1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/altHashing.hpp"
  27 #include "classfile/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 "interpreter/linkResolver.hpp"
  37 #include "logging/log.hpp"
  38 #include "logging/logStream.hpp"
  39 #include "memory/heapShared.inline.hpp"
  40 #include "memory/metaspaceShared.hpp"
  41 #include "memory/oopFactory.hpp"
  42 #include "memory/resourceArea.hpp"
  43 #include "memory/universe.hpp"
  44 #include "oops/fieldStreams.hpp"
  45 #include "oops/instanceKlass.hpp"
  46 #include "oops/instanceMirrorKlass.hpp"
  47 #include "oops/klass.hpp"
  48 #include "oops/method.inline.hpp"
  49 #include "oops/objArrayOop.inline.hpp"
  50 #include "oops/oop.inline.hpp"
  51 #include "oops/symbol.hpp"
  52 #include "oops/typeArrayOop.inline.hpp"
  53 #include "prims/jvmtiExport.hpp"
  54 #include "prims/resolvedMethodTable.hpp"
  55 #include "runtime/fieldDescriptor.inline.hpp"
  56 #include "runtime/frame.inline.hpp"
  57 #include "runtime/handles.inline.hpp"
  58 #include "runtime/interfaceSupport.inline.hpp"
  59 #include "runtime/java.hpp"
  60 #include "runtime/javaCalls.hpp"
  61 #include "runtime/jniHandles.inline.hpp"
  62 #include "runtime/safepoint.hpp"
  63 #include "runtime/safepointVerifiers.hpp"
  64 #include "runtime/thread.inline.hpp"
  65 #include "runtime/vframe.inline.hpp"
  66 #include "utilities/align.hpp"
  67 #include "utilities/preserveException.hpp"
  68 #if INCLUDE_JVMCI
  69 #include "jvmci/jvmciJavaClasses.hpp"
  70 #endif
  71 
  72 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  73   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  74 
  75 #if INCLUDE_CDS
  76 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
  77   f->do_u4((u4*)&_##name##_offset);
  78 #endif
  79 
  80 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  81   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  82 
  83 InjectedField JavaClasses::_injected_fields[] = {
  84   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  85 };
  86 
  87 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  88   return _injected_fields[id].compute_offset();
  89 }
  90 
  91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  92   *field_count = 0;
  93 
  94   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  95   if (sid == vmSymbols::NO_SID) {
  96     // Only well known classes can inject fields
  97     return NULL;
  98   }
  99 
 100   int count = 0;
 101   int start = -1;
 102 
 103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 104   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
 105     count++;                                                       \
 106     if (start == -1) start = klass##_##name##_enum;                \
 107   }
 108   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 109 #undef LOOKUP_INJECTED_FIELD
 110 
 111   if (start != -1) {
 112     *field_count = count;
 113     return _injected_fields + start;
 114   }
 115   return NULL;
 116 }
 117 
 118 
 119 // Helpful routine for computing field offsets at run time rather than hardcoding them
 120 // Finds local fields only, including static fields.  Static field offsets are from the
 121 // beginning of the mirror.
 122 static void compute_offset(int &dest_offset,
 123                            InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 124                            bool is_static = false) {
 125   fieldDescriptor fd;
 126   if (ik == NULL) {
 127     ResourceMark rm;
 128     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 129     vm_exit_during_initialization("Invalid layout of well-known class");
 130   }
 131 
 132   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 133     ResourceMark rm;
 134     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 135                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 136 #ifndef PRODUCT
 137     // Prints all fields and offsets
 138     Log(class) lt;
 139     LogStream ls(lt.error());
 140     ik->print_on(&ls);
 141 #endif //PRODUCT
 142     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 143   }
 144   dest_offset = fd.offset();
 145 }
 146 
 147 // Overloading to pass name as a string.
 148 static void compute_offset(int& dest_offset, InstanceKlass* ik,
 149                            const char* name_string, Symbol* signature_symbol,
 150                            bool is_static = false) {
 151   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 152   if (name == NULL) {
 153     ResourceMark rm;
 154     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 155     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 156   }
 157   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 158 }
 159 
 160 int java_lang_String::value_offset  = 0;
 161 int java_lang_String::hash_offset   = 0;
 162 int java_lang_String::coder_offset  = 0;
 163 
 164 bool java_lang_String::initialized  = false;
 165 
 166 bool java_lang_String::is_instance(oop obj) {
 167   return is_instance_inlined(obj);
 168 }
 169 
 170 #if INCLUDE_CDS
 171 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
 172   f->do_u4((u4*)&offset)
 173 #endif
 174 
 175 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
 176   compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
 177 
 178 #define STRING_FIELDS_DO(macro) \
 179   macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 180   macro(hash_offset,  k, "hash",                  int_signature,        false); \
 181   macro(coder_offset, k, "coder",                 byte_signature,       false)
 182 
 183 void java_lang_String::compute_offsets() {
 184   if (initialized) {
 185     return;
 186   }
 187 
 188   InstanceKlass* k = SystemDictionary::String_klass();
 189   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 190 
 191   initialized = true;
 192 }
 193 
 194 #if INCLUDE_CDS
 195 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 196   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 197   f->do_u4((u4*)&initialized);
 198 }
 199 #endif
 200 
 201 class CompactStringsFixup : public FieldClosure {
 202 private:
 203   bool _value;
 204 
 205 public:
 206   CompactStringsFixup(bool value) : _value(value) {}
 207 
 208   void do_field(fieldDescriptor* fd) {
 209     if (fd->name() == vmSymbols::compact_strings_name()) {
 210       oop mirror = fd->field_holder()->java_mirror();
 211       assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
 212       assert(mirror != NULL, "String must have mirror already");
 213       mirror->bool_field_put(fd->offset(), _value);
 214     }
 215   }
 216 };
 217 
 218 void java_lang_String::set_compact_strings(bool value) {
 219   CompactStringsFixup fix(value);
 220   InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
 221 }
 222 
 223 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 224   assert(initialized, "Must be initialized");
 225   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 226 
 227   // Create the String object first, so there's a chance that the String
 228   // and the char array it points to end up in the same cache line.
 229   oop obj;
 230   obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
 231 
 232   // Create the char array.  The String object must be handlized here
 233   // because GC can happen as a result of the allocation attempt.
 234   Handle h_obj(THREAD, obj);
 235   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 236   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 237 
 238   // Point the String at the char array
 239   obj = h_obj();
 240   set_value(obj, buffer);
 241   // No need to zero the offset, allocation zero'ed the entire String object
 242   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 243   return h_obj;
 244 }
 245 
 246 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 247   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 248   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 249   typeArrayOop buffer = value(h_obj());
 250   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 251   if (is_latin1) {
 252     for (int index = 0; index < length; index++) {
 253       buffer->byte_at_put(index, (jbyte)unicode[index]);
 254     }
 255   } else {
 256     for (int index = 0; index < length; index++) {
 257       buffer->char_at_put(index, unicode[index]);
 258     }
 259   }
 260 
 261 #ifdef ASSERT
 262   {
 263     ResourceMark rm;
 264     char* expected = UNICODE::as_utf8(unicode, length);
 265     char* actual = as_utf8_string(h_obj());
 266     if (strcmp(expected, actual) != 0) {
 267       tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
 268       ShouldNotReachHere();
 269     }
 270   }
 271 #endif
 272 
 273   return h_obj;
 274 }
 275 
 276 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 277   Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
 278   return h_obj();
 279 }
 280 
 281 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 282   if (utf8_str == NULL) {
 283     return Handle();
 284   }
 285   bool has_multibyte, is_latin1;
 286   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 287   if (!CompactStrings) {
 288     has_multibyte = true;
 289     is_latin1 = false;
 290   }
 291 
 292   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 293   if (length > 0) {
 294     if (!has_multibyte) {
 295       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 296       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 297     } else if (is_latin1) {
 298       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 299     } else {
 300       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 301     }
 302   }
 303 
 304 #ifdef ASSERT
 305   // This check is too strict because the input string is not necessarily valid UTF8.
 306   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 307   /*
 308   {
 309     ResourceMark rm;
 310     const char* expected = utf8_str;
 311     char* actual = as_utf8_string(h_obj());
 312     if (strcmp(expected, actual) != 0) {
 313       tty->print_cr("String conversion failure: %s --> %s", expected, actual);
 314       ShouldNotReachHere();
 315     }
 316   }
 317   */
 318 #endif
 319 
 320   return h_obj;
 321 }
 322 
 323 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 324   Handle h_obj = create_from_str(utf8_str, CHECK_0);
 325   return h_obj();
 326 }
 327 
 328 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 329   const char* utf8_str = (char*)symbol->bytes();
 330   int utf8_len = symbol->utf8_length();
 331 
 332   bool has_multibyte, is_latin1;
 333   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 334   if (!CompactStrings) {
 335     has_multibyte = true;
 336     is_latin1 = false;
 337   }
 338 
 339   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 340   if (length > 0) {
 341     if (!has_multibyte) {
 342       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 343       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 344     } else if (is_latin1) {
 345       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 346     } else {
 347       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 348     }
 349   }
 350 
 351 #ifdef ASSERT
 352   {
 353     ResourceMark rm;
 354     const char* expected = symbol->as_utf8();
 355     char* actual = as_utf8_string(h_obj());
 356     if (strncmp(expected, actual, utf8_len) != 0) {
 357       tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
 358       ShouldNotReachHere();
 359     }
 360   }
 361 #endif
 362 
 363   return h_obj;
 364 }
 365 
 366 // Converts a C string to a Java String based on current encoding
 367 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 368   assert(str != NULL, "bad arguments");
 369 
 370   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 371   static to_java_string_fn_t _to_java_string_fn = NULL;
 372 
 373   if (_to_java_string_fn == NULL) {
 374     void *lib_handle = os::native_java_library();
 375     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 376     if (_to_java_string_fn == NULL) {
 377       fatal("NewStringPlatform missing");
 378     }
 379   }
 380 
 381   jstring js = NULL;
 382   { JavaThread* thread = (JavaThread*)THREAD;
 383     assert(thread->is_Java_thread(), "must be java thread");
 384     HandleMark hm(thread);
 385     ThreadToNativeFromVM ttn(thread);
 386     js = (_to_java_string_fn)(thread->jni_environment(), str);
 387   }
 388   return Handle(THREAD, JNIHandles::resolve(js));
 389 }
 390 
 391 // Converts a Java String to a native C string that can be used for
 392 // native OS calls.
 393 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 394   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 395   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 396 
 397   if (_to_platform_string_fn == NULL) {
 398     void *lib_handle = os::native_java_library();
 399     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 400     if (_to_platform_string_fn == NULL) {
 401       fatal("GetStringPlatformChars missing");
 402     }
 403   }
 404 
 405   char *native_platform_string;
 406   { JavaThread* thread = (JavaThread*)THREAD;
 407     assert(thread->is_Java_thread(), "must be java thread");
 408     JNIEnv *env = thread->jni_environment();
 409     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 410     bool is_copy;
 411     HandleMark hm(thread);
 412     ThreadToNativeFromVM ttn(thread);
 413     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 414     assert(is_copy == JNI_TRUE, "is_copy value changed");
 415     JNIHandles::destroy_local(js);
 416   }
 417   return native_platform_string;
 418 }
 419 
 420 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 421   oop          obj    = java_string();
 422   // Typical usage is to convert all '/' to '.' in string.
 423   typeArrayOop value  = java_lang_String::value(obj);
 424   int          length = java_lang_String::length(obj);
 425   bool      is_latin1 = java_lang_String::is_latin1(obj);
 426 
 427   // First check if any from_char exist
 428   int index; // Declared outside, used later
 429   for (index = 0; index < length; index++) {
 430     jchar c = !is_latin1 ? value->char_at(index) :
 431                   ((jchar) value->byte_at(index)) & 0xff;
 432     if (c == from_char) {
 433       break;
 434     }
 435   }
 436   if (index == length) {
 437     // No from_char, so do not copy.
 438     return java_string;
 439   }
 440 
 441   // Check if result string will be latin1
 442   bool to_is_latin1 = false;
 443 
 444   // Replacement char must be latin1
 445   if (CompactStrings && UNICODE::is_latin1(to_char)) {
 446     if (is_latin1) {
 447       // Source string is latin1 as well
 448       to_is_latin1 = true;
 449     } else if (!UNICODE::is_latin1(from_char)) {
 450       // We are replacing an UTF16 char. Scan string to
 451       // check if result can be latin1 encoded.
 452       to_is_latin1 = true;
 453       for (index = 0; index < length; index++) {
 454         jchar c = value->char_at(index);
 455         if (c != from_char && !UNICODE::is_latin1(c)) {
 456           to_is_latin1 = false;
 457           break;
 458         }
 459       }
 460     }
 461   }
 462 
 463   // Create new UNICODE (or byte) buffer. Must handlize value because GC
 464   // may happen during String and char array creation.
 465   typeArrayHandle h_value(THREAD, value);
 466   Handle string = basic_create(length, to_is_latin1, CHECK_NH);
 467   typeArrayOop from_buffer = h_value();
 468   typeArrayOop to_buffer = java_lang_String::value(string());
 469 
 470   // Copy contents
 471   for (index = 0; index < length; index++) {
 472     jchar c = (!is_latin1) ? from_buffer->char_at(index) :
 473                     ((jchar) from_buffer->byte_at(index)) & 0xff;
 474     if (c == from_char) {
 475       c = to_char;
 476     }
 477     if (!to_is_latin1) {
 478       to_buffer->char_at_put(index, c);
 479     } else {
 480       to_buffer->byte_at_put(index, (jbyte) c);
 481     }
 482   }
 483   return string;
 484 }
 485 
 486 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 487   typeArrayOop value  = java_lang_String::value(java_string);
 488                length = java_lang_String::length(java_string);
 489   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 490 
 491   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 492   if (result != NULL) {
 493     if (!is_latin1) {
 494       for (int index = 0; index < length; index++) {
 495         result[index] = value->char_at(index);
 496       }
 497     } else {
 498       for (int index = 0; index < length; index++) {
 499         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 500       }
 501     }
 502   } else {
 503     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 504   }
 505   return result;
 506 }
 507 
 508 unsigned int java_lang_String::hash_code(oop java_string) {
 509   int          length = java_lang_String::length(java_string);
 510   // Zero length string will hash to zero with String.hashCode() function.
