056   return ref->long_field(timestamp_offset);
3057 }
3058 
3059 jlong java_lang_ref_SoftReference::clock() {
3060   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3061   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3062   return *offset;
3063 }
3064 
3065 void java_lang_ref_SoftReference::set_clock(jlong value) {
3066   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3067   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3068   *offset = value;
3069 }
3070 
3071 // Support for java_lang_invoke_DirectMethodHandle
3072 
3073 int java_lang_invoke_DirectMethodHandle::_member_offset;
3074 
3075 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3076   oop member_name = NULL;
3077   bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
3078   assert(is_dmh, "a DirectMethodHandle oop is expected");
3079   if (is_dmh) {
3080     member_name = dmh->obj_field(member_offset_in_bytes());
3081   }
3082   return member_name;
3083 }
3084 
3085 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3086   Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
3087   if (klass_oop != NULL) {
3088     compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3089   }
3090 }
3091 
3092 // Support for java_lang_invoke_MethodHandle
3093 
3094 int java_lang_invoke_MethodHandle::_type_offset;
3095 int java_lang_invoke_MethodHandle::_form_offset;
3096 
3097 int java_lang_invoke_MemberName::_clazz_offset;
3098 int java_lang_invoke_MemberName::_name_offset;
3099 int java_lang_invoke_MemberName::_type_offset;
3100 int java_lang_invoke_MemberName::_flags_offset;
3101 int java_lang_invoke_MemberName::_vmtarget_offset;
3102 int java_lang_invoke_MemberName::_vmloader_offset;
3103 int java_lang_invoke_MemberName::_vmindex_offset;
3104 
3105 int java_lang_invoke_LambdaForm::_vmentry_offset;
3106 
3107 void java_lang_invoke_MethodHandle::compute_offsets() {
3108   Klass* klass_oop = SystemDictionary::MethodHandle_klass();
3109   if (klass_oop != NULL) {
3110     compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3111     compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
3112   }
3113 }
3114 
3115 void java_lang_invoke_MemberName::compute_offsets() {
3116   Klass* klass_oop = SystemDictionary::MemberName_klass();
3117   if (klass_oop != NULL) {
3118     compute_offset(_clazz_offset,     klass_oop, vmSymbols::clazz_name(),     vmSymbols::class_signature());
3119     compute_offset(_name_offset,      klass_oop, vmSymbols::name_name(),      vmSymbols::string_signature());
3120     compute_offset(_type_offset,      klass_oop, vmSymbols::type_name(),      vmSymbols::object_signature());
3121     compute_offset(_flags_offset,     klass_oop, vmSymbols::flags_name(),     vmSymbols::int_signature());
3122     MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3123   }
3124 }
3125 
3126 void java_lang_invoke_LambdaForm::compute_offsets() {
3127   Klass* klass_oop = SystemDictionary::LambdaForm_klass();
3128   if (klass_oop != NULL) {
3129     compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
3130   }
3131 }
3132 
3133 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3134   return obj != NULL && is_subclass(obj->klass());
3135 }
3136 
3137 
3138 oop java_lang_invoke_MethodHandle::type(oop mh) {
3139   return mh->obj_field(_type_offset);
3140 }
3141 
3142 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3143   mh->obj_field_put(_type_offset, mtype);
3144 }
3145 
3146 oop java_lang_invoke_MethodHandle::form(oop mh) {
3147   assert(_form_offset != 0, "");
3148   return mh->obj_field(_form_offset);
3149 }
3150 
3151 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3152   assert(_form_offset != 0, "");
3153   mh->obj_field_put(_form_offset, lform);
3154 }
3155 
3156 /// MemberName accessors
3157 
3158 oop java_lang_invoke_MemberName::clazz(oop mname) {
3159   assert(is_instance(mname), "wrong type");
3160   return mname->obj_field(_clazz_offset);
3161 }
3162 
3163 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3164   assert(is_instance(mname), "wrong type");
3165   mname->obj_field_put(_clazz_offset, clazz);
3166 }
3167 
3168 oop java_lang_invoke_MemberName::name(oop mname) {
3169   assert(is_instance(mname), "wrong type");
3170   return mname->obj_field(_name_offset);
3171 }
3172 
