1 /*
   2  * Copyright (c) 1997, 2023, 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 #ifndef SHARE_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_CLASSFILE_JAVACLASSES_HPP
  27 
  28 #include "classfile/vmClasses.hpp"
  29 #include "oops/instanceKlass.hpp"
  30 #include "oops/oopsHierarchy.hpp"
  31 #include "oops/symbol.hpp"
  32 #include "runtime/handles.hpp"
  33 #include "runtime/os.hpp"
  34 #include "utilities/macros.hpp"
  35 #include "utilities/vmEnums.hpp"
  36 
  37 class JvmtiThreadState;
  38 class RecordComponent;
  39 class SerializeClosure;
  40 
  41 #define CHECK_INIT(offset)  assert(offset != 0, "should be initialized"); return offset;
  42 
  43 // Interface to java.lang.Object objects
  44 
  45 class java_lang_Object : AllStatic {
  46  public:
  47   static void register_natives(TRAPS);
  48 };
  49 
  50 // Interface to java.lang.String objects
  51 
  52 // The flags field is a collection of bits representing boolean values used
  53 // internally by the VM.
  54 #define STRING_INJECTED_FIELDS(macro) \
  55   macro(java_lang_String, flags, byte_signature, false)
  56 
  57 class java_lang_String : AllStatic {
  58  private:
  59   static int _value_offset;
  60   static int _hash_offset;
  61   static int _hashIsZero_offset;
  62   static int _coder_offset;
  63   static int _flags_offset;
  64 
  65   static bool _initialized;
  66 
  67   static Handle basic_create(int length, bool byte_arr, TRAPS);
  68 
  69   static inline void set_coder(oop string, jbyte coder);
  70 
  71   // Bitmasks for values in the injected flags field.
  72   static const uint8_t _deduplication_forbidden_mask = 1 << 0;
  73   static const uint8_t _deduplication_requested_mask = 1 << 1;
  74 
  75   static int flags_offset() { CHECK_INIT(_flags_offset); }
  76   // Return the address of the injected flags field.
  77   static inline uint8_t* flags_addr(oop java_string);
  78   // Test whether the designated bit of the injected flags field is set.
  79   static inline bool is_flag_set(oop java_string, uint8_t flag_mask);
  80   // Atomically test and set the designated bit of the injected flags field,
  81   // returning true if the bit was already set.
  82   static bool test_and_set_flag(oop java_string, uint8_t flag_mask);
  83 
  84   static inline unsigned int hash_code_impl(oop java_string, bool update);
  85 
  86  public:
  87 
  88   // Coders
  89   enum Coder {
  90     CODER_LATIN1 =  0,
  91     CODER_UTF16  =  1
  92   };
  93 
  94   static void compute_offsets();
  95   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
  96 
  97   // Instance creation
  98   static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
  99   static oop    create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
 100   static Handle create_from_str(const char* utf8_str, TRAPS);
 101   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
 102   static Handle create_from_symbol(Symbol* symbol, TRAPS);
 103   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
 104 
 105   static void set_compact_strings(bool value);
 106 
 107   static int value_offset() { CHECK_INIT(_value_offset); }
 108   static int coder_offset() { CHECK_INIT(_coder_offset); }
 109 
 110   static inline void set_value(oop string, typeArrayOop buffer);
 111 
 112   // Set the deduplication_forbidden flag true.  This flag is sticky; once
 113   // set it never gets cleared.  This is set when a String is interned in
 114   // the StringTable, to prevent string deduplication from changing the
 115   // String's value array.
 116   static inline void set_deduplication_forbidden(oop java_string);
 117 
 118   // Test and set the deduplication_requested flag.  Returns the old value
 119   // of the flag.  This flag is sticky; once set it never gets cleared.
 120   // Some GCs may use this flag when deciding whether to request
 121   // deduplication of a String, to avoid multiple requests for the same
 122   // object.
 123   static inline bool test_and_set_deduplication_requested(oop java_string);
 124 
 125   // Accessors
 126   static inline typeArrayOop value(oop java_string);
 127   static inline typeArrayOop value_no_keepalive(oop java_string);
 128   static inline bool hash_is_set(oop string);
 129   static inline bool is_latin1(oop java_string);
 130   static inline bool deduplication_forbidden(oop java_string);
 131   static inline bool deduplication_requested(oop java_string);
 132   static inline int length(oop java_string);
 133   static inline int length(oop java_string, typeArrayOop string_value);
 134   static int utf8_length(oop java_string);
 135   static int utf8_length(oop java_string, typeArrayOop string_value);
 136 
 137   // String converters
 138   static char*  as_utf8_string(oop java_string);
 139   static char*  as_utf8_string(oop java_string, int& length);
 140   static char*  as_utf8_string_full(oop java_string, char* buf, int buflen, int& length);
 141   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 142   static char*  as_utf8_string(oop java_string, int start, int len);
 143   static char*  as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen);
 144   static char*  as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen);
 145   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 146   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 147   static jchar* as_unicode_string_or_null(oop java_string, int& length);
 148   // produce an ascii string with all other values quoted using \u####
 149   static char*  as_quoted_ascii(oop java_string);
 150 
 151   // Compute the hash value for a java.lang.String object which would
 152   // contain the characters passed in.
 153   //
 154   // As the hash value used by the String object itself, in
 155   // String.hashCode().  This value is normally calculated in Java code
 156   // in the String.hashCode method(), but is precomputed for String
 157   // objects in the shared archive file.
 158   // hash P(31) from Kernighan & Ritchie
 159   //
 160   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 161   static unsigned int hash_code(const jchar* s, int len) {
 162     unsigned int h = 0;
 163     while (len-- > 0) {
 164       h = 31*h + (unsigned int) *s;
 165       s++;
 166     }
 167     return h;
 168   }
 169 
 170   static unsigned int hash_code(const jbyte* s, int len) {
 171     unsigned int h = 0;
 172     while (len-- > 0) {
 173       h = 31*h + (((unsigned int) *s) & 0xFF);
 174       s++;
 175     }
 176     return h;
 177   }
 178 
 179   static unsigned int hash_code(oop java_string);
 180   static unsigned int hash_code_noupdate(oop java_string);
 181 
 182   static bool equals(oop java_string, const jchar* chars, int len);
 183   static bool equals(oop str1, oop str2);
 184   static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
 185 
 186   // Conversion between '.' and '/' formats, and allocate a String from the result.