 511   if (length == 0) return 0;
 512 
 513   typeArrayOop value  = java_lang_String::value(java_string);
 514   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 515 
 516   if (is_latin1) {
 517     return java_lang_String::hash_code(value->byte_at_addr(0), length);
 518   } else {
 519     return java_lang_String::hash_code(value->char_at_addr(0), length);
 520   }
 521 }
 522 
 523 char* java_lang_String::as_quoted_ascii(oop java_string) {
 524   typeArrayOop value  = java_lang_String::value(java_string);
 525   int          length = java_lang_String::length(java_string);
 526   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 527 
 528   if (length == 0) return NULL;
 529 
 530   char* result;
 531   int result_length;
 532   if (!is_latin1) {
 533     jchar* base = value->char_at_addr(0);
 534     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 535     result = NEW_RESOURCE_ARRAY(char, result_length);
 536     UNICODE::as_quoted_ascii(base, length, result, result_length);
 537   } else {
 538     jbyte* base = value->byte_at_addr(0);
 539     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 540     result = NEW_RESOURCE_ARRAY(char, result_length);
 541     UNICODE::as_quoted_ascii(base, length, result, result_length);
 542   }
 543   assert(result_length >= length + 1, "must not be shorter");
 544   assert(result_length == (int)strlen(result) + 1, "must match");
 545   return result;
 546 }
 547 
 548 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
 549   typeArrayOop value  = java_lang_String::value(java_string);
 550   int          length = java_lang_String::length(java_string);
 551   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 552   if (!is_latin1) {
 553     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 554     Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
 555     return sym;
 556   } else {
 557     ResourceMark rm;
 558     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 559     const char* base = UNICODE::as_utf8(position, length);
 560     Symbol* sym = SymbolTable::lookup(base, length, THREAD);
 561     return sym;
 562   }
 563 }
 564 
 565 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 566   typeArrayOop value  = java_lang_String::value(java_string);
 567   int          length = java_lang_String::length(java_string);
 568   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 569   if (!is_latin1) {
 570     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 571     return SymbolTable::probe_unicode(base, length);
 572   } else {
 573     ResourceMark rm;
 574     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 575     const char* base = UNICODE::as_utf8(position, length);
 576     return SymbolTable::probe(base, length);
 577   }
 578 }
 579 
 580 int java_lang_String::utf8_length(oop java_string) {
 581   typeArrayOop value  = java_lang_String::value(java_string);
 582   int          length = java_lang_String::length(java_string);
 583   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 584   if (length == 0) {
 585     return 0;
 586   }
 587   if (!is_latin1) {
 588     return UNICODE::utf8_length(value->char_at_addr(0), length);
 589   } else {
 590     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 591   }
 592 }
 593 
 594 char* java_lang_String::as_utf8_string(oop java_string) {
 595   typeArrayOop value  = java_lang_String::value(java_string);
 596   int          length = java_lang_String::length(java_string);
 597   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 598   if (!is_latin1) {
 599     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 600     return UNICODE::as_utf8(position, length);
 601   } else {
 602     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 603     return UNICODE::as_utf8(position, length);
 604   }
 605 }
 606 
 607 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 608   typeArrayOop value  = java_lang_String::value(java_string);
 609   int          length = java_lang_String::length(java_string);
 610   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 611   if (!is_latin1) {
 612     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 613     return UNICODE::as_utf8(position, length, buf, buflen);
 614   } else {
 615     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 616     return UNICODE::as_utf8(position, length, buf, buflen);
 617   }
 618 }
 619 
 620 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 621   typeArrayOop value  = java_lang_String::value(java_string);
 622   int          length = java_lang_String::length(java_string);
 623   assert(start + len <= length, "just checking");
 624   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 625   if (!is_latin1) {
 626     jchar* position = value->char_at_addr(start);
 627     return UNICODE::as_utf8(position, len);
 628   } else {
 629     jbyte* position = value->byte_at_addr(start);
 630     return UNICODE::as_utf8(position, len);
 631   }
 632 }
 633 
 634 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
 635   typeArrayOop value  = java_lang_String::value(java_string);
 636   int          length = java_lang_String::length(java_string);
 637   assert(start + len <= length, "just checking");
 638   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 639   if (!is_latin1) {
 640     jchar* position = value->char_at_addr(start);
 641     return UNICODE::as_utf8(position, len, buf, buflen);
 642   } else {
 643     jbyte* position = value->byte_at_addr(start);
 644     return UNICODE::as_utf8(position, len, buf, buflen);
 645   }
 646 }
 647 
 648 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 649   assert(java_string->klass() == SystemDictionary::String_klass(),
 650          "must be java_string");
 651   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 652   int length = java_lang_String::length(java_string);
 653   if (length != len) {
 654     return false;
 655   }
 656   bool is_latin1 = java_lang_String::is_latin1(java_string);
 657   if (!is_latin1) {
 658     for (int i = 0; i < len; i++) {
 659       if (value->char_at(i) != chars[i]) {
 660         return false;
 661       }
 662     }
 663   } else {
 664     for (int i = 0; i < len; i++) {
 665       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 666         return false;
 667       }
 668     }
 669   }
 670   return true;
 671 }
 672 
 673 bool java_lang_String::equals(oop str1, oop str2) {
 674   assert(str1->klass() == SystemDictionary::String_klass(),
 675          "must be java String");
 676   assert(str2->klass() == SystemDictionary::String_klass(),
 677          "must be java String");
 678   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 679   int          length1   = java_lang_String::length(str1);
 680   bool         is_latin1 = java_lang_String::is_latin1(str1);
 681   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 682   int          length2   = java_lang_String::length(str2);
 683   bool         is_latin2 = java_lang_String::is_latin1(str2);
 684 
 685   if ((length1 != length2) || (is_latin1 != is_latin2)) {
 686     // Strings of different size or with different
 687     // coders are never equal.
 688     return false;
 689   }
 690   int blength1 = value1->length();
 691   for (int i = 0; i < blength1; i++) {
 692     if (value1->byte_at(i) != value2->byte_at(i)) {
 693       return false;
 694     }
 695   }
 696   return true;
 697 }
 698 
 699 void java_lang_String::print(oop java_string, outputStream* st) {
 700   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 701   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 702 
 703   if (value == NULL) {
 704     // This can happen if, e.g., printing a String
 705     // object before its initializer has been called
 706     st->print("NULL");
 707     return;
 708   }
 709 
 710   int length = java_lang_String::length(java_string);
 711   bool is_latin1 = java_lang_String::is_latin1(java_string);
 712 
 713   st->print("\"");
 714   for (int index = 0; index < length; index++) {
 715     st->print("%c", (!is_latin1) ?  value->char_at(index) :
 716                            ((jchar) value->byte_at(index)) & 0xff );
 717   }
 718   st->print("\"");
 719 }
 720 
 721 
 722 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 723   assert(mirror.not_null() && fd->is_static(), "just checking");
 724   if (fd->has_initial_value()) {
 725     BasicType t = fd->field_type();
 726     switch (t) {
 727       case T_BYTE:
 728         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 729               break;
 730       case T_BOOLEAN:
 731         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 732               break;
 733       case T_CHAR:
 734         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 735               break;
 736       case T_SHORT:
 737         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 738               break;
 739       case T_INT:
 740         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 741         break;
 742       case T_FLOAT:
 743         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 744         break;
 745       case T_DOUBLE:
 746         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 747         break;
 748       case T_LONG:
 749         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 750         break;
 751       case T_OBJECT:
 752         {
 753           assert(fd->signature() == vmSymbols::string_signature(),
 754                  "just checking");
 755           if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
 756             // Archive the String field and update the pointer.
 757             oop s = mirror()->obj_field(fd->offset());
 758             oop archived_s = StringTable::create_archived_string(s, CHECK);
 759             mirror()->obj_field_put(fd->offset(), archived_s);
 760           } else {
 761             oop string = fd->string_initial_value(CHECK);
 762             mirror()->obj_field_put(fd->offset(), string);
 763           }
 764         }
 765         break;
 766       default:
 767         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 768                   "Illegal ConstantValue attribute in class file");
 769     }
 770   }
 771 }
 772 
 773 
 774 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 775   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 776 
 777   // If the offset was read from the shared archive, it was fixed up already
 778   if (!k->is_shared()) {
 779     if (k->is_instance_klass()) {
 780       // During bootstrap, java.lang.Class wasn't loaded so static field
 781       // offsets were computed without the size added it.  Go back and
 782       // update all the static field offsets to included the size.
 783       for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
 784         if (fs.access_flags().is_static()) {
 785           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 786           fs.set_offset(real_offset);
 787         }
 788       }
 789     }
 790   }
 791 
 792   if (k->is_shared() && k->has_raw_archived_mirror()) {
 793     if (HeapShared::open_archive_heap_region_mapped()) {
 794       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 795       assert(present, "Missing archived mirror for %s", k->external_name());
 796       return;
 797     } else {
 798       k->set_java_mirror_handle(NULL);
 799       k->clear_has_raw_archived_mirror();
 800     }
 801   }
 802   create_mirror(k, Handle(), Handle(), Handle(), CHECK);
 803 }
 804 
 805 void java_lang_Class::initialize_mirror_fields(Klass* k,
 806                                                Handle mirror,
 807                                                Handle protection_domain,
 808                                                TRAPS) {
 809   // Allocate a simple java object for a lock.
 810   // This needs to be a java object because during class initialization
 811   // it can be held across a java call.
 812   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 813   set_init_lock(mirror(), r);
 814 
 815   // Set protection domain also
 816   set_protection_domain(mirror(), protection_domain());
 817 
 818   // Initialize static fields
 819   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 820 }
 821 
 822 // Set the java.lang.Module module field in the java_lang_Class mirror
 823 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
 824   if (module.is_null()) {
 825     // During startup, the module may be NULL only if java.base has not been defined yet.
 826     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 827     // for java.base is known.
 828     assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
 829 
 830     bool javabase_was_defined = false;
 831     {
 832       MutexLocker m1(Module_lock, THREAD);
 833       // Keep list of classes needing java.base module fixup
 834       if (!ModuleEntryTable::javabase_defined()) {
 835         assert(k->java_mirror() != NULL, "Class's mirror is null");
 836         k->class_loader_data()->inc_keep_alive();
 837         assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
 838         fixup_module_field_list()->push(k);
 839       } else {
 840         javabase_was_defined = true;
 841       }
 842     }
 843 
 844     // If java.base was already defined then patch this particular class with java.base.
 845     if (javabase_was_defined) {
 846       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 847       assert(javabase_entry != NULL && javabase_entry->module() != NULL,
 848              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 849       Handle javabase_handle(THREAD, javabase_entry->module());
 850       set_module(mirror(), javabase_handle());
 851     }
 852   } else {
 853     assert(Universe::is_module_initialized() ||
 854            (ModuleEntryTable::javabase_defined() &&
 855             (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
 856            "Incorrect java.lang.Module specification while creating mirror");
 857     set_module(mirror(), module());
 858   }
 859 }
 860 
 861 // Statically allocate fixup lists because they always get created.
 862 void java_lang_Class::allocate_fixup_lists() {
 863   GrowableArray<Klass*>* mirror_list =
 864     new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 865   set_fixup_mirror_list(mirror_list);
 866 
 867   GrowableArray<Klass*>* module_list =
 868     new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
 869   set_fixup_module_field_list(module_list);
 870 }
 871 
 872 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
 873                                     Handle module, Handle protection_domain, TRAPS) {
 874   assert(k != NULL, "Use create_basic_type_mirror for primitive types");
 875   assert(k->java_mirror() == NULL, "should only assign mirror once");
 876 
 877   // Use this moment of initialization to cache modifier_flags also,
 878   // to support Class.getModifiers().  Instance classes recalculate
 879   // the cached flags after the class file is parsed, but before the
 880   // class is put into the system dictionary.
 881   int computed_modifiers = k->compute_modifier_flags(CHECK);
 882   k->set_modifier_flags(computed_modifiers);
 883   // Class_klass has to be loaded because it is used to allocate
 884   // the mirror.
 885   if (SystemDictionary::Class_klass_loaded()) {
 886     // Allocate mirror (java.lang.Class instance)
 887     oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 888     Handle mirror(THREAD, mirror_oop);
 889     Handle comp_mirror;
 890 
 891     // Setup indirection from mirror->klass
 892     java_lang_Class::set_klass(mirror(), k);
 893 
 894     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 895     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 896 
 897     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 898 
 899     // It might also have a component mirror.  This mirror must already exist.
 900     if (k->is_array_klass()) {
 901       if (k->is_typeArray_klass()) {
 902         BasicType type = TypeArrayKlass::cast(k)->element_type();
 903         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
 904       } else {
 905         assert(k->is_objArray_klass(), "Must be");
 906         Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
 907         assert(element_klass != NULL, "Must have an element klass");
 908         comp_mirror = Handle(THREAD, element_klass->java_mirror());
 909       }
 910       assert(comp_mirror() != NULL, "must have a mirror");
 911 
 912       // Two-way link between the array klass and its component mirror:
 913       // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
 914       set_component_mirror(mirror(), comp_mirror());
 915       // See below for ordering dependencies between field array_klass in component mirror
 916       // and java_mirror in this klass.
 917     } else {
 918       assert(k->is_instance_klass(), "Must be");
 919 
 920       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 921       if (HAS_PENDING_EXCEPTION) {
 922         // If any of the fields throws an exception like OOM remove the klass field
 923         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 924         // This mirror looks like a primitive type, which logically it is because it
 925         // it represents no class.
 926         java_lang_Class::set_klass(mirror(), NULL);
 927         return;
 928       }
 929     }
 930 
 931     // set the classLoader field in the java_lang_Class instance
 932     assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
 933     set_class_loader(mirror(), class_loader());
 934 
 935     // Setup indirection from klass->mirror
 936     // after any exceptions can happen during allocations.
 937     k->set_java_mirror(mirror);
 938 
 939     // Set the module field in the java_lang_Class instance.  This must be done
 940     // after the mirror is set.
 941     set_mirror_module_field(k, mirror, module, THREAD);
 942 
 943     if (comp_mirror() != NULL) {
 944       // Set after k->java_mirror() is published, because compiled code running
 945       // concurrently doesn't expect a k to have a null java_mirror.
 946       release_set_array_klass(comp_mirror(), k);
 947     }
 948   } else {
 949     assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
 950     fixup_mirror_list()->push(k);
 951   }
 952 }
 953 
 954 #if INCLUDE_CDS_JAVA_HEAP
 955 // Clears mirror fields. Static final fields with initial values are reloaded
 956 // from constant pool. The object identity hash is in the object header and is
 957 // not affected.
 958 class ResetMirrorField: public FieldClosure {
 959  private:
 960   Handle _m;
 961 
 962  public:
 963   ResetMirrorField(Handle mirror) : _m(mirror) {}
 964 
 965   void do_field(fieldDescriptor* fd) {
 966     assert(DumpSharedSpaces, "dump time only");
 967     assert(_m.not_null(), "Mirror cannot be NULL");
 968 
 969     if (fd->is_static() && fd->has_initial_value()) {
 970       initialize_static_field(fd, _m, Thread::current());
 971       return;
 972     }
 973 
 974     BasicType ft = fd->field_type();
 975     switch (ft) {
 976       case T_BYTE:
 977         _m()->byte_field_put(fd->offset(), 0);
 978         break;
 979       case T_CHAR:
 980         _m()->char_field_put(fd->offset(), 0);
 981         break;
 982       case T_DOUBLE:
 983         _m()->double_field_put(fd->offset(), 0);
 984         break;
 985       case T_FLOAT:
 986         _m()->float_field_put(fd->offset(), 0);
 987         break;
 988       case T_INT:
 989         _m()->int_field_put(fd->offset(), 0);
 990         break;
 991       case T_LONG:
 992         _m()->long_field_put(fd->offset(), 0);
 993         break;
 994       case T_SHORT:
 995         _m()->short_field_put(fd->offset(), 0);
 996         break;
 997       case T_BOOLEAN:
 998         _m()->bool_field_put(fd->offset(), false);
 999         break;
1000       case T_ARRAY:
1001       case T_OBJECT: {
1002         // It might be useful to cache the String field, but
1003         // for now just clear out any reference field
1004         oop o = _m()->obj_field(fd->offset());
1005         _m()->obj_field_put(fd->offset(), NULL);
1006         break;
1007       }
1008       default:
1009         ShouldNotReachHere();
1010         break;
1011      }
1012   }
1013 };
1014 
1015 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1016   assert(HeapShared::is_heap_object_archiving_allowed(),
1017          "HeapShared::is_heap_object_archiving_allowed() must be true");
1018 
1019   for (int t = 0; t <= T_VOID; t++) {
1020     oop m = Universe::_mirrors[t];
1021     if (m != NULL) {
1022       // Update the field at _array_klass_offset to point to the relocated array klass.
1023       oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1024       assert(archived_m != NULL, "sanity");
1025       Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1026       assert(ak != NULL || t == T_VOID, "should not be NULL");
1027       if (ak != NULL) {
1028         Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1029         archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1030       }
1031 
1032       // Clear the fields. Just to be safe
1033       Klass *k = m->klass();
1034       Handle archived_mirror_h(THREAD, archived_m);
1035       ResetMirrorField reset(archived_mirror_h);
1036       InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1037 
1038       log_trace(cds, heap, mirror)(
1039         "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1040         type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1041 
1042       Universe::_mirrors[t] = archived_m;
1043     }
1044   }
1045 
1046   assert(Universe::_mirrors[T_INT] != NULL &&
1047          Universe::_mirrors[T_FLOAT] != NULL &&
1048          Universe::_mirrors[T_DOUBLE] != NULL &&
1049          Universe::_mirrors[T_BYTE] != NULL &&
1050          Universe::_mirrors[T_BOOLEAN] != NULL &&
1051          Universe::_mirrors[T_CHAR] != NULL &&
1052          Universe::_mirrors[T_LONG] != NULL &&
1053          Universe::_mirrors[T_SHORT] != NULL &&
1054          Universe::_mirrors[T_VOID] != NULL, "sanity");
1055 
1056   Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1057   Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1058   Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1059   Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1060   Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1061   Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1062   Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1063   Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1064   Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1065 }
1066 
1067 //
1068 // After the mirror object is successfully archived, the archived
1069 // klass is set with _has_archived_raw_mirror flag.