3173 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3174   assert(is_instance(mname), "wrong type");
3175   mname->obj_field_put(_name_offset, name);
3176 }
3177 
3178 oop java_lang_invoke_MemberName::type(oop mname) {
3179   assert(is_instance(mname), "wrong type");
3180   return mname->obj_field(_type_offset);
3181 }
3182 
3183 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3184   assert(is_instance(mname), "wrong type");
3185   mname->obj_field_put(_type_offset, type);
3186 }
3187 
3188 int java_lang_invoke_MemberName::flags(oop mname) {
3189   assert(is_instance(mname), "wrong type");
3190   return mname->int_field(_flags_offset);
3191 }
3192 
3193 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3194   assert(is_instance(mname), "wrong type");
3195   mname->int_field_put(_flags_offset, flags);
3196 }
3197 
3198 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
3199   assert(is_instance(mname), "wrong type");
3200   return (Metadata*)mname->address_field(_vmtarget_offset);
3201 }
3202 
3203 bool java_lang_invoke_MemberName::is_method(oop mname) {
3204   assert(is_instance(mname), "must be MemberName");
3205   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3206 }
3207 
3208 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
3209   assert(is_instance(mname), "wrong type");
3210   // check the type of the vmtarget
3211   oop dependency = NULL;
3212   if (ref != NULL) {
3213     switch (flags(mname) & (MN_IS_METHOD |
3214                             MN_IS_CONSTRUCTOR |
3215                             MN_IS_FIELD)) {
3216     case MN_IS_METHOD:
3217     case MN_IS_CONSTRUCTOR:
3218       assert(ref->is_method(), "should be a method");
3219       dependency = ((Method*)ref)->method_holder()->java_mirror();
3220       break;
3221     case MN_IS_FIELD:
3222       assert(ref->is_klass(), "should be a class");
3223       dependency = ((Klass*)ref)->java_mirror();
3224       break;
3225     default:
3226       ShouldNotReachHere();
3227     }
3228   }
3229   mname->address_field_put(_vmtarget_offset, (address)ref);
3230   // Add a reference to the loader (actually mirror because anonymous classes will not have
3231   // distinct loaders) to ensure the metadata is kept alive
3232   // This mirror may be different than the one in clazz field.
3233   mname->obj_field_put(_vmloader_offset, dependency);
3234 }
3235 
3236 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3237   assert(is_instance(mname), "wrong type");
3238   return (intptr_t) mname->address_field(_vmindex_offset);
3239 }
3240 
3241 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3242   assert(is_instance(mname), "wrong type");
3243   mname->address_field_put(_vmindex_offset, (address) index);
3244 }
3245 
3246 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) {
3247   if (mn1 == mn2) {
3248      return true;
3249   }
3250   return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) &&
3251           vmindex(mn1) == vmindex(mn2) &&
3252           clazz(mn1) == clazz(mn2));
3253 }
3254 
3255 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3256   assert(is_instance(lform), "wrong type");
3257   return lform->obj_field(_vmentry_offset);
3258 }
3259 
3260 
3261 // Support for java_lang_invoke_MethodType
3262 
3263 int java_lang_invoke_MethodType::_rtype_offset;
3264 int java_lang_invoke_MethodType::_ptypes_offset;
3265 
3266 void java_lang_invoke_MethodType::compute_offsets() {
3267   Klass* k = SystemDictionary::MethodType_klass();
3268   if (k != NULL) {
3269     compute_offset(_rtype_offset,  k, vmSymbols::rtype_name(),  vmSymbols::class_signature());
3270     compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
3271   }
3272 }
3273 
3274 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3275   st->print("(");
3276   objArrayOop pts = ptypes(mt);
3277   for (int i = 0, limit = pts->length(); i < limit; i++) {
3278     java_lang_Class::print_signature(pts->obj_at(i), st);
3279   }
3280   st->print(")");
3281   java_lang_Class::print_signature(rtype(mt), st);
3282 }
3283 
3284 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3285   ResourceMark rm;
3286   stringStream buffer(128);
3287   print_signature(mt, &buffer);
3288   const char* sigstr =       buffer.base();
3289   int         siglen = (int) buffer.size();