 187   static Handle externalize_classname(Symbol* java_name, TRAPS);
 188 
 189   // Conversion
 190   static Symbol* as_symbol(oop java_string);
 191   static Symbol* as_symbol_or_null(oop java_string);
 192 
 193   // Tester
 194   static inline bool is_instance(oop obj);
 195 
 196   // Debugging
 197   static void print(oop java_string, outputStream* st);
 198   friend class JavaClasses;
 199   friend class StringTable;
 200 };
 201 
 202 
 203 // Interface to java.lang.Class objects
 204 
 205 #define CLASS_INJECTED_FIELDS(macro)                                       \
 206   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 207   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 208   macro(java_lang_Class, oop_size,               int_signature,     false) \
 209   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 210   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 211   macro(java_lang_Class, signers,                object_signature,  false) \
 212   macro(java_lang_Class, source_file,            object_signature,  false) \
 213 
 214 class java_lang_Class : AllStatic {
 215   friend class VMStructs;
 216   friend class JVMCIVMStructs;
 217 
 218  private:
 219 
 220   // The fake offsets are added by the class loader when java.lang.Class is loaded
 221 
 222   static int _klass_offset;
 223   static int _array_klass_offset;
 224 
 225   static int _oop_size_offset;
 226   static int _static_oop_field_count_offset;
 227 
 228   static int _protection_domain_offset;
 229   static int _signers_offset;
 230   static int _class_loader_offset;
 231   static int _module_offset;
 232   static int _component_mirror_offset;
 233   static int _name_offset;
 234   static int _source_file_offset;
 235   static int _classData_offset;
 236   static int _classRedefinedCount_offset;
 237 
 238   static bool _offsets_computed;
 239 
 240   static GrowableArray<Klass*>* _fixup_mirror_list;
 241   static GrowableArray<Klass*>* _fixup_module_field_list;
 242 
 243   static void set_protection_domain(oop java_class, oop protection_domain);
 244   static void set_class_loader(oop java_class, oop class_loader);
 245   static void set_component_mirror(oop java_class, oop comp_mirror);
 246   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
 247                                        Handle classData, TRAPS);
 248   static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
 249  public:
 250   static void allocate_fixup_lists();
 251   static void compute_offsets();
 252 
 253   // Instance creation
 254   static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 255                               Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
 256   static void create_mirror(Klass* k, Handle class_loader, Handle module,
 257                             Handle protection_domain, Handle classData, TRAPS);
 258   static void fixup_mirror(Klass* k, TRAPS);
 259   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 260 
 261   // Archiving
 262   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 263   static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
 264   static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
 265                                       Handle protection_domain,
 266                                       TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
 267 
 268   static void fixup_module_field(Klass* k, Handle module);
 269 
 270   // Conversion
 271   static Klass* as_Klass(oop java_class);
 272   static void set_klass(oop java_class, Klass* klass);
 273   static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
 274   static Symbol* as_signature(oop java_class, bool intern_if_not_found);
 275   static void print_signature(oop java_class, outputStream *st);
 276   static const char* as_external_name(oop java_class);
 277   // Testing
 278   static bool is_instance(oop obj);
 279 
 280   static bool is_primitive(oop java_class);
 281   static BasicType primitive_type(oop java_class);
 282   static oop primitive_mirror(BasicType t);
 283   // JVM_NewArray support
 284   static Klass* array_klass_acquire(oop java_class);
 285   static void release_set_array_klass(oop java_class, Klass* klass);
 286   // compiler support for class operations
 287   static int klass_offset()                { CHECK_INIT(_klass_offset); }
 288   static int array_klass_offset()          { CHECK_INIT(_array_klass_offset); }
 289   // Support for classRedefinedCount field
 290   static int classRedefinedCount(oop the_class_mirror);
 291   static void set_classRedefinedCount(oop the_class_mirror, int value);
 292 
 293   // Support for embedded per-class oops
 294   static oop  protection_domain(oop java_class);
 295   static oop  component_mirror(oop java_class);
 296   static objArrayOop  signers(oop java_class);
 297   static void set_signers(oop java_class, objArrayOop signers);
 298   static oop  class_data(oop java_class);
 299   static void set_class_data(oop java_class, oop classData);
 300 
 301   static int component_mirror_offset() { return _component_mirror_offset; }
 302 
 303   static oop class_loader(oop java_class);
 304   static void set_module(oop java_class, oop module);
 305   static oop module(oop java_class);
 306 
 307   static oop name(Handle java_class, TRAPS);
 308 
 309   static oop source_file(oop java_class);
 310   static void set_source_file(oop java_class, oop source_file);
 311 
 312   static size_t oop_size(oop java_class);
 313   static void set_oop_size(HeapWord* java_class, size_t size);
 314   static int static_oop_field_count(oop java_class);
 315   static void set_static_oop_field_count(oop java_class, int size);
 316 
 317   static GrowableArray<Klass*>* fixup_mirror_list() {
 318     return _fixup_mirror_list;
 319   }
 320   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 321     _fixup_mirror_list = v;
 322   }
 323 
 324   static GrowableArray<Klass*>* fixup_module_field_list() {
 325     return _fixup_module_field_list;
 326   }
 327   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 328     _fixup_module_field_list = v;
 329   }
 330 
 331   // Debugging
 332   friend class JavaClasses;
 333 };
 334 
 335 // Interface to java.lang.Thread objects
 336 
 337 #define THREAD_INJECTED_FIELDS(macro)                                  \
 338   macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
 339   macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
 340   macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
 341   JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
 342 
 343 class java_lang_Thread : AllStatic {
 344   friend class java_lang_VirtualThread;
 345   friend class JVMCIVMStructs;
 346  private:
 347   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 348   // so we compute the offsets at startup rather than hard-wiring them.
 349   static int _holder_offset;
 350   static int _name_offset;
 351   static int _contextClassLoader_offset;
 352   static int _inheritedAccessControlContext_offset;
 353   static int _eetop_offset;
 354   static int _jvmti_thread_state_offset;
 355   static int _jvmti_VTMS_transition_disable_count_offset;
 356   static int _jvmti_is_in_VTMS_transition_offset;
 357   static int _interrupted_offset;
 358   static int _interruptLock_offset;
 359   static int _tid_offset;
 360   static int _continuation_offset;
 361   static int _park_blocker_offset;
 362   static int _scopedValueBindings_offset;
 363   JFR_ONLY(static int _jfr_epoch_offset;)
 364 
 365   static void compute_offsets();
 366 
 367  public:
 368   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 369 
 370   // Returns the JavaThread associated with the thread obj
 371   static JavaThread* thread(oop java_thread);
 372   static JavaThread* thread_acquire(oop java_thread);
 373   // Set JavaThread for instance
 374   static void set_thread(oop java_thread, JavaThread* thread);
 375   static void release_set_thread(oop java_thread, JavaThread* thread);
 376   // FieldHolder
 377   static oop holder(oop java_thread);
 378   // interruptLock
 379   static oop interrupt_lock(oop java_thread);
 380   // Interrupted status
 381   static bool interrupted(oop java_thread);
 382   static void set_interrupted(oop java_thread, bool val);
 383   // Name
 384   static oop name(oop java_thread);
 385   static void set_name(oop java_thread, oop name);
 386   // Priority
 387   static ThreadPriority priority(oop java_thread);
 388   static void set_priority(oop java_thread, ThreadPriority priority);
 389   // Thread group
 390   static oop  threadGroup(oop java_thread);
 391   // Alive (NOTE: this is not really a field, but provides the correct
 392   // definition without doing a Java call)
 393   static bool is_alive(oop java_thread);
 394   // Daemon
 395   static bool is_daemon(oop java_thread);
 396   static void set_daemon(oop java_thread);
 397   // Context ClassLoader
 398   static oop context_class_loader(oop java_thread);
 399   // Control context
 400   static oop inherited_access_control_context(oop java_thread);
 401   // Stack size hint
 402   static jlong stackSize(oop java_thread);
 403   // Thread ID
 404   static int64_t thread_id(oop java_thread);
 405   static ByteSize thread_id_offset();
 406   // Continuation
 407   static inline oop continuation(oop java_thread);
 408 
 409   static JvmtiThreadState* jvmti_thread_state(oop java_thread);
 410   static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
 411   static int  VTMS_transition_disable_count(oop java_thread);
 412   static void inc_VTMS_transition_disable_count(oop java_thread);
 413   static void dec_VTMS_transition_disable_count(oop java_thread);
 414   static bool is_in_VTMS_transition(oop java_thread);
 415   static void set_is_in_VTMS_transition(oop java_thread, bool val);
 416   static int  is_in_VTMS_transition_offset();
 417 
 418   // Clear all scoped value bindings on error
 419   static void clear_scopedValueBindings(oop java_thread);
 420 
 421   // Blocker object responsible for thread parking
 422   static oop park_blocker(oop java_thread);
 423 
 424   // Write thread status info to threadStatus field of java.lang.Thread.