1070 //
1071 // The _has_archived_raw_mirror flag is cleared at runtime when the
1072 // archived mirror is restored. If archived java heap data cannot
1073 // be used at runtime, new mirror object is created for the shared
1074 // class. The _has_archived_raw_mirror is cleared also during the process.
1075 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1076   assert(HeapShared::is_heap_object_archiving_allowed(),
1077          "HeapShared::is_heap_object_archiving_allowed() must be true");
1078 
1079   // Mirror is already archived
1080   if (k->has_raw_archived_mirror()) {
1081     assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1082     return k->archived_java_mirror_raw();
1083   }
1084 
1085   // No mirror
1086   oop mirror = k->java_mirror();
1087   if (mirror == NULL) {
1088     return NULL;
1089   }
1090 
1091   if (k->is_instance_klass()) {
1092     InstanceKlass *ik = InstanceKlass::cast(k);
1093     assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1094            "class with signer cannot be supported");
1095 
1096     if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1097           ik->is_shared_app_class())) {
1098       // Archiving mirror for classes from non-builtin loaders is not
1099       // supported. Clear the _java_mirror within the archived class.
1100       k->set_java_mirror_handle(NULL);
1101       return NULL;
1102     }
1103   }
1104 
1105   // Now start archiving the mirror object
1106   oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1107   if (archived_mirror == NULL) {
1108     return NULL;
1109   }
1110 
1111   archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1112   if (archived_mirror == NULL) {
1113     return NULL;
1114   }
1115 
1116   k->set_archived_java_mirror_raw(archived_mirror);
1117 
1118   k->set_has_raw_archived_mirror();
1119 
1120   ResourceMark rm;
1121   log_trace(cds, heap, mirror)(
1122     "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1123     k->external_name(), p2i(mirror), p2i(archived_mirror));
1124 
1125   return archived_mirror;
1126 }
1127 
1128 // The process is based on create_mirror().
1129 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1130                                              oop archived_mirror,
1131                                              Thread *THREAD) {
1132   // Clear nonstatic fields in archived mirror. Some of the fields will be set
1133   // to archived metadata and objects below.
1134   Klass *c = archived_mirror->klass();
1135   Handle archived_mirror_h(THREAD, archived_mirror);
1136   ResetMirrorField reset(archived_mirror_h);
1137   InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1138 
1139   if (k->is_array_klass()) {
1140     oop archived_comp_mirror;
1141     if (k->is_typeArray_klass()) {
1142       // The primitive type mirrors are already archived. Get the archived mirror.
1143       oop comp_mirror = java_lang_Class::component_mirror(mirror);
1144       archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1145       assert(archived_comp_mirror != NULL, "Must be");
1146     } else {
1147       assert(k->is_objArray_klass(), "Must be");
1148       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1149       assert(element_klass != NULL, "Must have an element klass");
1150       archived_comp_mirror = archive_mirror(element_klass, THREAD);
1151       if (archived_comp_mirror == NULL) {
1152         return NULL;
1153       }
1154     }
1155     java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1156   } else {
1157     assert(k->is_instance_klass(), "Must be");
1158 
1159     // Reset local static fields in the mirror
1160     InstanceKlass::cast(k)->do_local_static_fields(&reset);
1161 
1162     java_lang_Class:set_init_lock(archived_mirror, NULL);
1163 
1164     set_protection_domain(archived_mirror, NULL);
1165   }
1166 
1167   // clear class loader and mirror_module_field
1168   set_class_loader(archived_mirror, NULL);
1169   set_module(archived_mirror, NULL);
1170 
1171   // The archived mirror's field at _klass_offset is still pointing to the original
1172   // klass. Updated the field in the archived mirror to point to the relocated
1173   // klass in the archive.
1174   Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1175   log_debug(cds, heap, mirror)(
1176     "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1177     p2i(as_Klass(mirror)), p2i(reloc_k));
1178   archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1179 
1180   // The field at _array_klass_offset is pointing to the original one dimension
1181   // higher array klass if exists. Relocate the pointer.
1182   Klass *arr = array_klass_acquire(mirror);
1183   if (arr != NULL) {
1184     Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1185     log_debug(cds, heap, mirror)(
1186       "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1187       p2i(arr), p2i(reloc_arr));
1188     archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1189   }
1190   return archived_mirror;
1191 }
1192 
1193 // Returns true if the mirror is updated, false if no archived mirror
1194 // data is present. After the archived mirror object is restored, the
1195 // shared klass' _has_raw_archived_mirror flag is cleared.
1196 bool java_lang_Class::restore_archived_mirror(Klass *k,
1197                                               Handle class_loader, Handle module,
1198                                               Handle protection_domain, TRAPS) {
1199   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1200   // see more details in SystemDictionary::resolve_well_known_classes().
1201   if (!SystemDictionary::Class_klass_loaded()) {
1202     assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1203     fixup_mirror_list()->push(k);
1204     return true;
1205   }
1206 
1207   oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1208 
1209   if (m == NULL) {
1210     return false;
1211   }
1212 
1213   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1214 
1215   // mirror is archived, restore
1216   assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1217   Handle mirror(THREAD, m);
1218 
1219   if (!k->is_array_klass()) {
1220     // - local static final fields with initial values were initialized at dump time
1221 
1222     // create the init_lock
1223     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1224     set_init_lock(mirror(), r);
1225 
1226     if (protection_domain.not_null()) {
1227       set_protection_domain(mirror(), protection_domain());
1228     }
1229   }
1230 
1231   assert(class_loader() == k->class_loader(), "should be same");
1232   if (class_loader.not_null()) {
1233     set_class_loader(mirror(), class_loader());
1234   }
1235 
1236   k->set_java_mirror(mirror);
1237   k->clear_has_raw_archived_mirror();
1238 
1239   set_mirror_module_field(k, mirror, module, THREAD);
1240 
1241   ResourceMark rm;
1242   log_trace(cds, heap, mirror)(
1243     "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1244 
1245   return true;
1246 }
1247 #endif // INCLUDE_CDS_JAVA_HEAP
1248 
1249 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1250   assert(_module_offset != 0, "must have been computed already");
1251   java_lang_Class::set_module(k->java_mirror(), module());
1252 }
1253 
1254 int  java_lang_Class::oop_size(oop java_class) {
1255   assert(_oop_size_offset != 0, "must be set");
1256   int size = java_class->int_field(_oop_size_offset);
1257   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1258   return size;
1259 }
1260 
1261 int  java_lang_Class::oop_size_raw(oop java_class) {
1262   assert(_oop_size_offset != 0, "must be set");
1263   int size = java_class->int_field_raw(_oop_size_offset);
1264   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1265   return size;
1266 }
1267 
1268 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1269   assert(_oop_size_offset != 0, "must be set");
1270   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1271   *(int*)(((char*)java_class) + _oop_size_offset) = size;
1272 }
1273 
1274 int  java_lang_Class::static_oop_field_count(oop java_class) {
1275   assert(_static_oop_field_count_offset != 0, "must be set");
1276   return java_class->int_field(_static_oop_field_count_offset);
1277 }
1278 
1279 int  java_lang_Class::static_oop_field_count_raw(oop java_class) {
1280   assert(_static_oop_field_count_offset != 0, "must be set");
1281   return java_class->int_field_raw(_static_oop_field_count_offset);
1282 }
1283 
1284 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1285   assert(_static_oop_field_count_offset != 0, "must be set");
1286   java_class->int_field_put(_static_oop_field_count_offset, size);
1287 }
1288 
1289 oop java_lang_Class::protection_domain(oop java_class) {
1290   assert(_protection_domain_offset != 0, "must be set");
1291   return java_class->obj_field(_protection_domain_offset);
1292 }
1293 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1294   assert(_protection_domain_offset != 0, "must be set");
1295   java_class->obj_field_put(_protection_domain_offset, pd);
1296 }
1297 
1298 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1299   assert(_component_mirror_offset != 0, "must be set");
1300     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1301   }
1302 oop java_lang_Class::component_mirror(oop java_class) {
1303   assert(_component_mirror_offset != 0, "must be set");
1304   return java_class->obj_field(_component_mirror_offset);
1305 }
1306 
1307 oop java_lang_Class::init_lock(oop java_class) {
1308   assert(_init_lock_offset != 0, "must be set");
1309   return java_class->obj_field(_init_lock_offset);
1310 }
1311 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1312   assert(_init_lock_offset != 0, "must be set");
1313   java_class->obj_field_put(_init_lock_offset, init_lock);
1314 }
1315 
1316 objArrayOop java_lang_Class::signers(oop java_class) {
1317   assert(_signers_offset != 0, "must be set");
1318   return (objArrayOop)java_class->obj_field(_signers_offset);
1319 }
1320 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1321   assert(_signers_offset != 0, "must be set");
1322   java_class->obj_field_put(_signers_offset, (oop)signers);
1323 }
1324 
1325 
1326 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1327   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1328   if (_class_loader_offset != 0) {
1329     java_class->obj_field_put(_class_loader_offset, loader);
1330   }
1331 }
1332 
1333 oop java_lang_Class::class_loader(oop java_class) {
1334   assert(_class_loader_offset != 0, "must be set");
1335   return java_class->obj_field(_class_loader_offset);
1336 }
1337 
1338 oop java_lang_Class::module(oop java_class) {
1339   assert(_module_offset != 0, "must be set");
1340   return java_class->obj_field(_module_offset);
1341 }
1342 
1343 void java_lang_Class::set_module(oop java_class, oop module) {
1344   assert(_module_offset != 0, "must be set");
1345   java_class->obj_field_put(_module_offset, module);
1346 }
1347 
1348 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1349   // This should be improved by adding a field at the Java level or by
1350   // introducing a new VM klass (see comment in ClassFileParser)
1351   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1352   if (type != T_VOID) {
1353     Klass* aklass = Universe::typeArrayKlassObj(type);
1354     assert(aklass != NULL, "correct bootstrap");
1355     release_set_array_klass(java_class, aklass);
1356   }
1357 #ifdef ASSERT
1358   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1359   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1360 #endif
1361   return java_class;
1362 }
1363 
1364 
1365 Klass* java_lang_Class::as_Klass(oop java_class) {
1366   //%note memory_2
1367   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1368   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1369   assert(k == NULL || k->is_klass(), "type check");
1370   return k;
1371 }
1372 
1373 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1374   //%note memory_2
1375   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1376   Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1377   assert(k == NULL || k->is_klass(), "type check");
1378   return k;
1379 }
1380 
1381 
1382 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1383   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1384   java_class->metadata_field_put(_klass_offset, klass);
1385 }
1386 
1387 
1388 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1389   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1390   Symbol* name = NULL;
1391   bool is_instance = false;
1392   if (is_primitive(java_class)) {
1393     name = vmSymbols::type_signature(primitive_type(java_class));
1394   } else {
1395     Klass* k = as_Klass(java_class);
1396     is_instance = k->is_instance_klass();
1397     name = k->name();
1398   }
1399   if (name == NULL) {
1400     st->print("<null>");
1401     return;
1402   }
1403   if (is_instance)  st->print("L");
1404   st->write((char*) name->base(), (int) name->utf8_length());
1405   if (is_instance)  st->print(";");
1406 }
1407 
1408 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1409   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1410   Symbol* name;
1411   if (is_primitive(java_class)) {
1412     name = vmSymbols::type_signature(primitive_type(java_class));
1413     // Because this can create a new symbol, the caller has to decrement
1414     // the refcount, so make adjustment here and below for symbols returned
1415     // that are not created or incremented due to a successful lookup.
1416     name->increment_refcount();
1417   } else {
1418     Klass* k = as_Klass(java_class);
1419     if (!k->is_instance_klass()) {
1420       name = k->name();
1421       name->increment_refcount();
1422     } else {
1423       ResourceMark rm;
1424       const char* sigstr = k->signature_name();
1425       int         siglen = (int) strlen(sigstr);
1426       if (!intern_if_not_found) {
1427         name = SymbolTable::probe(sigstr, siglen);
1428       } else {
1429         name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1430       }
1431     }
1432   }
1433   return name;
1434 }
1435 
1436 // Returns the Java name for this Java mirror (Resource allocated)
1437 // See Klass::external_name().
1438 // For primitive type Java mirrors, its type name is returned.
1439 const char* java_lang_Class::as_external_name(oop java_class) {
1440   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1441   const char* name = NULL;
1442   if (is_primitive(java_class)) {
1443     name = type2name(primitive_type(java_class));
1444   } else {
1445     name = as_Klass(java_class)->external_name();
1446   }
1447   if (name == NULL) {
1448     name = "<null>";
1449   }
1450   return name;
1451 }
1452 
1453 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1454   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1455   assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1456   return k;
1457 }
1458 
1459 
1460 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1461   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1462   java_class->release_metadata_field_put(_array_klass_offset, klass);
1463 }
1464 
1465 
1466 bool java_lang_Class::is_primitive(oop java_class) {
1467   // should assert:
1468   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1469   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1470 
1471 #ifdef ASSERT
1472   if (is_primitive) {
1473     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1474     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1475         "Should be either the T_VOID primitive or a java primitive");
1476   }
1477 #endif
1478 
1479   return is_primitive;
1480 }
1481 
1482 
1483 BasicType java_lang_Class::primitive_type(oop java_class) {
1484   assert(java_lang_Class::is_primitive(java_class), "just checking");
1485   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1486   BasicType type = T_VOID;
1487   if (ak != NULL) {
1488     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1489     type = ArrayKlass::cast(ak)->element_type();
1490   } else {
1491     assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1492   }
1493   assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1494   return type;
1495 }
1496 
1497 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1498   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1499   if (is_primitive(java_class)) {
1500     if (reference_klass != NULL)
1501       (*reference_klass) = NULL;
1502     return primitive_type(java_class);
1503   } else {
1504     if (reference_klass != NULL)
1505       (*reference_klass) = as_Klass(java_class);
1506     return T_OBJECT;
1507   }
1508 }
1509 
1510 
1511 oop java_lang_Class::primitive_mirror(BasicType t) {
1512   oop mirror = Universe::java_mirror(t);
1513   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1514   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1515   return mirror;
1516 }
1517 
1518 bool java_lang_Class::offsets_computed = false;
1519 int  java_lang_Class::classRedefinedCount_offset = -1;
1520 
1521 #define CLASS_FIELDS_DO(macro) \
1522   macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false) ; \
1523   macro(_class_loader_offset,       k, "classLoader",         classloader_signature, false); \
1524   macro(_component_mirror_offset,   k, "componentType",       class_signature,       false); \
1525   macro(_module_offset,             k, "module",              module_signature,      false)
1526 
1527 void java_lang_Class::compute_offsets() {
1528   if (offsets_computed) {
1529     return;
1530   }
1531 
1532   offsets_computed = true;
1533 
1534   InstanceKlass* k = SystemDictionary::Class_klass();
1535   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1536 
1537   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
1538   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
1539   // GC treats them the same.
1540   _init_lock_offset = _component_mirror_offset;
1541 
1542   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1543 }
1544 
1545 #if INCLUDE_CDS
1546 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1547   f->do_u4((u4*)&offsets_computed);
1548   f->do_u4((u4*)&_init_lock_offset);
1549 
1550   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1551 
1552   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1553 }
1554 #endif
1555 
1556 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1557   if (classRedefinedCount_offset == -1) {
1558     // If we don't have an offset for it then just return -1 as a marker.
1559     return -1;
1560   }
1561 
1562   return the_class_mirror->int_field(classRedefinedCount_offset);
1563 }
1564 
1565 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1566   if (classRedefinedCount_offset == -1) {
1567     // If we don't have an offset for it then nothing to set.
1568     return;
1569   }
1570 
1571   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1572 }
1573 
1574 
1575 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1576 //       platform thread structure, and a eetop offset which was used for thread
1577 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1578 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1579 //       instead of the privateInfo_offset.
1580 //
1581 // Note: The stackSize field is only present starting in 1.4.