3290   Symbol *name;
3291   if (!intern_if_not_found) {
3292     name = SymbolTable::probe(sigstr, siglen);
3293   } else {
3294     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3295   }
3296   return name;
3297 }
3298 
3299 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3300   if (mt1 == mt2)
3301     return true;
3302   if (rtype(mt1) != rtype(mt2))
3303     return false;
3304   if (ptype_count(mt1) != ptype_count(mt2))
3305     return false;
3306   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3307     if (ptype(mt1, i) != ptype(mt2, i))
3308       return false;
3309   }
3310   return true;
3311 }
3312 
3313 oop java_lang_invoke_MethodType::rtype(oop mt) {
3314   assert(is_instance(mt), "must be a MethodType");
3315   return mt->obj_field(_rtype_offset);
3316 }
3317 
3318 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3319   assert(is_instance(mt), "must be a MethodType");
3320   return (objArrayOop) mt->obj_field(_ptypes_offset);
3321 }
3322 
3323 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3324   return ptypes(mt)->obj_at(idx);
3325 }
3326 
3327 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3328   return ptypes(mt)->length();
3329 }
3330 
3331 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3332   objArrayOop pts = ptypes(mt);
3333   int count = pts->length();
3334   int slots = 0;
3335   for (int i = 0; i < count; i++) {
3336     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3337     slots += type2size[bt];
3338   }
3339   return slots;
3340 }
3341 
3342 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3343   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3344   return type2size[bt];
3345 }
3346 
3347 
3348 // Support for java_lang_invoke_CallSite
3349 
3350 int java_lang_invoke_CallSite::_target_offset;
3351 int java_lang_invoke_CallSite::_context_offset;
3352 
3353 void java_lang_invoke_CallSite::compute_offsets() {
3354   Klass* k = SystemDictionary::CallSite_klass();
3355   if (k != NULL) {
3356     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3357     compute_offset(_context_offset, k, vmSymbols::context_name(),
3358                    vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3359   }
3360 }
3361 
3362 oop java_lang_invoke_CallSite::context(oop call_site) {
3363   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3364 
3365   oop dep_oop = call_site->obj_field(_context_offset);
3366   return dep_oop;
3367 }
3368 
3369 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3370 
3371 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3372 
3373 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3374   Klass* k = SystemDictionary::Context_klass();
3375   if (k != NULL) {
3376     CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3377   }
3378 }
3379 
3380 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3381   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3382   intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset);
3383   DependencyContext dep_ctx(vmdeps_addr);
3384   return dep_ctx;
3385 }
3386 
3387 // Support for java_security_AccessControlContext
3388 
3389 int java_security_AccessControlContext::_context_offset = 0;
3390 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3391 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3392 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3393 
3394 void java_security_AccessControlContext::compute_offsets() {
3395   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3396   fieldDescriptor fd;
3397   InstanceKlass* ik = SystemDictionary::AccessControlContext_klass();
3398 
3399   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3400     fatal("Invalid layout of java.security.AccessControlContext");
3401   }
3402   _context_offset = fd.offset();
3403 
3404   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3405     fatal("Invalid layout of java.security.AccessControlContext");
3406   }
3407   _privilegedContext_offset = fd.offset();
3408 
3409   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3410     fatal("Invalid layout of java.security.AccessControlContext");
3411   }
3412   _isPrivileged_offset = fd.offset();
3413 
3414   // The offset may not be present for bootstrapping with older JDK.