 425   static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
 426   // Read thread status info from threadStatus field of java.lang.Thread.
 427   static JavaThreadStatus get_thread_status(oop java_thread_oop);
 428 
 429   static const char*  thread_status_name(oop java_thread_oop);
 430 
 431   // Fill in current stack trace, can cause GC
 432   static oop async_get_stack_trace(oop java_thread, TRAPS);
 433 
 434   JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
 435   JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
 436   JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
 437 
 438   // Debugging
 439   friend class JavaClasses;
 440 };
 441 
 442 // Interface to java.lang.Thread$FieldHolder objects
 443 
 444 class java_lang_Thread_FieldHolder : AllStatic {
 445  private:
 446   static int _group_offset;
 447   static int _priority_offset;
 448   static int _stackSize_offset;
 449   static int _daemon_offset;
 450   static int _thread_status_offset;
 451 
 452   static void compute_offsets();
 453 
 454  public:
 455   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 456 
 457   static oop threadGroup(oop holder);
 458 
 459   static ThreadPriority priority(oop holder);
 460   static void set_priority(oop holder, ThreadPriority priority);
 461 
 462   static jlong stackSize(oop holder);
 463 
 464   static bool is_daemon(oop holder);
 465   static void set_daemon(oop holder, bool val);
 466 
 467   static void set_thread_status(oop holder, JavaThreadStatus status);
 468   static JavaThreadStatus get_thread_status(oop holder);
 469 
 470   friend class JavaClasses;
 471 };
 472 
 473 // Interface to java.lang.Thread$Constants objects
 474 
 475 class java_lang_Thread_Constants : AllStatic {
 476  private:
 477   static int _static_VTHREAD_GROUP_offset;
 478   static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
 479 
 480   static void compute_offsets();
 481   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 482 
 483  public:
 484   static oop get_VTHREAD_GROUP();
 485 
 486   friend class JavaClasses;
 487 };
 488 
 489 // Interface to java.lang.ThreadGroup objects
 490 
 491 class java_lang_ThreadGroup : AllStatic {
 492  private:
 493   static int _parent_offset;
 494   static int _name_offset;
 495   static int _maxPriority_offset;
 496   static int _daemon_offset;
 497 
 498   static void compute_offsets();
 499  public:
 500   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 501 
 502   // parent ThreadGroup
 503   static oop parent(oop java_thread_group);
 504   // name
 505   static const char* name(oop java_thread_group);
 506   // maxPriority in group
 507   static ThreadPriority maxPriority(oop java_thread_group);
 508   // Daemon
 509   static bool is_daemon(oop java_thread_group);
 510 
 511   // Debugging
 512   friend class JavaClasses;
 513 };
 514 
 515 
 516 // Interface to java.lang.VirtualThread objects
 517 
 518 class java_lang_VirtualThread : AllStatic {
 519  private:
 520   static int static_vthread_scope_offset;
 521   static int _carrierThread_offset;
 522   static int _continuation_offset;
 523   static int _state_offset;
 524   static int _next_offset;
 525   static int _onWaitingList_offset;
 526   static int _recheckInterval_offset;
 527   JFR_ONLY(static int _jfr_epoch_offset;)
 528  public:
 529   enum {
 530     NEW           = 0,
 531     STARTED       = 1,
 532     RUNNING       = 2,
 533     PARKING       = 3,
 534     PARKED        = 4,
 535     PINNED        = 5,
 536     TIMED_PARKING = 6,
 537     TIMED_PARKED  = 7,
 538     TIMED_PINNED  = 8,
 539     UNPARKED      = 9,
 540     YIELDING      = 10,
 541     YIELDED       = 11,
 542     BLOCKING      = 12,
 543     BLOCKED       = 13,
 544     UNBLOCKED     = 14,
 545     TERMINATED    = 99,
 546 
 547     // additional state bits
 548     SUSPENDED    = 1 << 8,   // suspended when unmounted
 549   };
 550 
 551   static void compute_offsets();
 552   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 553 
 554   // Testers
 555   static bool is_subclass(Klass* klass) {
 556     return klass->is_subclass_of(vmClasses::VirtualThread_klass());
 557   }
 558   static bool is_instance(oop obj);
 559 
 560   static oop vthread_scope();
 561   static oop carrier_thread(oop vthread);
 562   static oop continuation(oop vthread);
 563   static int state(oop vthread);
 564   static void set_state(oop vthread, int state);
 565   static oop next(oop vthread);
 566   static void set_next(oop vthread, oop next_vthread);
 567   static bool set_onWaitingList(oop vthread, OopHandle& list_head);
 568   static jbyte recheckInterval(oop vthread);
 569   static void set_recheckInterval(oop vthread, jbyte value);
 570   static bool is_preempted(oop vthread);
 571   static JavaThreadStatus map_state_to_thread_status(int state);
 572 };
 573 
 574 
 575 // Interface to java.lang.Throwable objects
 576 
 577 class java_lang_Throwable: AllStatic {
 578   friend class BacktraceBuilder;
 579   friend class BacktraceIterator;
 580 
 581  private:
 582   // Trace constants
 583   enum {
 584     trace_methods_offset = 0,
 585     trace_bcis_offset    = 1,
 586     trace_mirrors_offset = 2,
 587     trace_names_offset   = 3,
 588     trace_conts_offset   = 4,
 589     trace_next_offset    = 5,
 590     trace_hidden_offset  = 6,
 591     trace_size           = 7,
 592     trace_chunk_size     = 32
 593   };
 594 
 595   static int _backtrace_offset;
 596   static int _detailMessage_offset;
 597   static int _stackTrace_offset;
 598   static int _depth_offset;
 599   static int _cause_offset;
 600   static int _static_unassigned_stacktrace_offset;
 601 
 602   // StackTrace (programmatic access, new since 1.4)
 603   static void clear_stacktrace(oop throwable);
 604   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 605   static void set_stacktrace(oop throwable, oop st_element_array);
 606   static oop unassigned_stacktrace();
 607 
 608  public:
 609   // Backtrace
 610   static oop backtrace(oop throwable);
 611   static void set_backtrace(oop throwable, oop value);
 612   static int depth(oop throwable);
 613   static void set_depth(oop throwable, int value);
 614   static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
 615   // Message
 616   static oop message(oop throwable);
 617   static oop cause(oop throwable);
 618   static void set_message(oop throwable, oop value);
 619   static Symbol* detail_message(oop throwable);
 620   static void print_stack_element(outputStream *st, Method* method, int bci);
 621 
 622   static void compute_offsets();
 623   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 624 
 625   // Allocate space for backtrace (created but stack trace not filled in)
 626   static void allocate_backtrace(Handle throwable, TRAPS);
 627   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 628   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 629   // Fill in current stack trace, can cause GC
 630   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 631   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 632 
 633   // Programmatic access to stack trace
 634   static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
 635 
 636   // For recreating class initialization error exceptions.