1582 
1583 int java_lang_Thread::_name_offset = 0;
1584 int java_lang_Thread::_group_offset = 0;
1585 int java_lang_Thread::_contextClassLoader_offset = 0;
1586 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1587 int java_lang_Thread::_priority_offset = 0;
1588 int java_lang_Thread::_eetop_offset = 0;
1589 int java_lang_Thread::_daemon_offset = 0;
1590 int java_lang_Thread::_stillborn_offset = 0;
1591 int java_lang_Thread::_stackSize_offset = 0;
1592 int java_lang_Thread::_tid_offset = 0;
1593 int java_lang_Thread::_thread_status_offset = 0;
1594 int java_lang_Thread::_park_blocker_offset = 0;
1595 int java_lang_Thread::_park_event_offset = 0 ;
1596 
1597 #define THREAD_FIELDS_DO(macro) \
1598   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1599   macro(_group_offset,         k, vmSymbols::group_name(), threadgroup_signature, false); \
1600   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1601   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1602   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature, false); \
1603   macro(_daemon_offset,        k, vmSymbols::daemon_name(), bool_signature, false); \
1604   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1605   macro(_stillborn_offset,     k, "stillborn", bool_signature, false); \
1606   macro(_stackSize_offset,     k, "stackSize", long_signature, false); \
1607   macro(_tid_offset,           k, "tid", long_signature, false); \
1608   macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1609   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1610   macro(_park_event_offset,    k, "nativeParkEventPointer", long_signature, false)
1611 
1612 void java_lang_Thread::compute_offsets() {
1613   assert(_group_offset == 0, "offsets should be initialized only once");
1614 
1615   InstanceKlass* k = SystemDictionary::Thread_klass();
1616   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1617 }
1618 
1619 #if INCLUDE_CDS
1620 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1621   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1622 }
1623 #endif
1624 
1625 JavaThread* java_lang_Thread::thread(oop java_thread) {
1626   return (JavaThread*)java_thread->address_field(_eetop_offset);
1627 }
1628 
1629 
1630 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1631   java_thread->address_field_put(_eetop_offset, (address)thread);
1632 }
1633 
1634 
1635 oop java_lang_Thread::name(oop java_thread) {
1636   return java_thread->obj_field(_name_offset);
1637 }
1638 
1639 
1640 void java_lang_Thread::set_name(oop java_thread, oop name) {
1641   java_thread->obj_field_put(_name_offset, name);
1642 }
1643 
1644 
1645 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1646   return (ThreadPriority)java_thread->int_field(_priority_offset);
1647 }
1648 
1649 
1650 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1651   java_thread->int_field_put(_priority_offset, priority);
1652 }
1653 
1654 
1655 oop java_lang_Thread::threadGroup(oop java_thread) {
1656   return java_thread->obj_field(_group_offset);
1657 }
1658 
1659 
1660 bool java_lang_Thread::is_stillborn(oop java_thread) {
1661   return java_thread->bool_field(_stillborn_offset) != 0;
1662 }
1663 
1664 
1665 // We never have reason to turn the stillborn bit off
1666 void java_lang_Thread::set_stillborn(oop java_thread) {
1667   java_thread->bool_field_put(_stillborn_offset, true);
1668 }
1669 
1670 
1671 bool java_lang_Thread::is_alive(oop java_thread) {
1672   JavaThread* thr = java_lang_Thread::thread(java_thread);
1673   return (thr != NULL);
1674 }
1675 
1676 
1677 bool java_lang_Thread::is_daemon(oop java_thread) {
1678   return java_thread->bool_field(_daemon_offset) != 0;
1679 }
1680 
1681 
1682 void java_lang_Thread::set_daemon(oop java_thread) {
1683   java_thread->bool_field_put(_daemon_offset, true);
1684 }
1685 
1686 oop java_lang_Thread::context_class_loader(oop java_thread) {
1687   return java_thread->obj_field(_contextClassLoader_offset);
1688 }
1689 
1690 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1691   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1692 }
1693 
1694 
1695 jlong java_lang_Thread::stackSize(oop java_thread) {
1696   if (_stackSize_offset > 0) {
1697     return java_thread->long_field(_stackSize_offset);
1698   } else {
1699     return 0;
1700   }
1701 }
1702 
1703 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1704 void java_lang_Thread::set_thread_status(oop java_thread,
1705                                          java_lang_Thread::ThreadStatus status) {
1706   // The threadStatus is only present starting in 1.5
1707   if (_thread_status_offset > 0) {
1708     java_thread->int_field_put(_thread_status_offset, status);
1709   }
1710 }
1711 
1712 // Read thread status value from threadStatus field in java.lang.Thread java class.
1713 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1714   // Make sure the caller is operating on behalf of the VM or is
1715   // running VM code (state == _thread_in_vm).
1716   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1717          JavaThread::current()->thread_state() == _thread_in_vm,
1718          "Java Thread is not running in vm");
1719   // The threadStatus is only present starting in 1.5
1720   if (_thread_status_offset > 0) {
1721     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1722   } else {
1723     // All we can easily figure out is if it is alive, but that is
1724     // enough info for a valid unknown status.
1725     // These aren't restricted to valid set ThreadStatus values, so
1726     // use JVMTI values and cast.
1727     JavaThread* thr = java_lang_Thread::thread(java_thread);
1728     if (thr == NULL) {
1729       // the thread hasn't run yet or is in the process of exiting
1730       return NEW;
1731     }
1732     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1733   }
1734 }
1735 
1736 
1737 jlong java_lang_Thread::thread_id(oop java_thread) {
1738   // The thread ID field is only present starting in 1.5
1739   if (_tid_offset > 0) {
1740     return java_thread->long_field(_tid_offset);
1741   } else {
1742     return 0;
1743   }
1744 }
1745 
1746 oop java_lang_Thread::park_blocker(oop java_thread) {
1747   assert(JDK_Version::current().supports_thread_park_blocker() &&
1748          _park_blocker_offset != 0, "Must support parkBlocker field");
1749 
1750   if (_park_blocker_offset > 0) {
1751     return java_thread->obj_field(_park_blocker_offset);
1752   }
1753 
1754   return NULL;
1755 }
1756 
1757 jlong java_lang_Thread::park_event(oop java_thread) {
1758   if (_park_event_offset > 0) {
1759     return java_thread->long_field(_park_event_offset);
1760   }
1761   return 0;
1762 }
1763 
1764 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1765   if (_park_event_offset > 0) {
1766     java_thread->long_field_put(_park_event_offset, ptr);
1767     return true;
1768   }
1769   return false;
1770 }
1771 
1772 
1773 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1774   assert(_thread_status_offset != 0, "Must have thread status");
1775   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1776   switch (status) {
1777     case NEW                      : return "NEW";
1778     case RUNNABLE                 : return "RUNNABLE";
1779     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1780     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1781     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1782     case PARKED                   : return "WAITING (parking)";
1783     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1784     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1785     case TERMINATED               : return "TERMINATED";
1786     default                       : return "UNKNOWN";
1787   };
1788 }
1789 int java_lang_ThreadGroup::_parent_offset = 0;
1790 int java_lang_ThreadGroup::_name_offset = 0;
1791 int java_lang_ThreadGroup::_threads_offset = 0;
1792 int java_lang_ThreadGroup::_groups_offset = 0;
1793 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1794 int java_lang_ThreadGroup::_destroyed_offset = 0;
1795 int java_lang_ThreadGroup::_daemon_offset = 0;
1796 int java_lang_ThreadGroup::_nthreads_offset = 0;
1797 int java_lang_ThreadGroup::_ngroups_offset = 0;
1798 
1799 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1800   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1801   return java_thread_group->obj_field(_parent_offset);
1802 }
1803 
1804 // ("name as oop" accessor is not necessary)
1805 
1806 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1807   oop name = java_thread_group->obj_field(_name_offset);
1808   // ThreadGroup.name can be null
1809   if (name != NULL) {
1810     return java_lang_String::as_utf8_string(name);
1811   }
1812   return NULL;
1813 }
1814 
1815 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1816   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1817   return java_thread_group->int_field(_nthreads_offset);
1818 }
1819 
1820 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1821   oop threads = java_thread_group->obj_field(_threads_offset);
1822   assert(threads != NULL, "threadgroups should have threads");
1823   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1824   return objArrayOop(threads);
1825 }
1826 
1827 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1828   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1829   return java_thread_group->int_field(_ngroups_offset);
1830 }
1831 
1832 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1833   oop groups = java_thread_group->obj_field(_groups_offset);
1834   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1835   return objArrayOop(groups);
1836 }
1837 
1838 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1839   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1840   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1841 }
1842 
1843 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1844   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1845   return java_thread_group->bool_field(_destroyed_offset) != 0;
1846 }
1847 
1848 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1849   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1850   return java_thread_group->bool_field(_daemon_offset) != 0;
1851 }
1852 
1853 #define THREADGROUP_FIELDS_DO(macro) \
1854   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,       false); \
1855   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,            false); \
1856   macro(_threads_offset,     k, vmSymbols::threads_name(),     thread_array_signature,      false); \
1857   macro(_groups_offset,      k, vmSymbols::groups_name(),      threadgroup_array_signature, false); \
1858   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,               false); \
1859   macro(_destroyed_offset,   k, vmSymbols::destroyed_name(),   bool_signature,              false); \
1860   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,              false); \
1861   macro(_nthreads_offset,    k, vmSymbols::nthreads_name(),    int_signature,               false); \
1862   macro(_ngroups_offset,     k, vmSymbols::ngroups_name(),     int_signature,               false)
1863 
1864 void java_lang_ThreadGroup::compute_offsets() {
1865   assert(_parent_offset == 0, "offsets should be initialized only once");
1866 
1867   InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1868   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1869 }
1870 
1871 #if INCLUDE_CDS
1872 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1873   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1874 }
1875 #endif
1876 
1877 #define THROWABLE_FIELDS_DO(macro) \
1878   macro(backtrace_offset,     k, "backtrace",     object_signature,                  false); \
1879   macro(detailMessage_offset, k, "detailMessage", string_signature,                  false); \
1880   macro(stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
1881   macro(depth_offset,         k, "depth",         int_signature,                     false); \
1882   macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1883 
1884 void java_lang_Throwable::compute_offsets() {
1885   InstanceKlass* k = SystemDictionary::Throwable_klass();
1886   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1887 }
1888 
1889 #if INCLUDE_CDS
1890 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1891   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1892 }
1893 #endif
1894 
1895 oop java_lang_Throwable::unassigned_stacktrace() {
1896   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1897   oop base = ik->static_field_base_raw();
1898   return base->obj_field(static_unassigned_stacktrace_offset);
1899 }
1900 
1901 oop java_lang_Throwable::backtrace(oop throwable) {
1902   return throwable->obj_field_acquire(backtrace_offset);
1903 }
1904 
1905 
1906 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1907   throwable->release_obj_field_put(backtrace_offset, value);
1908 }
1909 
1910 int java_lang_Throwable::depth(oop throwable) {
1911   return throwable->int_field(depth_offset);
1912 }
1913 
1914 void java_lang_Throwable::set_depth(oop throwable, int value) {
1915   throwable->int_field_put(depth_offset, value);
1916 }
1917 
1918 oop java_lang_Throwable::message(oop throwable) {
1919   return throwable->obj_field(detailMessage_offset);
1920 }
1921 
1922 
1923 // Return Symbol for detailed_message or NULL
1924 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1925   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1926   oop detailed_message = java_lang_Throwable::message(throwable);
1927   if (detailed_message != NULL) {
1928     return java_lang_String::as_symbol(detailed_message, THREAD);
1929   }
1930   return NULL;
1931 }
1932 
1933 void java_lang_Throwable::set_message(oop throwable, oop value) {
1934   throwable->obj_field_put(detailMessage_offset, value);
1935 }
1936 
1937 
1938 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1939   throwable->obj_field_put(stackTrace_offset, st_element_array);
1940 }
1941 
1942 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1943   set_stacktrace(throwable, NULL);
1944 }
1945 
1946 
1947 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1948   ResourceMark rm;
1949   Klass* k = throwable->klass();
1950   assert(k != NULL, "just checking");
1951   st->print("%s", k->external_name());
1952   oop msg = message(throwable);
1953   if (msg != NULL) {
1954     st->print(": %s", java_lang_String::as_utf8_string(msg));
1955   }
1956 }
1957 
1958 // After this many redefines, the stack trace is unreliable.
1959 const int MAX_VERSION = USHRT_MAX;
1960 
1961 static inline bool version_matches(Method* method, int version) {
1962   assert(version < MAX_VERSION, "version is too big");
1963   return method != NULL && (method->constants()->version() == version);
1964 }
1965 
1966 
1967 // This class provides a simple wrapper over the internal structure of
1968 // exception backtrace to insulate users of the backtrace from needing
1969 // to know what it looks like.
1970 class BacktraceBuilder: public StackObj {
1971  friend class BacktraceIterator;
1972  private:
1973   Handle          _backtrace;
1974   objArrayOop     _head;
1975   typeArrayOop    _methods;
1976   typeArrayOop    _bcis;
1977   objArrayOop     _mirrors;
1978   typeArrayOop    _names; // needed to insulate method name against redefinition
1979   int             _index;
1980   NoSafepointVerifier _nsv;
1981 
1982   enum {
1983     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1984     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1985     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1986     trace_names_offset   = java_lang_Throwable::trace_names_offset,
1987     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1988     trace_size           = java_lang_Throwable::trace_size,
1989     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1990   };
1991 
1992   // get info out of chunks
1993   static typeArrayOop get_methods(objArrayHandle chunk) {
1994     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1995     assert(methods != NULL, "method array should be initialized in backtrace");
1996     return methods;
1997   }
1998   static typeArrayOop get_bcis(objArrayHandle chunk) {
1999     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2000     assert(bcis != NULL, "bci array should be initialized in backtrace");
2001     return bcis;
2002   }
2003   static objArrayOop get_mirrors(objArrayHandle chunk) {
2004     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2005     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2006     return mirrors;
2007   }
2008   static typeArrayOop get_names(objArrayHandle chunk) {
2009     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2010     assert(names != NULL, "names array should be initialized in backtrace");
2011     return names;
2012   }
2013 
2014  public:
2015 
2016   // constructor for new backtrace
2017   BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2018     expand(CHECK);
2019     _backtrace = Handle(THREAD, _head);
2020     _index = 0;
2021   }
2022 
2023   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2024     _methods = get_methods(backtrace);
2025     _bcis = get_bcis(backtrace);
2026     _mirrors = get_mirrors(backtrace);
2027     _names = get_names(backtrace);
2028     assert(_methods->length() == _bcis->length() &&
2029            _methods->length() == _mirrors->length() &&
2030            _mirrors->length() == _names->length(),
2031            "method and source information arrays should match");
2032 
2033     // head is the preallocated backtrace
2034     _head = backtrace();
2035     _backtrace = Handle(thread, _head);
2036     _index = 0;
2037   }
2038 
2039   void expand(TRAPS) {
2040     objArrayHandle old_head(THREAD, _head);
2041     PauseNoSafepointVerifier pnsv(&_nsv);
2042 
2043     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2044     objArrayHandle new_head(THREAD, head);
2045 
2046     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2047     typeArrayHandle new_methods(THREAD, methods);
2048 
2049     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2050     typeArrayHandle new_bcis(THREAD, bcis);
2051 
2052     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2053     objArrayHandle new_mirrors(THREAD, mirrors);
2054 
2055     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2056     typeArrayHandle new_names(THREAD, names);
2057 
2058     if (!old_head.is_null()) {
2059       old_head->obj_at_put(trace_next_offset, new_head());
2060     }
2061     new_head->obj_at_put(trace_methods_offset, new_methods());
2062     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2063     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2064     new_head->obj_at_put(trace_names_offset, new_names());
2065 
2066     _head    = new_head();
2067     _methods = new_methods();
2068     _bcis = new_bcis();
2069     _mirrors = new_mirrors();
2070     _names  = new_names();
2071     _index = 0;
2072   }
2073 
2074   oop backtrace() {
2075     return _backtrace();
2076   }
2077 
2078   inline void push(Method* method, int bci, TRAPS) {
2079     // Smear the -1 bci to 0 since the array only holds unsigned
2080     // shorts.  The later line number lookup would just smear the -1
2081     // to a 0 even if it could be recorded.