3415   if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3416     _isAuthorized_offset = fd.offset();
3417   }
3418 }
3419 
3420 
3421 bool java_security_AccessControlContext::is_authorized(Handle context) {
3422   assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3423   assert(_isAuthorized_offset != -1, "should be set");
3424   return context->bool_field(_isAuthorized_offset) != 0;
3425 }
3426 
3427 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3428   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3429   // Ensure klass is initialized
3430   SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3431   // Allocate result
3432   oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3433   // Fill in values
3434   result->obj_field_put(_context_offset, context());
3435   result->obj_field_put(_privilegedContext_offset, privileged_context());
3436   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3437   // whitelist AccessControlContexts created by the JVM if present
3438   if (_isAuthorized_offset != -1) {
3439     result->bool_field_put(_isAuthorized_offset, true);
3440   }
3441   return result;
3442 }
3443 
3444 
3445 // Support for java_lang_ClassLoader
3446 
3447 bool java_lang_ClassLoader::offsets_computed = false;
3448 int  java_lang_ClassLoader::_loader_data_offset = -1;
3449 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3450 int  java_lang_ClassLoader::name_offset = -1;
3451 int  java_lang_ClassLoader::unnamedModule_offset = -1;
3452 
3453 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3454     assert(loader != NULL && loader->is_oop(), "loader must be oop");
3455     return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3456 }
3457 
3458 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3459   return *java_lang_ClassLoader::loader_data_addr(loader);
3460 }
3461 
3462 void java_lang_ClassLoader::compute_offsets() {
3463   assert(!offsets_computed, "offsets should be initialized only once");
3464   offsets_computed = true;
3465 
3466   // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3467   Klass* k1 = SystemDictionary::ClassLoader_klass();
3468   compute_optional_offset(parallelCapable_offset,
3469     k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3470 
3471   compute_offset(name_offset,
3472     k1, vmSymbols::name_name(), vmSymbols::string_signature());
3473 
3474   compute_offset(unnamedModule_offset,
3475     k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature());
3476 
3477   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3478 }
3479 
3480 oop java_lang_ClassLoader::parent(oop loader) {
3481   assert(is_instance(loader), "loader must be oop");
3482   return loader->obj_field(parent_offset);
3483 }
3484 
3485 oop java_lang_ClassLoader::name(oop loader) {
3486   assert(is_instance(loader), "loader must be oop");
3487   return loader->obj_field(name_offset);
3488 }
3489 
3490 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3491   assert(is_instance(loader), "loader must be oop");
3492   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3493   oop acl = loader;
3494   debug_only(jint loop_count = 0);
3495   // This loop taken verbatim from ClassLoader.java:
3496   do {
3497     acl = parent(acl);
3498     if (cl == acl) {
3499       return true;
3500     }
3501     assert(++loop_count > 0, "loop_count overflow");
3502   } while (acl != NULL);
3503   return false;
3504 }
3505 
3506 bool java_lang_ClassLoader::is_instance(oop obj) {
3507   return obj != NULL && is_subclass(obj->klass());
3508 }
3509 
3510 
3511 // For class loader classes, parallelCapable defined
3512 // based on non-null field
3513 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3514 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3515   if (parallelCapable_offset == -1) {
3516      // Default for backward compatibility is false
3517      return false;
3518   }
3519   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3520 }
3521 
3522 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3523   // Fix for 4474172; see evaluation for more details
3524   loader = non_reflection_class_loader(loader);
3525 
3526   oop cl = SystemDictionary::java_system_loader();
3527   while(cl != NULL) {
3528     if (cl == loader) return true;
3529     cl = parent(cl);
3530   }
3531   return false;
3532 }
3533 
3534 // Return true if this is one of the class loaders associated with
3535 // the generated bytecodes for reflection.
3536 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3537   if (loader != NULL) {
3538     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3539     // This might be null in non-1.4 JDKs
3540     return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3541   }
3542   return false;
3543 }
3544 
3545 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3546   // See whether this is one of the class loaders associated with
3547   // the generated bytecodes for reflection, and if so, "magically"
3548   // delegate to its parent to prevent class loading from occurring
3549   // in places where applications using reflection didn't expect it.