 637   static Handle create_initialization_error(JavaThread* current, Handle throwable);
 638 
 639   // Printing
 640   static void print(oop throwable, outputStream* st);
 641   static void print_stack_trace(Handle throwable, outputStream* st);
 642   static void java_printStackTrace(Handle throwable, TRAPS);
 643   // Debugging
 644   friend class JavaClasses;
 645   // Gets the method and bci of the top frame (TOS). Returns false if this failed.
 646   static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
 647 };
 648 
 649 
 650 // Interface to java.lang.reflect.AccessibleObject objects
 651 
 652 class java_lang_reflect_AccessibleObject: AllStatic {
 653  private:
 654   // Note that to reduce dependencies on the JDK we compute these
 655   // offsets at run-time.
 656   static int _override_offset;
 657 
 658   static void compute_offsets();
 659 
 660  public:
 661   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 662 
 663   // Accessors
 664   static jboolean override(oop reflect);
 665   static void set_override(oop reflect, jboolean value);
 666 
 667   // Debugging
 668   friend class JavaClasses;
 669 };
 670 
 671 
 672 // Interface to java.lang.reflect.Method objects
 673 
 674 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 675  private:
 676   // Note that to reduce dependencies on the JDK we compute these
 677   // offsets at run-time.
 678   static int _clazz_offset;
 679   static int _name_offset;
 680   static int _returnType_offset;
 681   static int _parameterTypes_offset;
 682   static int _exceptionTypes_offset;
 683   static int _slot_offset;
 684   static int _modifiers_offset;
 685   static int _signature_offset;
 686   static int _annotations_offset;
 687   static int _parameter_annotations_offset;
 688   static int _annotation_default_offset;
 689 
 690   static void compute_offsets();
 691  public:
 692   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 693 
 694   // Allocation
 695   static Handle create(TRAPS);
 696 
 697   // Accessors
 698   static oop clazz(oop reflect);
 699   static void set_clazz(oop reflect, oop value);
 700 
 701   static void set_name(oop method, oop value);
 702 
 703   static oop return_type(oop method);
 704   static void set_return_type(oop method, oop value);
 705 
 706   static oop parameter_types(oop method);
 707   static void set_parameter_types(oop method, oop value);
 708 
 709   static int slot(oop reflect);
 710   static void set_slot(oop reflect, int value);
 711 
 712   static void set_exception_types(oop method, oop value);
 713   static void set_modifiers(oop method, int value);
 714   static void set_signature(oop method, oop value);
 715   static void set_annotations(oop method, oop value);
 716   static void set_parameter_annotations(oop method, oop value);
 717   static void set_annotation_default(oop method, oop value);
 718 
 719   // Debugging
 720   friend class JavaClasses;
 721 };
 722 
 723 
 724 // Interface to java.lang.reflect.Constructor objects
 725 
 726 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 727  private:
 728   // Note that to reduce dependencies on the JDK we compute these
 729   // offsets at run-time.
 730   static int _clazz_offset;
 731   static int _parameterTypes_offset;
 732   static int _exceptionTypes_offset;
 733   static int _slot_offset;
 734   static int _modifiers_offset;
 735   static int _signature_offset;
 736   static int _annotations_offset;
 737   static int _parameter_annotations_offset;
 738 
 739   static void compute_offsets();
 740  public:
 741   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 742 
 743   // Allocation
 744   static Handle create(TRAPS);
 745 
 746   // Accessors
 747   static oop clazz(oop reflect);
 748   static void set_clazz(oop reflect, oop value);
 749 
 750   static oop parameter_types(oop constructor);
 751   static void set_parameter_types(oop constructor, oop value);
 752 
 753   static int slot(oop reflect);
 754   static void set_slot(oop reflect, int value);
 755 
 756   static void set_exception_types(oop constructor, oop value);
 757   static void set_modifiers(oop constructor, int value);
 758   static void set_signature(oop constructor, oop value);
 759   static void set_annotations(oop constructor, oop value);
 760   static void set_parameter_annotations(oop method, oop value);
 761 
 762   // Debugging
 763   friend class JavaClasses;
 764 };
 765 
 766 
 767 // Interface to java.lang.reflect.Field objects
 768 
 769 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 770  private:
 771   // Note that to reduce dependencies on the JDK we compute these
 772   // offsets at run-time.
 773   static int _clazz_offset;
 774   static int _name_offset;
 775   static int _type_offset;
 776   static int _slot_offset;
 777   static int _modifiers_offset;
 778   static int _trusted_final_offset;
 779   static int _signature_offset;
 780   static int _annotations_offset;
 781 
 782   static void compute_offsets();
 783 
 784  public:
 785   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 786 
 787   // Allocation
 788   static Handle create(TRAPS);
 789 
 790   // Accessors
 791   static oop clazz(oop reflect);
 792   static void set_clazz(oop reflect, oop value);
 793 
 794   static oop name(oop field);
 795   static void set_name(oop field, oop value);
 796 
 797   static oop type(oop field);
 798   static void set_type(oop field, oop value);
 799 
 800   static int slot(oop reflect);
 801   static void set_slot(oop reflect, int value);
 802 
 803   static int modifiers(oop field);
 804   static void set_modifiers(oop field, int value);
 805 
 806   static void set_trusted_final(oop field);
 807 
 808   static void set_signature(oop constructor, oop value);
 809   static void set_annotations(oop constructor, oop value);
 810 
 811   // Debugging
 812   friend class JavaClasses;
 813 };
 814 
 815 class java_lang_reflect_Parameter {
 816  private:
 817   // Note that to reduce dependencies on the JDK we compute these
 818   // offsets at run-time.