2082     if (bci == SynchronizationEntryBCI) bci = 0;
2083 
2084     if (_index >= trace_chunk_size) {
2085       methodHandle mhandle(THREAD, method);
2086       expand(CHECK);
2087       method = mhandle();
2088     }
2089 
2090     _methods->ushort_at_put(_index, method->orig_method_idnum());
2091     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2092 
2093     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2094     // klass owning the symbols alive so their refcounts aren't decremented.
2095     Symbol* name = method->name();
2096     _names->symbol_at_put(_index, name);
2097 
2098     // We need to save the mirrors in the backtrace to keep the class
2099     // from being unloaded while we still have this stack trace.
2100     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2101     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2102     _index++;
2103   }
2104 
2105 };
2106 
2107 struct BacktraceElement : public StackObj {
2108   int _method_id;
2109   int _bci;
2110   int _version;
2111   Symbol* _name;
2112   Handle _mirror;
2113   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2114                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2115 };
2116 
2117 class BacktraceIterator : public StackObj {
2118   int _index;
2119   objArrayHandle  _result;
2120   objArrayHandle  _mirrors;
2121   typeArrayHandle _methods;
2122   typeArrayHandle _bcis;
2123   typeArrayHandle _names;
2124 
2125   void init(objArrayHandle result, Thread* thread) {
2126     // Get method id, bci, version and mirror from chunk
2127     _result = result;
2128     if (_result.not_null()) {
2129       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2130       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2131       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2132       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2133       _index = 0;
2134     }
2135   }
2136  public:
2137   BacktraceIterator(objArrayHandle result, Thread* thread) {
2138     init(result, thread);
2139     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2140   }
2141 
2142   BacktraceElement next(Thread* thread) {
2143     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2144                         _methods->ushort_at(_index),
2145                         Backtrace::version_at(_bcis->int_at(_index)),
2146                         Backtrace::bci_at(_bcis->int_at(_index)),
2147                         _names->symbol_at(_index));
2148     _index++;
2149 
2150     if (_index >= java_lang_Throwable::trace_chunk_size) {
2151       int next_offset = java_lang_Throwable::trace_next_offset;
2152       // Get next chunk
2153       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2154       init(result, thread);
2155     }
2156     return e;
2157   }
2158 
2159   bool repeat() {
2160     return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2161   }
2162 };
2163 
2164 
2165 // Print stack trace element to resource allocated buffer
2166 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2167                                           int version, int bci, Symbol* name) {
2168   ResourceMark rm;
2169 
2170   // Get strings and string lengths
2171   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2172   const char* klass_name  = holder->external_name();
2173   int buf_len = (int)strlen(klass_name);
2174 
2175   char* method_name = name->as_C_string();
2176   buf_len += (int)strlen(method_name);
2177 
2178   char* source_file_name = NULL;
2179   Symbol* source = Backtrace::get_source_file_name(holder, version);
2180   if (source != NULL) {
2181     source_file_name = source->as_C_string();
2182     buf_len += (int)strlen(source_file_name);
2183   }
2184 
2185   char *module_name = NULL, *module_version = NULL;
2186   ModuleEntry* module = holder->module();
2187   if (module->is_named()) {
2188     module_name = module->name()->as_C_string();
2189     buf_len += (int)strlen(module_name);
2190     if (module->version() != NULL) {
2191       module_version = module->version()->as_C_string();
2192       buf_len += (int)strlen(module_version);
2193     }
2194   }
2195 
2196   // Allocate temporary buffer with extra space for formatting and line number
2197   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2198 
2199   // Print stack trace line in buffer
2200   sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2201 
2202   // Print module information
2203   if (module_name != NULL) {
2204     if (module_version != NULL) {
2205       sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2206     } else {
2207       sprintf(buf + (int)strlen(buf), "%s/", module_name);
2208     }
2209   }
2210 
2211   // The method can be NULL if the requested class version is gone
2212   Method* method = holder->method_with_orig_idnum(method_id, version);
2213   if (!version_matches(method, version)) {
2214     strcat(buf, "Redefined)");
2215   } else {
2216     int line_number = Backtrace::get_line_number(method, bci);
2217     if (line_number == -2) {
2218       strcat(buf, "Native Method)");
2219     } else {
2220       if (source_file_name != NULL && (line_number != -1)) {
2221         // Sourcename and linenumber
2222         sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2223       } else if (source_file_name != NULL) {
2224         // Just sourcename
2225         sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2226       } else {
2227         // Neither sourcename nor linenumber
2228         sprintf(buf + (int)strlen(buf), "Unknown Source)");
2229       }
2230       CompiledMethod* nm = method->code();
2231       if (WizardMode && nm != NULL) {
2232         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2233       }
2234     }
2235   }
2236 
2237   st->print_cr("%s", buf);
2238 }
2239 
2240 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2241   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2242   int method_id = method->orig_method_idnum();
2243   int version = method->constants()->version();
2244   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2245 }
2246 
2247 /**
2248  * Print the throwable message and its stack trace plus all causes by walking the
2249  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2250  */
2251 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2252   // First, print the message.
2253   print(throwable(), st);
2254   st->cr();
2255 
2256   // Now print the stack trace.
2257   Thread* THREAD = Thread::current();
2258   while (throwable.not_null()) {
2259     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2260     if (result.is_null()) {
2261       st->print_raw_cr("\t<<no stack trace available>>");
2262       return;
2263     }
2264     BacktraceIterator iter(result, THREAD);
2265 
2266     while (iter.repeat()) {
2267       BacktraceElement bte = iter.next(THREAD);
2268       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2269     }
2270     {
2271       // Call getCause() which doesn't necessarily return the _cause field.
2272       EXCEPTION_MARK;
2273       JavaValue cause(T_OBJECT);
2274       JavaCalls::call_virtual(&cause,
2275                               throwable,
2276                               throwable->klass(),
2277                               vmSymbols::getCause_name(),
2278                               vmSymbols::void_throwable_signature(),
2279                               THREAD);
2280       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2281       if (HAS_PENDING_EXCEPTION) {
2282         CLEAR_PENDING_EXCEPTION;
2283         throwable = Handle();
2284       } else {
2285         throwable = Handle(THREAD, (oop) cause.get_jobject());
2286         if (throwable.not_null()) {
2287           st->print("Caused by: ");
2288           print(throwable(), st);
2289           st->cr();
2290         }
2291       }
2292     }
2293   }
2294 }
2295 
2296 /**
2297  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2298  */
2299 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2300   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2301   JavaValue result(T_VOID);
2302   JavaCalls::call_virtual(&result,
2303                           throwable,
2304                           SystemDictionary::Throwable_klass(),
2305                           vmSymbols::printStackTrace_name(),
2306                           vmSymbols::void_method_signature(),
2307                           THREAD);
2308 }
2309 
2310 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2311   if (!StackTraceInThrowable) return;
2312   ResourceMark rm(THREAD);
2313 
2314   // Start out by clearing the backtrace for this object, in case the VM
2315   // runs out of memory while allocating the stack trace
2316   set_backtrace(throwable(), NULL);
2317   // Clear lazily constructed Java level stacktrace if refilling occurs
2318   // This is unnecessary in 1.7+ but harmless
2319   clear_stacktrace(throwable());
2320 
2321   int max_depth = MaxJavaStackTraceDepth;
2322   JavaThread* thread = (JavaThread*)THREAD;
2323 
2324   BacktraceBuilder bt(CHECK);
2325 
2326   // If there is no Java frame just return the method that was being called
2327   // with bci 0
2328   if (!thread->has_last_Java_frame()) {
2329     if (max_depth >= 1 && method() != NULL) {
2330       bt.push(method(), 0, CHECK);
2331       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2332       set_depth(throwable(), 1);
2333       set_backtrace(throwable(), bt.backtrace());
2334     }
2335     return;
2336   }
2337 
2338   // Instead of using vframe directly, this version of fill_in_stack_trace
2339   // basically handles everything by hand. This significantly improved the
2340   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2341   // See bug 6333838 for  more details.
2342   // The "ASSERT" here is to verify this method generates the exactly same stack
2343   // trace as utilizing vframe.
2344 #ifdef ASSERT
2345   vframeStream st(thread);
2346   methodHandle st_method(THREAD, st.method());
2347 #endif
2348   int total_count = 0;
2349   RegisterMap map(thread, false);
2350   int decode_offset = 0;
2351   CompiledMethod* nm = NULL;
2352   bool skip_fillInStackTrace_check = false;
2353   bool skip_throwableInit_check = false;
2354   bool skip_hidden = !ShowHiddenFrames;
2355 
2356   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2357     Method* method = NULL;
2358     int bci = 0;
2359 
2360     // Compiled java method case.
2361     if (decode_offset != 0) {
2362       DebugInfoReadStream stream(nm, decode_offset);
2363       decode_offset = stream.read_int();
2364       method = (Method*)nm->metadata_at(stream.read_int());
2365       bci = stream.read_bci();
2366     } else {
2367       if (fr.is_first_frame()) break;
2368       address pc = fr.pc();
2369       if (fr.is_interpreted_frame()) {
2370         address bcp = fr.interpreter_frame_bcp();
2371         method = fr.interpreter_frame_method();
2372         bci =  method->bci_from(bcp);
2373         fr = fr.sender(&map);
2374       } else {
2375         CodeBlob* cb = fr.cb();
2376         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2377         // but non nmethod
2378         fr = fr.sender(&map);
2379         if (cb == NULL || !cb->is_compiled()) {
2380           continue;
2381         }
2382         nm = cb->as_compiled_method();
2383         if (nm->method()->is_native()) {
2384           method = nm->method();
2385           bci = 0;
2386         } else {
2387           PcDesc* pd = nm->pc_desc_at(pc);
2388           decode_offset = pd->scope_decode_offset();
2389           // if decode_offset is not equal to 0, it will execute the
2390           // "compiled java method case" at the beginning of the loop.
2391           continue;
2392         }
2393       }
2394     }
2395 #ifdef ASSERT
2396     assert(st_method() == method && st.bci() == bci,
2397            "Wrong stack trace");
2398     st.next();
2399     // vframeStream::method isn't GC-safe so store off a copy
2400     // of the Method* in case we GC.
2401     if (!st.at_end()) {
2402       st_method = st.method();
2403     }
2404 #endif
2405 
2406     // the format of the stacktrace will be:
2407     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2408     // - 0 or more <init> methods for the exception class (skipped)
2409     // - rest of the stack
2410 
2411     if (!skip_fillInStackTrace_check) {
2412       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2413           throwable->is_a(method->method_holder())) {
2414         continue;
2415       }
2416       else {
2417         skip_fillInStackTrace_check = true; // gone past them all
2418       }
2419     }
2420     if (!skip_throwableInit_check) {
2421       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2422 
2423       // skip <init> methods of the exception class and superclasses
2424       // This is simlar to classic VM.
2425       if (method->name() == vmSymbols::object_initializer_name() &&
2426           throwable->is_a(method->method_holder())) {
2427         continue;
2428       } else {
2429         // there are none or we've seen them all - either way stop checking
2430         skip_throwableInit_check = true;
2431       }
2432     }
2433     if (method->is_hidden()) {
2434       if (skip_hidden)  continue;
2435     }
2436     bt.push(method, bci, CHECK);
2437     total_count++;
2438   }
2439 
2440   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2441 
2442   // Put completed stack trace into throwable object
2443   set_backtrace(throwable(), bt.backtrace());
2444   set_depth(throwable(), total_count);
2445 }
2446 
2447 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2448   // No-op if stack trace is disabled
2449   if (!StackTraceInThrowable) {
2450     return;
2451   }
2452 
2453   // Disable stack traces for some preallocated out of memory errors
2454   if (!Universe::should_fill_in_stack_trace(throwable)) {
2455     return;
2456   }
2457 
2458   PRESERVE_EXCEPTION_MARK;
2459 
2460   JavaThread* thread = JavaThread::active();
2461   fill_in_stack_trace(throwable, method, thread);
2462   // ignore exceptions thrown during stack trace filling
2463   CLEAR_PENDING_EXCEPTION;
2464 }
2465 
2466 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2467   // Allocate stack trace - backtrace is created but not filled in
2468 
2469   // No-op if stack trace is disabled
2470   if (!StackTraceInThrowable) return;
2471   BacktraceBuilder bt(CHECK);   // creates a backtrace
2472   set_backtrace(throwable(), bt.backtrace());
2473 }
2474 
2475 
2476 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2477   // Fill in stack trace into preallocated backtrace (no GC)
2478 
2479   // No-op if stack trace is disabled
2480   if (!StackTraceInThrowable) return;
2481 
2482   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2483 
2484   JavaThread* THREAD = JavaThread::current();
2485 
2486   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2487   assert(backtrace.not_null(), "backtrace should have been preallocated");
2488 
2489   ResourceMark rm(THREAD);
2490   vframeStream st(THREAD);
2491 
2492   BacktraceBuilder bt(THREAD, backtrace);
2493 
2494   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2495   // methods as preallocated errors aren't created by "java" code.
2496 
2497   // fill in as much stack trace as possible
2498   int chunk_count = 0;
2499   for (;!st.at_end(); st.next()) {
2500     bt.push(st.method(), st.bci(), CHECK);
2501     chunk_count++;
2502 
2503     // Bail-out for deep stacks
2504     if (chunk_count >= trace_chunk_size) break;
2505   }
2506   set_depth(throwable(), chunk_count);
2507   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2508 
2509   // We support the Throwable immutability protocol defined for Java 7.
2510   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2511   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2512 }
2513 
2514 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2515                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2516 
2517   if (throwable.is_null() || stack_trace_array_h.is_null()) {
2518     THROW(vmSymbols::java_lang_NullPointerException());
2519   }
2520 
2521   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2522 
2523   if (stack_trace_array_h->length() != depth(throwable())) {
2524     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2525   }
2526 
2527   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2528   BacktraceIterator iter(result, THREAD);
2529 
2530   int index = 0;
2531   while (iter.repeat()) {
2532     BacktraceElement bte = iter.next(THREAD);
2533 
2534     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2535 
2536     if (stack_trace_element.is_null()) {
2537       THROW(vmSymbols::java_lang_NullPointerException());
2538     }
2539 
2540     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2541     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2542 
2543     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2544                                          method,
2545                                          bte._version,
2546                                          bte._bci,
2547                                          bte._name, CHECK);
2548   }
2549 }
2550 
2551 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2552   // Allocate java.lang.StackTraceElement instance
2553   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2554   assert(k != NULL, "must be loaded in 1.4+");
2555   if (k->should_be_initialized()) {
2556     k->initialize(CHECK_0);
2557   }
2558 
2559   Handle element = k->allocate_instance_handle(CHECK_0);
2560 
2561   int version = method->constants()->version();
2562   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2563   return element();
2564 }
2565 
2566 void java_lang_StackTraceElement::fill_in(Handle element,
2567                                           InstanceKlass* holder, const methodHandle& method,
2568                                           int version, int bci, Symbol* name, TRAPS) {
2569   assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2570 
2571   // Fill in class name
2572   ResourceMark rm(THREAD);
2573   const char* str = holder->external_name();
2574   oop classname = StringTable::intern(str, CHECK);
2575   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2576   java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2577 
2578   oop loader = holder->class_loader();
2579   if (loader != NULL) {
2580     oop loader_name = java_lang_ClassLoader::name(loader);
2581     if (loader_name != NULL)
2582       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2583   }
2584 
2585   // Fill in method name
2586   oop methodname = StringTable::intern(name, CHECK);
2587   java_lang_StackTraceElement::set_methodName(element(), methodname);
2588 
2589   // Fill in module name and version
2590   ModuleEntry* module = holder->module();
2591   if (module->is_named()) {
2592     oop module_name = StringTable::intern(module->name(), CHECK);
2593     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2594     oop module_version;
2595     if (module->version() != NULL) {
2596       module_version = StringTable::intern(module->version(), CHECK);
2597     } else {
2598       module_version = NULL;
2599     }
2600     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2601   }
2602 
2603   if (method() == NULL || !version_matches(method(), version)) {
2604     // The method was redefined, accurate line number information isn't available
2605     java_lang_StackTraceElement::set_fileName(element(), NULL);
2606     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2607   } else {
2608     // Fill in source file name and line number.