3550   if (is_reflection_class_loader(loader)) {
3551     return parent(loader);
3552   }
3553   return loader;
3554 }
3555 
3556 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3557   assert(is_instance(loader), "loader must be oop");
3558   return loader->obj_field(unnamedModule_offset);
3559 }
3560 
3561 // Support for java_lang_System
3562 int java_lang_System::in_offset_in_bytes() {
3563   return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3564 }
3565 
3566 
3567 int java_lang_System::out_offset_in_bytes() {
3568   return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3569 }
3570 
3571 
3572 int java_lang_System::err_offset_in_bytes() {
3573   return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3574 }
3575 
3576 
3577 bool java_lang_System::has_security_manager() {
3578   InstanceKlass* ik = SystemDictionary::System_klass();
3579   address addr = ik->static_field_addr(static_security_offset);
3580   if (UseCompressedOops) {
3581     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3582   } else {
3583     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3584   }
3585 }
3586 
3587 int java_lang_Class::_klass_offset;
3588 int java_lang_Class::_array_klass_offset;
3589 int java_lang_Class::_oop_size_offset;
3590 int java_lang_Class::_static_oop_field_count_offset;
3591 int java_lang_Class::_class_loader_offset;
3592 int java_lang_Class::_module_offset;
3593 int java_lang_Class::_protection_domain_offset;
3594 int java_lang_Class::_component_mirror_offset;
3595 int java_lang_Class::_init_lock_offset;
3596 int java_lang_Class::_signers_offset;
3597 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3598 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3599 int java_lang_Throwable::backtrace_offset;
3600 int java_lang_Throwable::detailMessage_offset;
3601 int java_lang_Throwable::stackTrace_offset;
3602 int java_lang_Throwable::depth_offset;
3603 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3604 int java_lang_reflect_AccessibleObject::override_offset;
3605 int java_lang_reflect_Method::clazz_offset;
3606 int java_lang_reflect_Method::name_offset;
3607 int java_lang_reflect_Method::returnType_offset;
3608 int java_lang_reflect_Method::parameterTypes_offset;
3609 int java_lang_reflect_Method::exceptionTypes_offset;
3610 int java_lang_reflect_Method::slot_offset;
3611 int java_lang_reflect_Method::modifiers_offset;
3612 int java_lang_reflect_Method::signature_offset;
3613 int java_lang_reflect_Method::annotations_offset;
3614 int java_lang_reflect_Method::parameter_annotations_offset;
3615 int java_lang_reflect_Method::annotation_default_offset;
3616 int java_lang_reflect_Method::type_annotations_offset;
3617 int java_lang_reflect_Constructor::clazz_offset;
3618 int java_lang_reflect_Constructor::parameterTypes_offset;
3619 int java_lang_reflect_Constructor::exceptionTypes_offset;
3620 int java_lang_reflect_Constructor::slot_offset;
3621 int java_lang_reflect_Constructor::modifiers_offset;
3622 int java_lang_reflect_Constructor::signature_offset;
3623 int java_lang_reflect_Constructor::annotations_offset;
3624 int java_lang_reflect_Constructor::parameter_annotations_offset;
3625 int java_lang_reflect_Constructor::type_annotations_offset;
3626 int java_lang_reflect_Field::clazz_offset;
3627 int java_lang_reflect_Field::name_offset;
3628 int java_lang_reflect_Field::type_offset;
3629 int java_lang_reflect_Field::slot_offset;
3630 int java_lang_reflect_Field::modifiers_offset;
3631 int java_lang_reflect_Field::signature_offset;
3632 int java_lang_reflect_Field::annotations_offset;
3633 int java_lang_reflect_Field::type_annotations_offset;
3634 int java_lang_reflect_Parameter::name_offset;
3635 int java_lang_reflect_Parameter::modifiers_offset;
3636 int java_lang_reflect_Parameter::index_offset;
3637 int java_lang_reflect_Parameter::executable_offset;
3638 int java_lang_boxing_object::value_offset;
3639 int java_lang_boxing_object::long_value_offset;
3640 int java_lang_ref_Reference::referent_offset;
3641 int java_lang_ref_Reference::queue_offset;
3642 int java_lang_ref_Reference::next_offset;
3643 int java_lang_ref_Reference::discovered_offset;
3644 int java_lang_ref_Reference::number_of_fake_oop_fields;
3645 int java_lang_ref_SoftReference::timestamp_offset;
3646 int java_lang_ref_SoftReference::static_clock_offset;
3647 int java_lang_ClassLoader::parent_offset;
3648 int java_lang_System::static_in_offset;
3649 int java_lang_System::static_out_offset;
3650 int java_lang_System::static_err_offset;
3651 int java_lang_System::static_security_offset;
3652 int java_lang_StackTraceElement::methodName_offset;
3653 int java_lang_StackTraceElement::fileName_offset;
3654 int java_lang_StackTraceElement::lineNumber_offset;
3655 int java_lang_StackTraceElement::moduleName_offset;
3656 int java_lang_StackTraceElement::moduleVersion_offset;