 819   static int _name_offset;
 820   static int _modifiers_offset;
 821   static int _index_offset;
 822   static int _executable_offset;
 823 
 824   static void compute_offsets();
 825 
 826  public:
 827   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 828 
 829   // Allocation
 830   static Handle create(TRAPS);
 831 
 832   // Accessors
 833   static oop name(oop field);
 834   static void set_name(oop field, oop value);
 835 
 836   static int index(oop reflect);
 837   static void set_index(oop reflect, int value);
 838 
 839   static int modifiers(oop reflect);
 840   static void set_modifiers(oop reflect, int value);
 841 
 842   static oop executable(oop constructor);
 843   static void set_executable(oop constructor, oop value);
 844 
 845   friend class JavaClasses;
 846 };
 847 
 848 #define MODULE_INJECTED_FIELDS(macro)                            \
 849   macro(java_lang_Module, module_entry, intptr_signature, false)
 850 
 851 class java_lang_Module {
 852   private:
 853     static int _loader_offset;
 854     static int _name_offset;
 855     static int _module_entry_offset;
 856 
 857     static void compute_offsets();
 858 
 859   public:
 860     static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 861 
 862     // Allocation
 863     static Handle create(Handle loader, Handle module_name, TRAPS);
 864 
 865     // Testers
 866     static bool is_instance(oop obj);
 867 
 868     // Accessors
 869     static oop loader(oop module);
 870     static void set_loader(oop module, oop value);
 871 
 872     // CDS
 873     static int module_entry_offset() { return _module_entry_offset; }
 874 
 875     static oop name(oop module);
 876     static void set_name(oop module, oop value);
 877 
 878     static ModuleEntry* module_entry(oop module);
 879     static ModuleEntry* module_entry_raw(oop module);
 880     static void set_module_entry(oop module, ModuleEntry* module_entry);
 881 
 882   friend class JavaClasses;
 883 };
 884 
 885 // Interface to jdk.internal.reflect.ConstantPool objects
 886 class reflect_ConstantPool {
 887  private:
 888   // Note that to reduce dependencies on the JDK we compute these
 889   // offsets at run-time.
 890   static int _oop_offset;
 891 
 892   static void compute_offsets();
 893 
 894  public:
 895   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 896 
 897   // Allocation
 898   static Handle create(TRAPS);
 899 
 900   // Accessors
 901   static void set_cp(oop reflect, ConstantPool* value);
 902   static int oop_offset() { CHECK_INIT(_oop_offset); }
 903 
 904   static ConstantPool* get_cp(oop reflect);
 905 
 906   // Debugging
 907   friend class JavaClasses;
 908 };
 909 
 910 
 911 // Interface to java.lang primitive type boxing objects:
 912 //  - java.lang.Boolean
 913 //  - java.lang.Character
 914 //  - java.lang.Float
 915 //  - java.lang.Double
 916 //  - java.lang.Byte
 917 //  - java.lang.Short
 918 //  - java.lang.Integer
 919 //  - java.lang.Long
 920 
 921 // This could be separated out into 8 individual classes.
 922 
 923 class java_lang_boxing_object: AllStatic {
 924  private:
 925   static int _value_offset;
 926   static int _long_value_offset;
 927 
 928   static void compute_offsets();
 929   static oop initialize_and_allocate(BasicType type, TRAPS);
 930  public:
 931   // Allocation. Returns a boxed value, or null for invalid type.
 932   static oop create(BasicType type, jvalue* value, TRAPS);
 933   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 934   static BasicType get_value(oop box, jvalue* value);
 935   static BasicType set_value(oop box, jvalue* value);
 936   static BasicType basic_type(oop box);
 937   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 938   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 939   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 940   static void print(BasicType type, jvalue* value, outputStream* st);
 941 
 942   static int value_offset(BasicType type) {
 943     return is_double_word_type(type) ? _long_value_offset : _value_offset;
 944   }
 945 
 946   static void serialize_offsets(SerializeClosure* f);
 947 
 948   // Debugging
 949   friend class JavaClasses;
 950 };
 951 
 952 
 953 
 954 // Interface to java.lang.ref.Reference objects
 955 
 956 class java_lang_ref_Reference: AllStatic {
 957   static int _referent_offset;
 958   static int _queue_offset;
 959   static int _next_offset;
 960   static int _discovered_offset;
 961 
 962   static bool _offsets_initialized;
 963 
 964  public:
 965   // Accessors
 966   static inline oop weak_referent_no_keepalive(oop ref);
 967   static inline oop weak_referent(oop ref);
 968   static inline oop phantom_referent_no_keepalive(oop ref);
 969   static inline oop unknown_referent_no_keepalive(oop ref);
 970   static inline void clear_referent(oop ref);
 971   static inline void clear_referent_raw(oop ref);
 972   static inline HeapWord* referent_addr_raw(oop ref);
 973   static inline oop next(oop ref);
 974   static inline void set_next(oop ref, oop value);
 975   static inline void set_next_raw(oop ref, oop value);
 976   static inline HeapWord* next_addr_raw(oop ref);
 977   static inline oop discovered(oop ref);
 978   static inline void set_discovered(oop ref, oop value);
 979   static inline void set_discovered_raw(oop ref, oop value);
 980   static inline HeapWord* discovered_addr_raw(oop ref);
 981   static bool is_referent_field(oop obj, ptrdiff_t offset);
 982   static inline bool is_final(oop ref);
 983   static inline bool is_phantom(oop ref);
 984   static inline bool is_weak(oop ref);
 985   static inline bool is_soft(oop ref);
 986 
 987   static int referent_offset()    { CHECK_INIT(_referent_offset); }
 988   static int queue_offset()       { CHECK_INIT(_queue_offset); }
 989   static int next_offset()        { CHECK_INIT(_next_offset); }
 990   static int discovered_offset()  { CHECK_INIT(_discovered_offset); }
 991 
 992   static void compute_offsets();
 993   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 994 };
 995 
 996 
 997 // Interface to java.lang.ref.SoftReference objects
 998 
 999 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
1000   static int _timestamp_offset;
1001   static int _static_clock_offset;
1002 
1003  public:
1004   // Accessors
1005   static jlong timestamp(oop ref);
1006 
1007   // Accessors for statics
1008   static jlong clock();
1009   static void set_clock(jlong value);
1010 
1011   static void compute_offsets();
1012   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1013 };
1014 
1015 // Interface to java.lang.invoke.MethodHandle objects
1016 
1017 class java_lang_invoke_MethodHandle: AllStatic {
1018   friend class JavaClasses;
1019 
1020  private:
1021   static int _type_offset;               // the MethodType of this MH
1022   static int _form_offset;               // the LambdaForm of this MH
1023 
1024   static void compute_offsets();
1025 
1026  public:
1027   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1028 
1029   // Accessors
1030   static oop            type(oop mh);
1031   static void       set_type(oop mh, oop mtype);
1032 
1033   static oop            form(oop mh);
1034   static void       set_form(oop mh, oop lform);
1035 
1036   // Testers
1037   static bool is_subclass(Klass* klass) {
1038     return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1039   }
1040   static bool is_instance(oop obj);
1041 
1042   // Accessors for code generation:
1043   static int type_offset()             { CHECK_INIT(_type_offset); }
1044   static int form_offset()             { CHECK_INIT(_form_offset); }
1045 };
1046 
1047 // Interface to java.lang.invoke.DirectMethodHandle objects
1048 
1049 class java_lang_invoke_DirectMethodHandle: AllStatic {
1050   friend class JavaClasses;
1051 
1052  private:
1053   static int _member_offset;               // the MemberName of this DMH
1054 
1055   static void compute_offsets();
1056 
1057  public:
1058   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1059 
1060   // Accessors
1061   static oop  member(oop mh);
1062 
1063   // Testers
1064   static bool is_subclass(Klass* klass) {
1065     return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1066   }
1067   static bool is_instance(oop obj);
1068 
1069   // Accessors for code generation:
1070   static int member_offset()           { CHECK_INIT(_member_offset); }
1071 };
1072 
1073 // Interface to java.lang.invoke.LambdaForm objects
1074 // (These are a private interface for managing adapter code generation.)