2609     Symbol* source = Backtrace::get_source_file_name(holder, version);
2610     if (ShowHiddenFrames && source == NULL)
2611       source = vmSymbols::unknown_class_name();
2612     oop filename = StringTable::intern(source, CHECK);
2613     java_lang_StackTraceElement::set_fileName(element(), filename);
2614 
2615     int line_number = Backtrace::get_line_number(method, bci);
2616     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2617   }
2618 }
2619 
2620 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2621   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2622   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2623   // we should expand MemberName::name when Throwable uses StackTrace
2624   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2625   return method;
2626 }
2627 
2628 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2629   // set Method* or mid/cpref
2630   Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2631   InstanceKlass* ik = method->method_holder();
2632   CallInfo info(method(), ik, CHECK);
2633   MethodHandles::init_method_MemberName(mname, info);
2634   // set bci
2635   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2636   // method may be redefined; store the version
2637   int version = method->constants()->version();
2638   assert((jushort)version == version, "version should be short");
2639   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2640 }
2641 
2642 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2643   ResourceMark rm(THREAD);
2644   Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2645   Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2646   InstanceKlass* holder = InstanceKlass::cast(clazz);
2647   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2648 
2649   short version = stackFrame->short_field(_version_offset);
2650   short bci = stackFrame->short_field(_bci_offset);
2651   Symbol* name = method->name();
2652   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2653 }
2654 
2655 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2656   macro(_memberName_offset,     k, "memberName",  object_signature, false); \
2657   macro(_bci_offset,            k, "bci",         short_signature,  false)
2658 
2659 void java_lang_StackFrameInfo::compute_offsets() {
2660   InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2661   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2662   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2663 }
2664 
2665 #if INCLUDE_CDS
2666 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2667   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2668   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2669 }
2670 #endif
2671 
2672 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2673   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
2674   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
2675   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
2676   macro(_mode_offset,       k, "mode",        int_signature,          false)
2677 
2678 void java_lang_LiveStackFrameInfo::compute_offsets() {
2679   InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2680   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2681 }
2682 
2683 #if INCLUDE_CDS
2684 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2685   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2686 }
2687 #endif
2688 
2689 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2690   macro(override_offset, k, "override", bool_signature, false)
2691 
2692 void java_lang_reflect_AccessibleObject::compute_offsets() {
2693   InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2694   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2695 }
2696 
2697 #if INCLUDE_CDS
2698 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2699   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2700 }
2701 #endif
2702 
2703 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2704   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2705   return (jboolean) reflect->bool_field(override_offset);
2706 }
2707 
2708 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2709   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2710   reflect->bool_field_put(override_offset, (int) value);
2711 }
2712 
2713 #define METHOD_FIELDS_DO(macro) \
2714   macro(clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
2715   macro(name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
2716   macro(returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
2717   macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2718   macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2719   macro(slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
2720   macro(modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
2721   macro(signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
2722   macro(annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
2723   macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2724   macro(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
2725 
2726 void java_lang_reflect_Method::compute_offsets() {
2727   InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2728   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2729 }
2730 
2731 #if INCLUDE_CDS
2732 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2733   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2734 }
2735 #endif
2736 
2737 Handle java_lang_reflect_Method::create(TRAPS) {
2738   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2739   Klass* klass = SystemDictionary::reflect_Method_klass();
2740   // This class is eagerly initialized during VM initialization, since we keep a refence
2741   // to one of the methods
2742   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2743   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2744 }
2745 
2746 oop java_lang_reflect_Method::clazz(oop reflect) {
2747   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2748   return reflect->obj_field(clazz_offset);
2749 }
2750 
2751 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2752   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2753    reflect->obj_field_put(clazz_offset, value);
2754 }
2755 
2756 int java_lang_reflect_Method::slot(oop reflect) {
2757   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2758   return reflect->int_field(slot_offset);
2759 }
2760 
2761 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2762   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2763   reflect->int_field_put(slot_offset, value);
2764 }
2765 
2766 void java_lang_reflect_Method::set_name(oop method, oop value) {
2767   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2768   method->obj_field_put(name_offset, value);
2769 }
2770 
2771 oop java_lang_reflect_Method::return_type(oop method) {
2772   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2773   return method->obj_field(returnType_offset);
2774 }
2775 
2776 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2777   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2778   method->obj_field_put(returnType_offset, value);
2779 }
2780 
2781 oop java_lang_reflect_Method::parameter_types(oop method) {
2782   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2783   return method->obj_field(parameterTypes_offset);
2784 }
2785 
2786 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2787   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2788   method->obj_field_put(parameterTypes_offset, value);
2789 }
2790 
2791 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2792   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2793   method->obj_field_put(exceptionTypes_offset, value);
2794 }
2795 
2796 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2797   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2798   method->int_field_put(modifiers_offset, value);
2799 }
2800 
2801 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2802   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2803   method->obj_field_put(signature_offset, value);
2804 }
2805 
2806 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2807   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2808   method->obj_field_put(annotations_offset, value);
2809 }
2810 
2811 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2812   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2813   method->obj_field_put(parameter_annotations_offset, value);
2814 }
2815 
2816 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2817   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2818   method->obj_field_put(annotation_default_offset, value);
2819 }
2820 
2821 #define CONSTRUCTOR_FIELDS_DO(macro) \
2822   macro(clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
2823   macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2824   macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2825   macro(slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
2826   macro(modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
2827   macro(signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
2828   macro(annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
2829   macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2830 
2831 void java_lang_reflect_Constructor::compute_offsets() {
2832   InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2833   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2834 }
2835 
2836 #if INCLUDE_CDS
2837 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2838   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2839 }
2840 #endif
2841 
2842 Handle java_lang_reflect_Constructor::create(TRAPS) {
2843   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2844   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2845   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2846   InstanceKlass* ik = InstanceKlass::cast(k);
2847   // Ensure it is initialized
2848   ik->initialize(CHECK_NH);
2849   return ik->allocate_instance_handle(THREAD);
2850 }
2851 
2852 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2853   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2854   return reflect->obj_field(clazz_offset);
2855 }
2856 
2857 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2858   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2859    reflect->obj_field_put(clazz_offset, value);
2860 }
2861 
2862 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2863   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2864   return constructor->obj_field(parameterTypes_offset);
2865 }
2866 
2867 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2868   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2869   constructor->obj_field_put(parameterTypes_offset, value);
2870 }
2871 
2872 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2873   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2874   constructor->obj_field_put(exceptionTypes_offset, value);
2875 }
2876 
2877 int java_lang_reflect_Constructor::slot(oop reflect) {
2878   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2879   return reflect->int_field(slot_offset);
2880 }
2881 
2882 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2883   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2884   reflect->int_field_put(slot_offset, value);
2885 }
2886 
2887 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2888   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2889   constructor->int_field_put(modifiers_offset, value);
2890 }
2891 
2892 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2893   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2894   constructor->obj_field_put(signature_offset, value);
2895 }
2896 
2897 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2898   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2899   constructor->obj_field_put(annotations_offset, value);
2900 }
2901 
2902 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2903   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2904   method->obj_field_put(parameter_annotations_offset, value);
2905 }
2906 
2907 #define FIELD_FIELDS_DO(macro) \
2908   macro(clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
2909   macro(name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
2910   macro(type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
2911   macro(slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
2912   macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
2913   macro(signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
2914   macro(annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
2915 
2916 void java_lang_reflect_Field::compute_offsets() {
2917   InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2918   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2919 }
2920 
2921 #if INCLUDE_CDS
2922 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2923   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2924 }
2925 #endif
2926 
2927 Handle java_lang_reflect_Field::create(TRAPS) {
2928   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2929   Symbol* name = vmSymbols::java_lang_reflect_Field();
2930   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2931   InstanceKlass* ik = InstanceKlass::cast(k);
2932   // Ensure it is initialized
2933   ik->initialize(CHECK_NH);
2934   return ik->allocate_instance_handle(THREAD);
2935 }
2936 
2937 oop java_lang_reflect_Field::clazz(oop reflect) {
2938   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2939   return reflect->obj_field(clazz_offset);
2940 }
2941 
2942 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2943   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2944    reflect->obj_field_put(clazz_offset, value);
2945 }
2946 
2947 oop java_lang_reflect_Field::name(oop field) {
2948   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2949   return field->obj_field(name_offset);
2950 }
2951 
2952 void java_lang_reflect_Field::set_name(oop field, oop value) {
2953   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2954   field->obj_field_put(name_offset, value);
2955 }
2956 
2957 oop java_lang_reflect_Field::type(oop field) {
2958   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2959   return field->obj_field(type_offset);
2960 }
2961 
2962 void java_lang_reflect_Field::set_type(oop field, oop value) {
2963   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2964   field->obj_field_put(type_offset, value);
2965 }
2966 
2967 int java_lang_reflect_Field::slot(oop reflect) {
2968   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2969   return reflect->int_field(slot_offset);
2970 }
2971 
2972 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2973   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2974   reflect->int_field_put(slot_offset, value);
2975 }
2976 
2977 int java_lang_reflect_Field::modifiers(oop field) {
2978   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2979   return field->int_field(modifiers_offset);
2980 }
2981 
2982 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2983   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2984   field->int_field_put(modifiers_offset, value);
2985 }
2986 
2987 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2988   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2989   field->obj_field_put(signature_offset, value);
2990 }
2991 
2992 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2993   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2994   field->obj_field_put(annotations_offset, value);
2995 }
2996 
2997 #define CONSTANTPOOL_FIELDS_DO(macro) \
2998   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
2999 
3000 void reflect_ConstantPool::compute_offsets() {
3001   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3002   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3003   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3004 }
3005 
3006 #if INCLUDE_CDS
3007 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3008   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3009 }
3010 #endif
3011 
3012 #define PARAMETER_FIELDS_DO(macro) \
3013   macro(name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3014   macro(modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3015   macro(index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3016   macro(executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3017 
3018 void java_lang_reflect_Parameter::compute_offsets() {
3019   InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3020   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3021 }
3022 
3023 #if INCLUDE_CDS
3024 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3025   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3026 }
3027 #endif
3028 
3029 Handle java_lang_reflect_Parameter::create(TRAPS) {
3030   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3031   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3032   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3033   InstanceKlass* ik = InstanceKlass::cast(k);
3034   // Ensure it is initialized
3035   ik->initialize(CHECK_NH);
3036   return ik->allocate_instance_handle(THREAD);
3037 }
3038 
3039 oop java_lang_reflect_Parameter::name(oop param) {
3040   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3041   return param->obj_field(name_offset);
3042 }
3043 
3044 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3045   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3046   param->obj_field_put(name_offset, value);
3047 }
3048 
3049 int java_lang_reflect_Parameter::modifiers(oop param) {
3050   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3051   return param->int_field(modifiers_offset);
3052 }
3053 
3054 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3055   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3056   param->int_field_put(modifiers_offset, value);
3057 }
3058 
3059 int java_lang_reflect_Parameter::index(oop param) {
3060   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3061   return param->int_field(index_offset);
3062 }
3063 
3064 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3065   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3066   param->int_field_put(index_offset, value);
3067 }
3068 
3069 oop java_lang_reflect_Parameter::executable(oop param) {
3070   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3071   return param->obj_field(executable_offset);
3072 }
3073 
3074 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3075   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3076   param->obj_field_put(executable_offset, value);
3077 }
3078 
3079 
3080 int java_lang_Module::loader_offset;
3081 int java_lang_Module::name_offset;
3082 int java_lang_Module::_module_entry_offset = -1;
3083 
3084 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3085   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3086   return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3087                           vmSymbols::java_lang_module_init_signature(),
3088                           loader, module_name, CHECK_NH);
3089 }
3090 
3091 #define MODULE_FIELDS_DO(macro) \
3092   macro(loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3093   macro(name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3094 
3095 void java_lang_Module::compute_offsets() {
3096   InstanceKlass* k = SystemDictionary::Module_klass();
3097   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3098   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3099 }
3100 
3101 #if INCLUDE_CDS
3102 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3103   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3104   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3105 }
3106 #endif
3107 
3108 oop java_lang_Module::loader(oop module) {
3109   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3110   return module->obj_field(loader_offset);
3111 }
3112 
3113 void java_lang_Module::set_loader(oop module, oop value) {
3114   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3115   module->obj_field_put(loader_offset, value);
3116 }
3117 
3118 oop java_lang_Module::name(oop module) {
3119   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3120   return module->obj_field(name_offset);
3121 }
3122 
3123 void java_lang_Module::set_name(oop module, oop value) {
3124   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3125   module->obj_field_put(name_offset, value);
3126 }
3127 
3128 ModuleEntry* java_lang_Module::module_entry(oop module) {
3129   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3130   assert(module != NULL, "module can't be null");
3131   assert(oopDesc::is_oop(module), "module must be oop");
3132 
3133   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3134   if (module_entry == NULL) {
3135     // If the inject field containing the ModuleEntry* is null then return the
3136     // class loader's unnamed module.
3137     oop loader = java_lang_Module::loader(module);
3138     Handle h_loader = Handle(Thread::current(), loader);
3139     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3140     return loader_cld->unnamed_module();
3141   }
3142   return module_entry;
3143 }
3144 
3145 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3146   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3147   assert(module != NULL, "module can't be null");
3148   assert(oopDesc::is_oop(module), "module must be oop");
3149   module->address_field_put(_module_entry_offset, (address)module_entry);
3150 }
3151 
3152 Handle reflect_ConstantPool::create(TRAPS) {
3153   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3154   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3155   // Ensure it is initialized
3156   k->initialize(CHECK_NH);
3157   return k->allocate_instance_handle(THREAD);
3158 }
3159 
3160 
3161 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3162   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3163   oop mirror = value->pool_holder()->java_mirror();
3164   // Save the mirror to get back the constant pool.
3165   reflect->obj_field_put(_oop_offset, mirror);
3166 }
3167 
3168 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3169   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3170 
3171   oop mirror = reflect->obj_field(_oop_offset);
3172   Klass* k = java_lang_Class::as_Klass(mirror);
3173   assert(k->is_instance_klass(), "Must be");
3174 
3175   // Get the constant pool back from the klass.  Since class redefinition
3176   // merges the new constant pool into the old, this is essentially the
3177   // same constant pool as the original.  If constant pool merging is
3178   // no longer done in the future, this will have to change to save
3179   // the original.