3657 int java_lang_StackTraceElement::classLoaderName_offset;
3658 int java_lang_StackTraceElement::declaringClass_offset;
3659 int java_lang_StackTraceElement::declaringClassObject_offset;
3660 int java_lang_StackFrameInfo::_declaringClass_offset;
3661 int java_lang_StackFrameInfo::_memberName_offset;
3662 int java_lang_StackFrameInfo::_bci_offset;
3663 int java_lang_StackFrameInfo::_version_offset;
3664 int java_lang_LiveStackFrameInfo::_monitors_offset;
3665 int java_lang_LiveStackFrameInfo::_locals_offset;
3666 int java_lang_LiveStackFrameInfo::_operands_offset;
3667 int java_lang_LiveStackFrameInfo::_mode_offset;
3668 int java_lang_AssertionStatusDirectives::classes_offset;
3669 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3670 int java_lang_AssertionStatusDirectives::packages_offset;
3671 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3672 int java_lang_AssertionStatusDirectives::deflt_offset;
3673 int java_nio_Buffer::_limit_offset;
3674 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3675 int reflect_ConstantPool::_oop_offset;
3676 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3677 
3678 
3679 // Support for java_lang_StackTraceElement
3680 
3681 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3682   element->obj_field_put(fileName_offset, value);
3683 }
3684 
3685 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3686   element->obj_field_put(declaringClass_offset, value);
3687 }
3688 
3689 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3690   element->obj_field_put(methodName_offset, value);
3691 }
3692 
3693 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3694   element->int_field_put(lineNumber_offset, value);
3695 }
3696 
3697 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3698   element->obj_field_put(moduleName_offset, value);
3699 }
3700 
3701 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3702   element->obj_field_put(moduleVersion_offset, value);
3703 }
3704 
3705 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
3706   element->obj_field_put(classLoaderName_offset, value);
3707 }
3708 
3709 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
3710   element->obj_field_put(declaringClassObject_offset, value);
3711 }
3712 
3713 // Support for java_lang_StackFrameInfo
3714 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
3715   element->obj_field_put(_declaringClass_offset, value);
3716 }
3717 
3718 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3719   element->short_field_put(_version_offset, value);
3720 }
3721 
3722 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3723   element->int_field_put(_bci_offset, value);
3724 }
3725 
3726 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3727   element->obj_field_put(_monitors_offset, value);
3728 }
3729 
3730 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3731   element->obj_field_put(_locals_offset, value);
3732 }
3733 
3734 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3735   element->obj_field_put(_operands_offset, value);
3736 }
3737 
3738 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3739   element->int_field_put(_mode_offset, value);
3740 }
3741 
3742 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3743 
3744 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3745   o->obj_field_put(classes_offset, val);
3746 }
3747 
3748 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3749   o->obj_field_put(classEnabled_offset, val);
3750 }
3751 
3752 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3753   o->obj_field_put(packages_offset, val);
3754 }
3755 
3756 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3757   o->obj_field_put(packageEnabled_offset, val);
3758 }
3759 
3760 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3761   o->bool_field_put(deflt_offset, val);
3762 }
3763 
3764 
3765 // Support for intrinsification of java.nio.Buffer.checkIndex
3766 int java_nio_Buffer::limit_offset() {
3767   return _limit_offset;
3768 }
3769 
3770 
3771 void java_nio_Buffer::compute_offsets() {
3772   Klass* k = SystemDictionary::nio_Buffer_klass();
3773   assert(k != NULL, "must be loaded in 1.4+");
3774   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3775 }
3776 
3777 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3778   if (_owner_offset != 0) return;
3779 
3780   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3781   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3782   compute_offset(_owner_offset, k,
3783                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3784 }
3785 
3786 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3787   assert(_owner_offset != 0, "Must be initialized");
3788   return obj->obj_field(_owner_offset);
3789 }
3790 
3791 // Compute hard-coded offsets
3792 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3793 // are not available to determine the offset_of_static_fields.