1075 
1076 class java_lang_invoke_LambdaForm: AllStatic {
1077   friend class JavaClasses;
1078 
1079  private:
1080   static int _vmentry_offset;  // type is MemberName
1081 
1082   static void compute_offsets();
1083 
1084  public:
1085   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1086 
1087   // Accessors
1088   static oop            vmentry(oop lform);
1089 
1090   // Testers
1091   static bool is_subclass(Klass* klass) {
1092     return vmClasses::LambdaForm_klass() != nullptr &&
1093       klass->is_subclass_of(vmClasses::LambdaForm_klass());
1094   }
1095   static bool is_instance(oop obj);
1096 
1097   // Accessors for code generation:
1098   static int vmentry_offset()          { CHECK_INIT(_vmentry_offset); }
1099 };
1100 
1101 // Interface to java.lang.invoke.NativeEntryPoint objects
1102 // (These are a private interface for managing adapter code generation.)
1103 
1104 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1105   friend class JavaClasses;
1106 
1107  private:
1108   static int _method_type_offset;
1109   static int _downcall_stub_address_offset;
1110 
1111   static void compute_offsets();
1112 
1113  public:
1114   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1115 
1116   // Accessors
1117   static oop        method_type(oop entry);
1118   static jlong      downcall_stub_address(oop entry);
1119 
1120   // Testers
1121   static bool is_subclass(Klass* klass) {
1122     return vmClasses::NativeEntryPoint_klass() != nullptr &&
1123       klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1124   }
1125   static bool is_instance(oop obj);
1126 
1127   // Accessors for code generation:
1128   static int method_type_offset_in_bytes()           { return _method_type_offset; }
1129   static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1130 };
1131 
1132 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1133   friend class JavaClasses;
1134 
1135  private:
1136   static int _inputStorage_offset;
1137   static int _outputStorage_offset;
1138   static int _volatileStorage_offset;
1139   static int _stackAlignment_offset;
1140   static int _shadowSpace_offset;
1141   static int _scratch1_offset;
1142   static int _scratch2_offset;
1143 
1144   static void compute_offsets();
1145 
1146  public:
1147   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1148 
1149   // Accessors
1150   static objArrayOop inputStorage(oop entry);
1151   static objArrayOop outputStorage(oop entry);
1152   static objArrayOop volatileStorage(oop entry);
1153   static jint        stackAlignment(oop entry);
1154   static jint        shadowSpace(oop entry);
1155   static oop         scratch1(oop entry);
1156   static oop         scratch2(oop entry);
1157 
1158   // Testers
1159   static bool is_subclass(Klass* klass) {
1160     return vmClasses::ABIDescriptor_klass() != nullptr &&
1161       klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1162   }
1163   static bool is_instance(oop obj);
1164 };
1165 
1166 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1167   friend class JavaClasses;
1168 
1169  private:
1170   static int _type_offset;
1171   static int _indexOrOffset_offset;
1172   static int _segmentMaskOrSize_offset;
1173   static int _debugName_offset;
1174 
1175   static void compute_offsets();
1176 
1177  public:
1178   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1179 
1180   // Accessors
1181   static jbyte  type(oop entry);
1182   static jint   index_or_offset(oop entry);
1183   static jshort segment_mask_or_size(oop entry);
1184   static oop    debugName(oop entry);
1185 
1186   // Testers
1187   static bool is_subclass(Klass* klass) {
1188     return vmClasses::VMStorage_klass() != nullptr &&
1189       klass->is_subclass_of(vmClasses::VMStorage_klass());
1190   }
1191   static bool is_instance(oop obj);
1192 };
1193 
1194 class jdk_internal_foreign_abi_CallConv: AllStatic {
1195   friend class JavaClasses;
1196 
1197  private:
1198   static int _argRegs_offset;
1199   static int _retRegs_offset;
1200 
1201   static void compute_offsets();
1202 
1203  public:
1204   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1205 
1206   // Accessors
1207   static objArrayOop argRegs(oop entry);
1208   static objArrayOop retRegs(oop entry);
1209 
1210   // Testers
1211   static bool is_subclass(Klass* klass) {
1212     return vmClasses::CallConv_klass() != nullptr &&
1213       klass->is_subclass_of(vmClasses::CallConv_klass());
1214   }
1215   static bool is_instance(oop obj);
1216 };
1217 
1218 // Interface to java.lang.invoke.MemberName objects
1219 // (These are a private interface for Java code to query the class hierarchy.)