3180   return InstanceKlass::cast(k)->constants();
3181 }
3182 
3183 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3184   macro(_base_offset, k, "base", object_signature, false)
3185 
3186 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3187   InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3188   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3189 }
3190 
3191 #if INCLUDE_CDS
3192 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3193   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3194 }
3195 #endif
3196 
3197 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3198   Klass* k = SystemDictionary::box_klass(type);
3199   if (k == NULL)  return NULL;
3200   InstanceKlass* ik = InstanceKlass::cast(k);
3201   if (!ik->is_initialized())  ik->initialize(CHECK_0);
3202   return ik->allocate_instance(THREAD);
3203 }
3204 
3205 
3206 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3207   oop box = initialize_and_allocate(type, CHECK_0);
3208   if (box == NULL)  return NULL;
3209   switch (type) {
3210     case T_BOOLEAN:
3211       box->bool_field_put(value_offset, value->z);
3212       break;
3213     case T_CHAR:
3214       box->char_field_put(value_offset, value->c);
3215       break;
3216     case T_FLOAT:
3217       box->float_field_put(value_offset, value->f);
3218       break;
3219     case T_DOUBLE:
3220       box->double_field_put(long_value_offset, value->d);
3221       break;
3222     case T_BYTE:
3223       box->byte_field_put(value_offset, value->b);
3224       break;
3225     case T_SHORT:
3226       box->short_field_put(value_offset, value->s);
3227       break;
3228     case T_INT:
3229       box->int_field_put(value_offset, value->i);
3230       break;
3231     case T_LONG:
3232       box->long_field_put(long_value_offset, value->j);
3233       break;
3234     default:
3235       return NULL;
3236   }
3237   return box;
3238 }
3239 
3240 
3241 BasicType java_lang_boxing_object::basic_type(oop box) {
3242   if (box == NULL)  return T_ILLEGAL;
3243   BasicType type = SystemDictionary::box_klass_type(box->klass());
3244   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3245     return T_ILLEGAL;
3246   return type;
3247 }
3248 
3249 
3250 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3251   BasicType type = SystemDictionary::box_klass_type(box->klass());
3252   switch (type) {
3253   case T_BOOLEAN:
3254     value->z = box->bool_field(value_offset);
3255     break;
3256   case T_CHAR:
3257     value->c = box->char_field(value_offset);
3258     break;
3259   case T_FLOAT:
3260     value->f = box->float_field(value_offset);
3261     break;
3262   case T_DOUBLE:
3263     value->d = box->double_field(long_value_offset);
3264     break;
3265   case T_BYTE:
3266     value->b = box->byte_field(value_offset);
3267     break;
3268   case T_SHORT:
3269     value->s = box->short_field(value_offset);
3270     break;
3271   case T_INT:
3272     value->i = box->int_field(value_offset);
3273     break;
3274   case T_LONG:
3275     value->j = box->long_field(long_value_offset);
3276     break;
3277   default:
3278     return T_ILLEGAL;
3279   } // end switch
3280   return type;
3281 }
3282 
3283 
3284 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3285   BasicType type = SystemDictionary::box_klass_type(box->klass());
3286   switch (type) {
3287   case T_BOOLEAN:
3288     box->bool_field_put(value_offset, value->z);
3289     break;
3290   case T_CHAR:
3291     box->char_field_put(value_offset, value->c);
3292     break;
3293   case T_FLOAT:
3294     box->float_field_put(value_offset, value->f);
3295     break;
3296   case T_DOUBLE:
3297     box->double_field_put(long_value_offset, value->d);
3298     break;
3299   case T_BYTE:
3300     box->byte_field_put(value_offset, value->b);
3301     break;
3302   case T_SHORT:
3303     box->short_field_put(value_offset, value->s);
3304     break;
3305   case T_INT:
3306     box->int_field_put(value_offset, value->i);
3307     break;
3308   case T_LONG:
3309     box->long_field_put(long_value_offset, value->j);
3310     break;
3311   default:
3312     return T_ILLEGAL;
3313   } // end switch
3314   return type;
3315 }
3316 
3317 
3318 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3319   switch (type) {
3320   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3321   case T_CHAR:      st->print("%d", value->c);                      break;
3322   case T_BYTE:      st->print("%d", value->b);                      break;
3323   case T_SHORT:     st->print("%d", value->s);                      break;
3324   case T_INT:       st->print("%d", value->i);                      break;
3325   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3326   case T_FLOAT:     st->print("%f", value->f);                      break;
3327   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3328   default:          st->print("type %d?", type);                    break;
3329   }
3330 }
3331 
3332 // Support for java_lang_ref_Reference
3333 
3334 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3335   assert(obj != NULL, "sanity");
3336   if (offset != java_lang_ref_Reference::referent_offset) {
3337     return false;
3338   }
3339 
3340   Klass* k = obj->klass();
3341   if (!k->is_instance_klass()) {
3342     return false;
3343   }
3344 
3345   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3346   bool is_reference = ik->reference_type() != REF_NONE;
3347   assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3348   return is_reference;
3349 }
3350 
3351 // Support for java_lang_ref_SoftReference
3352 //
3353 
3354 #define SOFTREFERENCE_FIELDS_DO(macro) \
3355   macro(timestamp_offset,    k, "timestamp", long_signature, false); \
3356   macro(static_clock_offset, k, "clock",     long_signature, true)
3357 
3358 void java_lang_ref_SoftReference::compute_offsets() {
3359   InstanceKlass* k = SystemDictionary::SoftReference_klass();
3360   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3361 }
3362 
3363 #if INCLUDE_CDS
3364 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3365   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3366 }
3367 #endif
3368 
3369 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3370   return ref->long_field(timestamp_offset);
3371 }
3372 
3373 jlong java_lang_ref_SoftReference::clock() {
3374   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3375   oop base = ik->static_field_base_raw();
3376   return base->long_field(static_clock_offset);
3377 }
3378 
3379 void java_lang_ref_SoftReference::set_clock(jlong value) {
3380   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3381   oop base = ik->static_field_base_raw();
3382   base->long_field_put(static_clock_offset, value);
3383 }
3384 
3385 // Support for java_lang_invoke_DirectMethodHandle
3386 
3387 int java_lang_invoke_DirectMethodHandle::_member_offset;
3388 
3389 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3390   oop member_name = NULL;
3391   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3392          "a DirectMethodHandle oop is expected");
3393   return dmh->obj_field(member_offset_in_bytes());
3394 }
3395 
3396 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3397   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3398 
3399 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3400   InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3401   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3402 }
3403 
3404 #if INCLUDE_CDS
3405 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3406   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3407 }
3408 #endif
3409 
3410 // Support for java_lang_invoke_MethodHandle
3411 
3412 int java_lang_invoke_MethodHandle::_type_offset;
3413 int java_lang_invoke_MethodHandle::_form_offset;
3414 
3415 int java_lang_invoke_MemberName::_clazz_offset;
3416 int java_lang_invoke_MemberName::_name_offset;
3417 int java_lang_invoke_MemberName::_type_offset;
3418 int java_lang_invoke_MemberName::_flags_offset;
3419 int java_lang_invoke_MemberName::_method_offset;
3420 int java_lang_invoke_MemberName::_vmindex_offset;
3421 
3422 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3423 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3424 
3425 int java_lang_invoke_LambdaForm::_vmentry_offset;
3426 
3427 #define METHODHANDLE_FIELDS_DO(macro) \
3428   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3429   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
3430 
3431 void java_lang_invoke_MethodHandle::compute_offsets() {
3432   InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3433   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3434 }
3435 
3436 #if INCLUDE_CDS
3437 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3438   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3439 }
3440 #endif
3441 
3442 #define MEMBERNAME_FIELDS_DO(macro) \
3443   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
3444   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
3445   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
3446   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
3447   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
3448 
3449 void java_lang_invoke_MemberName::compute_offsets() {
3450   InstanceKlass* k = SystemDictionary::MemberName_klass();
3451   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3452   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3453 }
3454 
3455 #if INCLUDE_CDS
3456 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3457   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3458   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3459 }
3460 #endif
3461 
3462 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3463   InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3464   assert(k != NULL, "jdk mismatch");
3465   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3466 }
3467 
3468 #if INCLUDE_CDS
3469 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3470   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3471 }
3472 #endif
3473 
3474 #define LAMBDAFORM_FIELDS_DO(macro) \
3475   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3476 
3477 void java_lang_invoke_LambdaForm::compute_offsets() {
3478   InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3479   assert (k != NULL, "jdk mismatch");
3480   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3481 }
3482 
3483 #if INCLUDE_CDS
3484 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3485   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3486 }
3487 #endif
3488 
3489 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3490   return obj != NULL && is_subclass(obj->klass());
3491 }
3492 
3493 
3494 oop java_lang_invoke_MethodHandle::type(oop mh) {
3495   return mh->obj_field(_type_offset);
3496 }
3497 
3498 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3499   mh->obj_field_put(_type_offset, mtype);
3500 }
3501 
3502 oop java_lang_invoke_MethodHandle::form(oop mh) {
3503   assert(_form_offset != 0, "");
3504   return mh->obj_field(_form_offset);
3505 }
3506 
3507 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3508   assert(_form_offset != 0, "");
3509   mh->obj_field_put(_form_offset, lform);
3510 }
3511 
3512 /// MemberName accessors
3513 
3514 oop java_lang_invoke_MemberName::clazz(oop mname) {
3515   assert(is_instance(mname), "wrong type");
3516   return mname->obj_field(_clazz_offset);
3517 }
3518 
3519 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3520   assert(is_instance(mname), "wrong type");
3521   mname->obj_field_put(_clazz_offset, clazz);
3522 }
3523 
3524 oop java_lang_invoke_MemberName::name(oop mname) {
3525   assert(is_instance(mname), "wrong type");
3526   return mname->obj_field(_name_offset);
3527 }
3528 
3529 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3530   assert(is_instance(mname), "wrong type");
3531   mname->obj_field_put(_name_offset, name);
3532 }
3533 
3534 oop java_lang_invoke_MemberName::type(oop mname) {
3535   assert(is_instance(mname), "wrong type");
3536   return mname->obj_field(_type_offset);
3537 }
3538 
3539 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3540   assert(is_instance(mname), "wrong type");
3541   mname->obj_field_put(_type_offset, type);
3542 }
3543 
3544 int java_lang_invoke_MemberName::flags(oop mname) {
3545   assert(is_instance(mname), "wrong type");
3546   return mname->int_field(_flags_offset);
3547 }
3548 
3549 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3550   assert(is_instance(mname), "wrong type");
3551   mname->int_field_put(_flags_offset, flags);
3552 }
3553 
3554 
3555 // Return vmtarget from ResolvedMethodName method field through indirection
3556 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3557   assert(is_instance(mname), "wrong type");
3558   oop method = mname->obj_field(_method_offset);
3559   return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3560 }
3561 
3562 bool java_lang_invoke_MemberName::is_method(oop mname) {
3563   assert(is_instance(mname), "must be MemberName");
3564   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3565 }
3566 
3567 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3568   assert(is_instance(mname), "wrong type");
3569   mname->obj_field_put(_method_offset, resolved_method);
3570 }
3571 
3572 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3573   assert(is_instance(mname), "wrong type");
3574   return (intptr_t) mname->address_field(_vmindex_offset);
3575 }
3576 
3577 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3578   assert(is_instance(mname), "wrong type");
3579   mname->address_field_put(_vmindex_offset, (address) index);
3580 }
3581 
3582 
3583 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3584   assert(is_instance(resolved_method), "wrong type");
3585   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3586   assert(m->is_method(), "must be");
3587   return m;
3588 }
3589 
3590 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3591 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3592   assert(is_instance(resolved_method), "wrong type");
3593   resolved_method->address_field_put(_vmtarget_offset, (address)m);
3594 }
3595 
3596 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3597   // lookup ResolvedMethod oop in the table, or create a new one and intern it
3598   oop resolved_method = ResolvedMethodTable::find_method(m());
3599   if (resolved_method == NULL) {
3600     InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3601     if (!k->is_initialized()) {
3602       k->initialize(CHECK_NULL);
3603     }
3604     oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3605     new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3606     // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3607     // distinct loaders) to ensure the metadata is kept alive.
3608     // This mirror may be different than the one in clazz field.
3609     new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3610     resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3611   }
3612   return resolved_method;
3613 }
3614 
3615 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3616   assert(is_instance(lform), "wrong type");
3617   return lform->obj_field(_vmentry_offset);
3618 }
3619 
3620 
3621 // Support for java_lang_invoke_MethodType
3622 
3623 int java_lang_invoke_MethodType::_rtype_offset;
3624 int java_lang_invoke_MethodType::_ptypes_offset;
3625 
3626 #define METHODTYPE_FIELDS_DO(macro) \
3627   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
3628   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3629 
3630 void java_lang_invoke_MethodType::compute_offsets() {
3631   InstanceKlass* k = SystemDictionary::MethodType_klass();
3632   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3633 }
3634 
3635 #if INCLUDE_CDS
3636 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3637   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3638 }
3639 #endif
3640 
3641 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3642   st->print("(");
3643   objArrayOop pts = ptypes(mt);
3644   for (int i = 0, limit = pts->length(); i < limit; i++) {
3645     java_lang_Class::print_signature(pts->obj_at(i), st);
3646   }
3647   st->print(")");
3648   java_lang_Class::print_signature(rtype(mt), st);
3649 }
3650 
3651 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3652   ResourceMark rm;
3653   stringStream buffer(128);
3654   print_signature(mt, &buffer);
3655   const char* sigstr =       buffer.base();
3656   int         siglen = (int) buffer.size();
3657   Symbol *name;
3658   if (!intern_if_not_found) {
3659     name = SymbolTable::probe(sigstr, siglen);
3660   } else {
3661     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3662   }
3663   return name;
3664 }
3665 
3666 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3667   if (oopDesc::equals(mt1, mt2))
3668     return true;
3669   if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3670     return false;
3671   if (ptype_count(mt1) != ptype_count(mt2))
3672     return false;
3673   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3674     if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3675       return false;
3676   }
3677   return true;
3678 }
3679 
3680 oop java_lang_invoke_MethodType::rtype(oop mt) {
3681   assert(is_instance(mt), "must be a MethodType");
3682   return mt->obj_field(_rtype_offset);
3683 }
3684 
3685 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3686   assert(is_instance(mt), "must be a MethodType");
3687   return (objArrayOop) mt->obj_field(_ptypes_offset);
3688 }
3689 
3690 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3691   return ptypes(mt)->obj_at(idx);
3692 }
3693 
3694 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3695   return ptypes(mt)->length();
3696 }
3697 
3698 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3699   objArrayOop pts = ptypes(mt);
3700   int count = pts->length();
3701   int slots = 0;
3702   for (int i = 0; i < count; i++) {
3703     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3704     slots += type2size[bt];
3705   }
3706   return slots;
3707 }
3708 
3709 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3710   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3711   return type2size[bt];
3712 }
3713 
3714 
3715 // Support for java_lang_invoke_CallSite
3716 
3717 int java_lang_invoke_CallSite::_target_offset;
3718 int java_lang_invoke_CallSite::_context_offset;
3719 
3720 #define CALLSITE_FIELDS_DO(macro) \
3721   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
3722   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3723 
3724 void java_lang_invoke_CallSite::compute_offsets() {
3725   InstanceKlass* k = SystemDictionary::CallSite_klass();
3726   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3727 }
3728 
3729 #if INCLUDE_CDS
3730 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3731   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3732 }
3733 #endif
3734 
3735 oop java_lang_invoke_CallSite::context(oop call_site) {
3736   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3737 
3738   oop dep_oop = call_site->obj_field(_context_offset);
3739   return dep_oop;
3740 }
3741 
3742 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3743 
3744 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3745 
3746 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3747   InstanceKlass* k = SystemDictionary::Context_klass();
3748   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3749 }
3750 
3751 #if INCLUDE_CDS
3752 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3753   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3754 }
3755 #endif
3756 
3757 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3758   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3759   intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3760   DependencyContext dep_ctx(vmdeps_addr);
3761   return dep_ctx;
3762 }
3763 
3764 // Support for java_security_AccessControlContext
3765 
3766 int java_security_AccessControlContext::_context_offset = 0;
3767 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3768 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3769 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3770 
3771 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3772   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
3773   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3774   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
3775   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
3776 
3777 void java_security_AccessControlContext::compute_offsets() {
3778   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3779   InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3780   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3781 }
3782 
3783 #if INCLUDE_CDS
3784 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3785   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3786 }
3787 #endif
3788 
3789 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3790   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3791   // Ensure klass is initialized
3792   SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3793   // Allocate result
3794   oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3795   // Fill in values
3796   result->obj_field_put(_context_offset, context());
3797   result->obj_field_put(_privilegedContext_offset, privileged_context());
3798   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3799   // whitelist AccessControlContexts created by the JVM if present
3800   if (_isAuthorized_offset != -1) {
3801     result->bool_field_put(_isAuthorized_offset, true);
3802   }
3803   return result;
3804 }
3805 
3806 
3807 // Support for java_lang_ClassLoader
3808 
3809 bool java_lang_ClassLoader::offsets_computed = false;
3810 int  java_lang_ClassLoader::_loader_data_offset = -1;
3811 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3812 int  java_lang_ClassLoader::name_offset = -1;
3813 int  java_lang_ClassLoader::nameAndId_offset = -1;
3814 int  java_lang_ClassLoader::unnamedModule_offset = -1;
3815 
3816 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3817   assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3818   return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3819 }
3820 
3821 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3822   assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3823   return RawAccess<>::load_at(loader, _loader_data_offset);
3824 }
3825 
3826 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3827   assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3828   HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3829 }
3830 
3831 #define CLASSLOADER_FIELDS_DO(macro) \
3832   macro(parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
3833   macro(name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
3834   macro(nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
3835   macro(unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
3836   macro(parent_offset,          k1, "parent",               classloader_signature, false)
3837 
3838 void java_lang_ClassLoader::compute_offsets() {
3839   assert(!offsets_computed, "offsets should be initialized only once");
3840   offsets_computed = true;
3841 
3842   InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3843   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3844 
3845   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3846 }
3847 
3848 #if INCLUDE_CDS
3849 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3850   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3851   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3852 }
3853 #endif
3854 
3855 oop java_lang_ClassLoader::parent(oop loader) {
3856   assert(is_instance(loader), "loader must be oop");
3857   return loader->obj_field(parent_offset);
3858 }
3859 
3860 // Returns the name field of this class loader.  If the name field has not
3861 // been set, null will be returned.