3794 void JavaClasses::compute_hard_coded_offsets() {
3795   const int x = heapOopSize;
3796   const int header = instanceOopDesc::base_offset_in_bytes();
3797 
3798   // Throwable Class
3799   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3800   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3801   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3802   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3803 
3804   // java_lang_boxing_object
3805   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3806   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3807 
3808   // java_lang_ref_Reference:
3809   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3810   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3811   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3812   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3813   // Artificial fields for java_lang_ref_Reference
3814   // The first field is for the discovered field added in 1.4
3815   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3816 
3817   // java_lang_ref_SoftReference Class
3818   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3819   // Don't multiply static fields because they are always in wordSize units
3820   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3821 
3822   // java_lang_ClassLoader
3823   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3824 
3825   // java_lang_System
3826   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
3827   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3828   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3829   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3830 
3831   // java_lang_StackTraceElement
3832   java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header;
3833   java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header;
3834   java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header;
3835   java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header;
3836   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3837   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3838   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3839   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3840   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3841   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3842   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3843   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3844   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3845 
3846 }
3847 
3848 
3849 // Compute non-hard-coded field offsets of all the classes in this file
3850 void JavaClasses::compute_offsets() {
3851   // java_lang_Class::compute_offsets was called earlier in bootstrap
3852   java_lang_ClassLoader::compute_offsets();
3853   java_lang_Throwable::compute_offsets();
3854   java_lang_Thread::compute_offsets();
3855   java_lang_ThreadGroup::compute_offsets();
3856   java_lang_invoke_MethodHandle::compute_offsets();
3857   java_lang_invoke_DirectMethodHandle::compute_offsets();
3858   java_lang_invoke_MemberName::compute_offsets();
3859   java_lang_invoke_LambdaForm::compute_offsets();
3860   java_lang_invoke_MethodType::compute_offsets();
3861   java_lang_invoke_CallSite::compute_offsets();
3862   java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3863   java_security_AccessControlContext::compute_offsets();
3864   // Initialize reflection classes. The layouts of these classes
3865   // changed with the new reflection implementation in JDK 1.4, and
3866   // since the Universe doesn't know what JDK version it is until this
3867   // point we defer computation of these offsets until now.
3868   java_lang_reflect_AccessibleObject::compute_offsets();
3869   java_lang_reflect_Method::compute_offsets();
3870   java_lang_reflect_Constructor::compute_offsets();
3871   java_lang_reflect_Field::compute_offsets();
3872   java_nio_Buffer::compute_offsets();
3873   reflect_ConstantPool::compute_offsets();
3874   reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3875   java_lang_reflect_Parameter::compute_offsets();
3876   java_lang_reflect_Module::compute_offsets();
3877   java_lang_StackFrameInfo::compute_offsets();
3878   java_lang_LiveStackFrameInfo::compute_offsets();
3879 
3880   // generated interpreter code wants to know about the offsets we just computed:
3881   AbstractAssembler::update_delayed_values();
3882 }
3883 
3884 #ifndef PRODUCT
3885 
3886 // These functions exist to assert the validity of hard-coded field offsets to guard
3887 // against changes in the class files
3888 
3889 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3890   EXCEPTION_MARK;
3891   fieldDescriptor fd;
3892   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3893   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3894   InstanceKlass* ik = InstanceKlass::cast(k);
3895   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3896   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3897   if (!ik->find_local_field(f_name, f_sig, &fd)) {
3898     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3899     return false;
3900   }
3901   if (fd.is_static()) {
3902     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3903     return false;
3904   }
3905   if (fd.offset() == hardcoded_offset ) {
3906     return true;
3907   } else {
3908     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3909                   klass_name, field_name, hardcoded_offset, fd.offset());
3910     return false;
3911   }
3912 }
3913 
3914 
3915 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3916   EXCEPTION_MARK;
3917   fieldDescriptor fd;
3918   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3919   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3920   InstanceKlass* ik = InstanceKlass::cast(k);
3921   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3922   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3923   if (!ik->find_local_field(f_name, f_sig, &fd)) {
3924     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3925     return false;
3926   }
3927   if (!fd.is_static()) {
3928     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3929     return false;
3930   }
3931   if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3932     return true;
3933   } else {
3934     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());
3935     return false;
3936   }
3937 }
3938 
3939 
3940 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3941   EXCEPTION_MARK;