1220 
1221 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \
1222   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1223 
1224 class java_lang_invoke_ResolvedMethodName : AllStatic {
1225   friend class JavaClasses;
1226 
1227   static int _vmtarget_offset;
1228   static int _vmholder_offset;
1229 
1230   static void compute_offsets();
1231  public:
1232   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1233 
1234   static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1235 
1236   static Method* vmtarget(oop resolved_method);
1237   static void set_vmtarget(oop resolved_method, Method* method);
1238 
1239   static void set_vmholder(oop resolved_method, oop holder);
1240 
1241   // find or create resolved member name
1242   static oop find_resolved_method(const methodHandle& m, TRAPS);
1243 
1244   static bool is_instance(oop resolved_method);
1245 };
1246 
1247 
1248 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1249   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)
1250 
1251 
1252 class java_lang_invoke_MemberName: AllStatic {
1253   friend class JavaClasses;
1254 
1255  private:
1256   // From java.lang.invoke.MemberName:
1257   //    private Class<?>   clazz;       // class in which the method is defined
1258   //    private String     name;        // may be null if not yet materialized
1259   //    private Object     type;        // may be null if not yet materialized
1260   //    private int        flags;       // modifier bits; see reflect.Modifier
1261   //    private ResolvedMethodName method;    // holds VM-specific target value
1262   //    private intptr_t   vmindex;     // member index within class or interface
1263   static int _clazz_offset;
1264   static int _name_offset;
1265   static int _type_offset;
1266   static int _flags_offset;
1267   static int _method_offset;
1268   static int _vmindex_offset;
1269 
1270   static void compute_offsets();
1271 
1272  public:
1273   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1274   // Accessors
1275   static oop            clazz(oop mname);
1276   static void       set_clazz(oop mname, oop clazz);
1277 
1278   static oop            type(oop mname);
1279   static void       set_type(oop mname, oop type);
1280 
1281   static oop            name(oop mname);
1282   static void       set_name(oop mname, oop name);
1283 
1284   static int            flags(oop mname);
1285   static void       set_flags(oop mname, int flags);
1286 
1287   // Link through ResolvedMethodName field to get Method*
1288   static Method*        vmtarget(oop mname);
1289   static void       set_method(oop mname, oop method);
1290 
1291   static intptr_t       vmindex(oop mname);
1292   static void       set_vmindex(oop mname, intptr_t index);
1293 
1294   // Testers
1295   static bool is_subclass(Klass* klass) {
1296     return klass->is_subclass_of(vmClasses::MemberName_klass());
1297   }
1298   static bool is_instance(oop obj);
1299 
1300   static bool is_method(oop obj);
1301 
1302   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1303   enum {
1304     MN_IS_METHOD             = 0x00010000, // method (not constructor)
1305     MN_IS_CONSTRUCTOR        = 0x00020000, // constructor
1306     MN_IS_FIELD              = 0x00040000, // field
1307     MN_IS_TYPE               = 0x00080000, // nested type
1308     MN_CALLER_SENSITIVE      = 0x00100000, // @CallerSensitive annotation detected
1309     MN_TRUSTED_FINAL         = 0x00200000, // trusted final field
1310     MN_HIDDEN_MEMBER         = 0x00400000, // @Hidden annotation detected
1311     MN_REFERENCE_KIND_SHIFT  = 24, // refKind
1312     MN_REFERENCE_KIND_MASK   = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1313     MN_NESTMATE_CLASS        = 0x00000001,
1314     MN_HIDDEN_CLASS          = 0x00000002,
1315     MN_STRONG_LOADER_LINK    = 0x00000004,
1316     MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1317     // Lookup modes
1318     MN_MODULE_MODE           = 0x00000010,
1319     MN_UNCONDITIONAL_MODE    = 0x00000020,
1320     MN_TRUSTED_MODE          = -1
1321   };
1322 
1323   // Accessors for code generation:
1324   static int clazz_offset()   { CHECK_INIT(_clazz_offset); }
1325   static int type_offset()    { CHECK_INIT(_type_offset); }
1326   static int flags_offset()   { CHECK_INIT(_flags_offset); }
1327   static int method_offset()  { CHECK_INIT(_method_offset); }
1328   static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1329 };
1330 
1331 
1332 // Interface to java.lang.invoke.MethodType objects
1333 
1334 class java_lang_invoke_MethodType: AllStatic {
1335   friend class JavaClasses;
1336 
1337  private:
1338   static int _rtype_offset;
1339   static int _ptypes_offset;
1340 
1341   static void compute_offsets();
1342 
1343  public:
1344   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1345   // Accessors
1346   static oop            rtype(oop mt);
1347   static objArrayOop    ptypes(oop mt);
1348 
1349   static oop            ptype(oop mt, int index);
1350   static int            ptype_count(oop mt);
1351 
1352   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1353   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1354 
1355   static Symbol*        as_signature(oop mt, bool intern_if_not_found);
1356   static void           print_signature(oop mt, outputStream* st);
1357 
1358   static bool is_instance(oop obj);
1359 
1360   static bool equals(oop mt1, oop mt2);
1361 
1362   // Accessors for code generation:
1363   static int rtype_offset()  { CHECK_INIT(_rtype_offset); }
1364   static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1365 };
1366 
1367 
1368 // Interface to java.lang.invoke.CallSite objects
1369 
1370 class java_lang_invoke_CallSite: AllStatic {
1371   friend class JavaClasses;
1372 
1373 private:
1374   static int _target_offset;
1375   static int _context_offset;
1376 
1377   static void compute_offsets();
1378 
1379 public:
1380   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1381   // Accessors
1382   static oop              target(          oop site);
1383   static void         set_target(          oop site, oop target);
1384   static void         set_target_volatile( oop site, oop target);
1385 
1386   static oop context_no_keepalive(oop site);
1387 
1388   // Testers
1389   static bool is_subclass(Klass* klass) {
1390     return klass->is_subclass_of(vmClasses::CallSite_klass());
1391   }
1392   static bool is_instance(oop obj);
1393 
1394   // Accessors for code generation:
1395   static int target_offset()  { CHECK_INIT(_target_offset); }
1396   static int context_offset() { CHECK_INIT(_context_offset); }
1397 };
1398 
1399 // Interface to java.lang.invoke.ConstantCallSite objects
1400 
1401 class java_lang_invoke_ConstantCallSite: AllStatic {
1402   friend class JavaClasses;
1403 
1404 private:
1405   static int _is_frozen_offset;
1406 
1407   static void compute_offsets();
1408 
1409 public:
1410   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1411   // Accessors
1412   static jboolean is_frozen(oop site);
1413 
1414   // Testers
1415   static bool is_subclass(Klass* klass) {
1416     return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1417   }
1418   static bool is_instance(oop obj);
1419 };
1420 
1421 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1422 
1423 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1424   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) \
1425   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, last_cleanup, long_signature, false)
1426 
1427 class DependencyContext;
1428 
1429 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1430   friend class JavaClasses;
1431 
1432 private:
1433   static int _vmdependencies_offset;
1434   static int _last_cleanup_offset;
1435 
1436   static void compute_offsets();
1437 
1438 public:
1439   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1440   // Accessors
1441   static DependencyContext vmdependencies(oop context);
1442 
1443   // Testers
1444   static bool is_subclass(Klass* klass) {
1445     return klass->is_subclass_of(vmClasses::Context_klass());
1446   }
1447   static bool is_instance(oop obj);
1448 };
1449 
1450 // Interface to java.security.AccessControlContext objects
1451 
1452 class java_security_AccessControlContext: AllStatic {
1453  private:
1454   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1455   // so we compute the offsets at startup rather than hard-wiring them.