3862 oop java_lang_ClassLoader::name(oop loader) {
3863   assert(is_instance(loader), "loader must be oop");
3864   return loader->obj_field(name_offset);
3865 }
3866 
3867 // Returns the nameAndId field of this class loader. The format is
3868 // as follows:
3869 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
3870 //   If the defining loader has no name then <qualified-class-name> @<id>
3871 //   If built-in loader, then omit '@<id>' as there is only one instance.
3872 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3873 oop java_lang_ClassLoader::nameAndId(oop loader) {
3874   assert(is_instance(loader), "loader must be oop");
3875   return loader->obj_field(nameAndId_offset);
3876 }
3877 
3878 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3879   assert(is_instance(loader), "loader must be oop");
3880   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3881   oop acl = loader;
3882   debug_only(jint loop_count = 0);
3883   // This loop taken verbatim from ClassLoader.java:
3884   do {
3885     acl = parent(acl);
3886     if (oopDesc::equals(cl, acl)) {
3887       return true;
3888     }
3889     assert(++loop_count > 0, "loop_count overflow");
3890   } while (acl != NULL);
3891   return false;
3892 }
3893 
3894 bool java_lang_ClassLoader::is_instance(oop obj) {
3895   return obj != NULL && is_subclass(obj->klass());
3896 }
3897 
3898 
3899 // For class loader classes, parallelCapable defined
3900 // based on non-null field
3901 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3902 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3903   if (parallelCapable_offset == -1) {
3904      // Default for backward compatibility is false
3905      return false;
3906   }
3907   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3908 }
3909 
3910 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3911   // Fix for 4474172; see evaluation for more details
3912   loader = non_reflection_class_loader(loader);
3913 
3914   oop cl = SystemDictionary::java_system_loader();
3915   while(cl != NULL) {
3916     if (oopDesc::equals(cl, loader)) return true;
3917     cl = parent(cl);
3918   }
3919   return false;
3920 }
3921 
3922 // Return true if this is one of the class loaders associated with
3923 // the generated bytecodes for reflection.
3924 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3925   if (loader != NULL) {
3926     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3927     // This might be null in non-1.4 JDKs
3928     return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3929   }
3930   return false;
3931 }
3932 
3933 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3934   // See whether this is one of the class loaders associated with
3935   // the generated bytecodes for reflection, and if so, "magically"
3936   // delegate to its parent to prevent class loading from occurring
3937   // in places where applications using reflection didn't expect it.
3938   if (is_reflection_class_loader(loader)) {
3939     return parent(loader);
3940   }
3941   return loader;
3942 }
3943 
3944 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3945   assert(is_instance(loader), "loader must be oop");
3946   return loader->obj_field(unnamedModule_offset);
3947 }
3948 
3949 // Support for java_lang_System
3950 //
3951 #define SYSTEM_FIELDS_DO(macro) \
3952   macro(static_in_offset,  k, "in",  input_stream_signature, true); \
3953   macro(static_out_offset, k, "out", print_stream_signature, true); \
3954   macro(static_err_offset, k, "err", print_stream_signature, true); \
3955   macro(static_security_offset, k, "security", security_manager_signature, true)
3956 
3957 void java_lang_System::compute_offsets() {
3958   InstanceKlass* k = SystemDictionary::System_klass();
3959   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3960 }
3961 
3962 #if INCLUDE_CDS
3963 void java_lang_System::serialize_offsets(SerializeClosure* f) {
3964    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3965 }
3966 #endif
3967 
3968 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3969 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
3970 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
3971 
3972 int java_lang_Class::_klass_offset;
3973 int java_lang_Class::_array_klass_offset;
3974 int java_lang_Class::_oop_size_offset;
3975 int java_lang_Class::_static_oop_field_count_offset;
3976 int java_lang_Class::_class_loader_offset;
3977 int java_lang_Class::_module_offset;
3978 int java_lang_Class::_protection_domain_offset;
3979 int java_lang_Class::_component_mirror_offset;
3980 int java_lang_Class::_init_lock_offset;
3981 int java_lang_Class::_signers_offset;
3982 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3983 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3984 int java_lang_Throwable::backtrace_offset;
3985 int java_lang_Throwable::detailMessage_offset;
3986 int java_lang_Throwable::stackTrace_offset;
3987 int java_lang_Throwable::depth_offset;
3988 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3989 int java_lang_reflect_AccessibleObject::override_offset;
3990 int java_lang_reflect_Method::clazz_offset;
3991 int java_lang_reflect_Method::name_offset;
3992 int java_lang_reflect_Method::returnType_offset;
3993 int java_lang_reflect_Method::parameterTypes_offset;
3994 int java_lang_reflect_Method::exceptionTypes_offset;
3995 int java_lang_reflect_Method::slot_offset;
3996 int java_lang_reflect_Method::modifiers_offset;
3997 int java_lang_reflect_Method::signature_offset;
3998 int java_lang_reflect_Method::annotations_offset;
3999 int java_lang_reflect_Method::parameter_annotations_offset;
4000 int java_lang_reflect_Method::annotation_default_offset;
4001 int java_lang_reflect_Constructor::clazz_offset;
4002 int java_lang_reflect_Constructor::parameterTypes_offset;
4003 int java_lang_reflect_Constructor::exceptionTypes_offset;
4004 int java_lang_reflect_Constructor::slot_offset;
4005 int java_lang_reflect_Constructor::modifiers_offset;
4006 int java_lang_reflect_Constructor::signature_offset;
4007 int java_lang_reflect_Constructor::annotations_offset;
4008 int java_lang_reflect_Constructor::parameter_annotations_offset;
4009 int java_lang_reflect_Field::clazz_offset;
4010 int java_lang_reflect_Field::name_offset;
4011 int java_lang_reflect_Field::type_offset;
4012 int java_lang_reflect_Field::slot_offset;
4013 int java_lang_reflect_Field::modifiers_offset;
4014 int java_lang_reflect_Field::signature_offset;
4015 int java_lang_reflect_Field::annotations_offset;
4016 int java_lang_reflect_Parameter::name_offset;
4017 int java_lang_reflect_Parameter::modifiers_offset;
4018 int java_lang_reflect_Parameter::index_offset;
4019 int java_lang_reflect_Parameter::executable_offset;
4020 int java_lang_boxing_object::value_offset;
4021 int java_lang_boxing_object::long_value_offset;
4022 int java_lang_ref_Reference::referent_offset;
4023 int java_lang_ref_Reference::queue_offset;
4024 int java_lang_ref_Reference::next_offset;
4025 int java_lang_ref_Reference::discovered_offset;
4026 int java_lang_ref_SoftReference::timestamp_offset;
4027 int java_lang_ref_SoftReference::static_clock_offset;
4028 int java_lang_ClassLoader::parent_offset;
4029 int java_lang_System::static_in_offset;
4030 int java_lang_System::static_out_offset;
4031 int java_lang_System::static_err_offset;
4032 int java_lang_System::static_security_offset;
4033 int java_lang_StackTraceElement::methodName_offset;
4034 int java_lang_StackTraceElement::fileName_offset;
4035 int java_lang_StackTraceElement::lineNumber_offset;
4036 int java_lang_StackTraceElement::moduleName_offset;
4037 int java_lang_StackTraceElement::moduleVersion_offset;
4038 int java_lang_StackTraceElement::classLoaderName_offset;
4039 int java_lang_StackTraceElement::declaringClass_offset;
4040 int java_lang_StackTraceElement::declaringClassObject_offset;
4041 int java_lang_StackFrameInfo::_memberName_offset;
4042 int java_lang_StackFrameInfo::_bci_offset;
4043 int java_lang_StackFrameInfo::_version_offset;
4044 int java_lang_LiveStackFrameInfo::_monitors_offset;
4045 int java_lang_LiveStackFrameInfo::_locals_offset;
4046 int java_lang_LiveStackFrameInfo::_operands_offset;
4047 int java_lang_LiveStackFrameInfo::_mode_offset;
4048 int java_lang_AssertionStatusDirectives::classes_offset;
4049 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4050 int java_lang_AssertionStatusDirectives::packages_offset;
4051 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4052 int java_lang_AssertionStatusDirectives::deflt_offset;
4053 int java_nio_Buffer::_limit_offset;
4054 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4055 int reflect_ConstantPool::_oop_offset;
4056 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4057 
4058 
4059 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4060   macro(declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4061   macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4062   macro(moduleName_offset,      k, "moduleName",      string_signature, false); \
4063   macro(moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4064   macro(declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4065   macro(methodName_offset,      k, "methodName",      string_signature, false); \
4066   macro(fileName_offset,        k, "fileName",        string_signature, false); \
4067   macro(lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4068 
4069 // Support for java_lang_StackTraceElement
4070 void java_lang_StackTraceElement::compute_offsets() {
4071   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4072   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4073 }
4074 
4075 #if INCLUDE_CDS
4076 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4077   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4078 }
4079 #endif
4080 
4081 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4082   element->obj_field_put(fileName_offset, value);
4083 }
4084 
4085 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4086   element->obj_field_put(declaringClass_offset, value);
4087 }
4088 
4089 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4090   element->obj_field_put(methodName_offset, value);
4091 }
4092 
4093 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4094   element->int_field_put(lineNumber_offset, value);
4095 }
4096 
4097 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4098   element->obj_field_put(moduleName_offset, value);
4099 }
4100 
4101 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4102   element->obj_field_put(moduleVersion_offset, value);
4103 }
4104 
4105 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4106   element->obj_field_put(classLoaderName_offset, value);
4107 }
4108 
4109 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4110   element->obj_field_put(declaringClassObject_offset, value);
4111 }
4112 
4113 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4114   element->short_field_put(_version_offset, value);
4115 }
4116 
4117 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4118   element->int_field_put(_bci_offset, value);
4119 }
4120 
4121 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4122   element->obj_field_put(_monitors_offset, value);
4123 }
4124 
4125 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4126   element->obj_field_put(_locals_offset, value);
4127 }
4128 
4129 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4130   element->obj_field_put(_operands_offset, value);
4131 }
4132 
4133 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4134   element->int_field_put(_mode_offset, value);
4135 }
4136 
4137 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4138 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4139   macro(classes_offset,        k, "classes",        string_array_signature, false); \
4140   macro(classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4141   macro(packages_offset,       k, "packages",       string_array_signature, false); \
4142   macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4143   macro(deflt_offset,          k, "deflt",          bool_signature,         false)
4144 
4145 void java_lang_AssertionStatusDirectives::compute_offsets() {
4146   InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4147   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4148 }
4149 
4150 #if INCLUDE_CDS
4151 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4152   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4153 }
4154 #endif
4155 
4156 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4157   o->obj_field_put(classes_offset, val);
4158 }
4159 
4160 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4161   o->obj_field_put(classEnabled_offset, val);
4162 }
4163 
4164 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4165   o->obj_field_put(packages_offset, val);
4166 }
4167 
4168 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4169   o->obj_field_put(packageEnabled_offset, val);
4170 }
4171 
4172 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4173   o->bool_field_put(deflt_offset, val);
4174 }
4175 
4176 
4177 // Support for intrinsification of java.nio.Buffer.checkIndex
4178 int java_nio_Buffer::limit_offset() {
4179   return _limit_offset;
4180 }
4181 
4182 #define BUFFER_FIELDS_DO(macro) \
4183   macro(_limit_offset, k, "limit", int_signature, false)
4184 
4185 void java_nio_Buffer::compute_offsets() {
4186   InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4187   assert(k != NULL, "must be loaded in 1.4+");
4188   BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4189 }
4190 
4191 #if INCLUDE_CDS
4192 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4193   BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4194 }
4195 #endif
4196 
4197 #define AOS_FIELDS_DO(macro) \
4198   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4199 
4200 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4201   InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4202   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4203 }
4204 
4205 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4206   assert(_owner_offset != 0, "Must be initialized");
4207   return obj->obj_field(_owner_offset);
4208 }
4209 
4210 #if INCLUDE_CDS
4211 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4212   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4213 }
4214 #endif
4215 
4216 static int member_offset(int hardcoded_offset) {
4217   return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4218 }
4219 
4220 // Compute hard-coded offsets
4221 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4222 // are not available to determine the offset_of_static_fields.
4223 void JavaClasses::compute_hard_coded_offsets() {
4224 
4225   // java_lang_boxing_object
4226   java_lang_boxing_object::value_offset      = member_offset(java_lang_boxing_object::hc_value_offset);
4227   java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4228 
4229   // java_lang_ref_Reference
4230   java_lang_ref_Reference::referent_offset    = member_offset(java_lang_ref_Reference::hc_referent_offset);
4231   java_lang_ref_Reference::queue_offset       = member_offset(java_lang_ref_Reference::hc_queue_offset);
4232   java_lang_ref_Reference::next_offset        = member_offset(java_lang_ref_Reference::hc_next_offset);
4233   java_lang_ref_Reference::discovered_offset  = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4234 }
4235 
4236 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4237 
4238 // Compute non-hard-coded field offsets of all the classes in this file
4239 void JavaClasses::compute_offsets() {
4240   if (UseSharedSpaces) {
4241     assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4242                                               JvmtiExport::has_early_class_hook_env()),
4243            "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4244     // None of the classes used by the rest of this function can be replaced by
4245     // JMVTI ClassFileLoadHook.
4246     // We are safe to use the archived offsets, which have already been restored
4247     // by JavaClasses::serialize_offsets, without computing the offsets again.
4248     return;
4249   }
4250 
4251   // We have already called the compute_offsets() of the
4252   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4253   // earlier inside SystemDictionary::resolve_well_known_classes()
4254   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4255 
4256   // generated interpreter code wants to know about the offsets we just computed:
4257   AbstractAssembler::update_delayed_values();
4258 }
4259 
4260 #if INCLUDE_CDS
4261 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4262 
4263 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4264   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4265 }
4266 #endif
4267 
4268 
4269 #ifndef PRODUCT
4270 
4271 // These functions exist to assert the validity of hard-coded field offsets to guard
4272 // against changes in the class files
4273 
4274 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4275   EXCEPTION_MARK;
4276   fieldDescriptor fd;
4277   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4278   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4279   InstanceKlass* ik = InstanceKlass::cast(k);
4280   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4281   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
4282   if (!ik->find_local_field(f_name, f_sig, &fd)) {
4283     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4284     return false;
4285   }
4286   if (fd.is_static()) {
4287     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4288     return false;
4289   }
4290   if (fd.offset() == hardcoded_offset ) {
4291     return true;
4292   } else {
4293     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4294                   klass_name, field_name, hardcoded_offset, fd.offset());
4295     return false;
4296   }
4297 }
4298 
4299 // Check the hard-coded field offsets of all the classes in this file
4300 
4301 void JavaClasses::check_offsets() {
4302   bool valid = true;
4303 
4304 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4305   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4306 
4307 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4308   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4309 
4310   // Boxed primitive objects (java_lang_boxing_object)
4311 
4312   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
4313   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4314   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
4315   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4316   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
4317   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
4318   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
4319   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4320 
4321   // java.lang.ref.Reference
4322 
4323   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4324   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4325   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4326   // Fake field
4327   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4328 
4329   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4330 }
4331 
4332 #endif // PRODUCT
4333 
4334 int InjectedField::compute_offset() {
4335   InstanceKlass* ik = InstanceKlass::cast(klass());
4336   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4337     if (!may_be_java && !fs.access_flags().is_internal()) {
4338       // Only look at injected fields
4339       continue;
4340     }
4341     if (fs.name() == name() && fs.signature() == signature()) {
4342       return fs.offset();
4343     }
4344   }
4345   ResourceMark rm;
4346   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)" : "");
4347 #ifndef PRODUCT
4348   ik->print();
4349   tty->print_cr("all fields:");
4350   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4351     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4352   }
4353 #endif //PRODUCT
4354   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4355   return -1;
4356 }
4357 
4358 void javaClasses_init() {
4359   JavaClasses::compute_offsets();
4360   JavaClasses::check_offsets();
4361   FilteredFieldsMap::initialize();  // must be done after computing offsets.
4362 }