3942   fieldDescriptor fd;
3943   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3944   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3945   InstanceKlass* ik = InstanceKlass::cast(k);
3946   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3947   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3948   if (!ik->find_local_field(f_name, f_sig, &fd)) {
3949     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3950     return false;
3951   }
3952   if (!fd.is_static() || !fd.has_initial_value()) {
3953     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3954     return false;
3955   }
3956   if (!fd.initial_value_tag().is_int()) {
3957     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3958     return false;
3959   }
3960   jint field_value = fd.int_initial_value();
3961   if (field_value == hardcoded_constant) {
3962     return true;
3963   } else {
3964     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);
3965     return false;
3966   }
3967 }
3968 
3969 
3970 // Check the hard-coded field offsets of all the classes in this file
3971 
3972 void JavaClasses::check_offsets() {
3973   bool valid = true;
3974 
3975 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3976   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3977 
3978 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3979   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3980 
3981 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3982   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3983 
3984 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3985   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3986 
3987   // java.lang.String
3988 
3989   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3990   CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3991   CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3992 
3993   // java.lang.Class
3994 
3995   // Fake fields
3996   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3997   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3998 
3999   // java.lang.Throwable
4000 
4001   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
4002   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
4003   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
4004   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
4005 
4006   // Boxed primitive objects (java_lang_boxing_object)
4007 
4008   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
4009   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4010   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
4011   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4012   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
4013   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
4014   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
4015   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4016 
4017   // java.lang.ClassLoader
4018 
4019   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,        "Ljava/lang/ClassLoader;");
4020 
4021   // java.lang.System
4022 
4023   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
4024   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
4025   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
4026   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
4027 
4028   // java.lang.StackTraceElement
4029 
4030   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;");
4031   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;");
4032   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName,      "Ljava/lang/String;");
4033   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion,   "Ljava/lang/String;");
4034   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass,  "Ljava/lang/String;");
4035   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName,      "Ljava/lang/String;");
4036   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName,        "Ljava/lang/String;");
4037   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber,      "I");
4038 
4039   // java.lang.ref.Reference
4040 
4041   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4042   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4043   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4044   // Fake field
4045   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4046 
4047   // java.lang.ref.SoftReference
4048 
4049   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
4050   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
4051 
4052   // java.lang.AssertionStatusDirectives
4053   //
4054   // The CheckAssertionStatusDirectives boolean can be removed from here and
4055   // globals.hpp after the AssertionStatusDirectives class has been integrated
4056   // into merlin "for some time."  Without it, the vm will fail with early
4057   // merlin builds.
4058 
4059   if (CheckAssertionStatusDirectives) {
4060     const char* nm = "java/lang/AssertionStatusDirectives";
4061     const char* sig = "[Ljava/lang/String;";
4062     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
4063     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
4064     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
4065     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
4066     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
4067   }
4068 
4069   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4070 }
4071 
4072 #endif // PRODUCT
4073 
4074 int InjectedField::compute_offset() {
4075   InstanceKlass* ik = InstanceKlass::cast(klass());
4076   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4077     if (!may_be_java && !fs.access_flags().is_internal()) {
4078       // Only look at injected fields
4079       continue;
4080     }
4081     if (fs.name() == name() && fs.signature() == signature()) {
4082       return fs.offset();
4083     }
4084   }
4085   ResourceMark rm;
4086   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)" : "");
4087 #ifndef PRODUCT
4088   ik->print();
4089   tty->print_cr("all fields:");
4090   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4091     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4092   }
4093 #endif //PRODUCT
4094   vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4095   return -1;
4096 }
4097 
4098 void javaClasses_init() {
4099   JavaClasses::compute_offsets();
4100   JavaClasses::check_offsets();
4101   FilteredFieldsMap::initialize();  // must be done after computing offsets.
4102 }