1456   static int _context_offset;
1457   static int _privilegedContext_offset;
1458   static int _isPrivileged_offset;
1459   static int _isAuthorized_offset;
1460 
1461   static void compute_offsets();
1462  public:
1463   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1464   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1465 
1466   // Debugging/initialization
1467   friend class JavaClasses;
1468 };
1469 
1470 
1471 // Interface to java.lang.ClassLoader objects
1472 
1473 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1474   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1475 
1476 class java_lang_ClassLoader : AllStatic {
1477  private:
1478   static int _loader_data_offset;
1479   static int _parent_offset;
1480   static int _parallelCapable_offset;
1481   static int _name_offset;
1482   static int _nameAndId_offset;
1483   static int _unnamedModule_offset;
1484 
1485   static void compute_offsets();
1486 
1487  public:
1488   // Support for CDS
1489   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1490   static int loader_data_offset() { return  _loader_data_offset; }
1491 
1492   static ClassLoaderData* loader_data_acquire(oop loader);
1493   static ClassLoaderData* loader_data(oop loader);
1494   static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1495 
1496   static oop parent(oop loader);
1497   static oop parent_no_keepalive(oop loader);
1498   static oop name(oop loader);
1499   static oop nameAndId(oop loader);
1500   static bool isAncestor(oop loader, oop cl);
1501 
1502   // Support for parallelCapable field
1503   static bool parallelCapable(oop the_class_mirror);
1504 
1505   static bool is_trusted_loader(oop loader);
1506 
1507   // Return true if this is one of the class loaders associated with
1508   // the generated bytecodes for serialization constructor returned
1509   // by sun.reflect.ReflectionFactory::newConstructorForSerialization
1510   static bool is_reflection_class_loader(oop loader);
1511 
1512   // Fix for 4474172
1513   static oop  non_reflection_class_loader(oop loader);
1514 
1515   // Testers
1516   static bool is_subclass(Klass* klass) {
1517     return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1518   }
1519   static bool is_instance(oop obj);
1520 
1521   static oop unnamedModule(oop loader);
1522 
1523   // Debugging
1524   friend class JavaClasses;
1525 };
1526 
1527 
1528 // Interface to java.lang.System objects
1529 
1530 class java_lang_System : AllStatic {
1531  private:
1532   static int _static_in_offset;
1533   static int _static_out_offset;
1534   static int _static_err_offset;
1535   static int _static_security_offset;
1536   static int _static_allow_security_offset;
1537   static int _static_never_offset;
1538 
1539  public:
1540   static int  in_offset() { CHECK_INIT(_static_in_offset); }
1541   static int out_offset() { CHECK_INIT(_static_out_offset); }
1542   static int err_offset() { CHECK_INIT(_static_err_offset); }
1543   static bool allow_security_manager();
1544   static bool has_security_manager();
1545 
1546   static void compute_offsets();
1547   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1548 
1549   // Debugging
1550   friend class JavaClasses;
1551 };
1552 
1553 
1554 // Interface to java.lang.StackTraceElement objects
1555 
1556 class java_lang_StackTraceElement: AllStatic {
1557  private:
1558   static int _declaringClassObject_offset;
1559   static int _classLoaderName_offset;
1560   static int _moduleName_offset;
1561   static int _moduleVersion_offset;
1562   static int _declaringClass_offset;
1563   static int _methodName_offset;
1564   static int _fileName_offset;
1565   static int _lineNumber_offset;
1566 
1567   // Setters
1568   static void set_classLoaderName(oop element, oop value);
1569   static void set_moduleName(oop element, oop value);
1570   static void set_moduleVersion(oop element, oop value);
1571   static void set_declaringClass(oop element, oop value);
1572   static void set_methodName(oop element, oop value);
1573   static void set_fileName(oop element, oop value);
1574   static void set_lineNumber(oop element, int value);
1575   static void set_declaringClassObject(oop element, oop value);
1576 
1577   static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1578                                    const methodHandle& method, int bci,
1579                                    Symbol*& source, oop& source_file, int& line_number, TRAPS);
1580 
1581  public:
1582   // Create an instance of StackTraceElement
1583   static oop create(const methodHandle& method, int bci, TRAPS);
1584 
1585   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1586                       int version, int bci, Symbol* name, TRAPS);
1587 
1588   static void compute_offsets();
1589   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1590 
1591 #if INCLUDE_JVMCI
1592   static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1593 #endif
1594 
1595   // Debugging
1596   friend class JavaClasses;
1597 };
1598 
1599 
1600 class Backtrace: AllStatic {
1601  public:
1602   // Helper backtrace functions to store bci|version together.
1603   static int merge_bci_and_version(int bci, int version);
1604   static int merge_mid_and_cpref(int mid, int cpref);
1605   static int bci_at(unsigned int merged);
1606   static int version_at(unsigned int merged);
1607   static int mid_at(unsigned int merged);
1608   static int cpref_at(unsigned int merged);
1609   static int get_line_number(Method* method, int bci);
1610   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1611 
1612   // Debugging
1613   friend class JavaClasses;
1614 };
1615 
1616 class java_lang_ClassFrameInfo: AllStatic {
1617 private:
1618   static int _classOrMemberName_offset;
1619   static int _flags_offset;
1620 
1621 public:
1622   static oop  classOrMemberName(oop info);
1623   static int  flags(oop info);
1624 
1625   // Setters
1626   static void init_class(Handle stackFrame, const methodHandle& m);
1627   static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1628 
1629   static void compute_offsets();
1630   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1631 
1632   // Debugging
1633   friend class JavaClasses;
1634 };
1635 
1636 // Interface to java.lang.StackFrameInfo objects
1637 
1638 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1639   macro(java_lang_StackFrameInfo, version, short_signature, false)
1640 
1641 class java_lang_StackFrameInfo: AllStatic {
1642 private:
1643   static int _type_offset;
1644   static int _name_offset;
1645   static int _bci_offset;
1646   static int _version_offset;
1647   static int _contScope_offset;
1648 
1649 public:
1650   // Getters
1651   static oop name(oop info);
1652   static oop type(oop info);
1653   static Method* get_method(oop info);
1654 
1655   // Setters
1656   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1657   static void set_name(oop info, oop value);
1658   static void set_type(oop info, oop value);
1659   static void set_bci(oop info, int value);
1660 
1661   static void set_version(oop info, short value);
1662   static void set_contScope(oop info, oop value);
1663 
1664   static void compute_offsets();
1665   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1666 
1667   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1668 
1669   // Debugging
1670   friend class JavaClasses;
1671 };
1672 
1673 class java_lang_LiveStackFrameInfo: AllStatic {
1674  private:
1675   static int _monitors_offset;
1676   static int _locals_offset;
1677   static int _operands_offset;
1678   static int _mode_offset;
1679 
1680  public:
1681   static void set_monitors(oop info, oop value);
1682   static void set_locals(oop info, oop value);
1683   static void set_operands(oop info, oop value);
1684   static void set_mode(oop info, int value);
1685 
1686   static void compute_offsets();
1687   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1688 
1689   // Debugging
1690   friend class JavaClasses;
1691 };
1692 
1693 // Interface to java.lang.reflect.RecordComponent objects
1694 
1695 class java_lang_reflect_RecordComponent: AllStatic {
1696  private:
1697   static int _clazz_offset;
1698   static int _name_offset;
1699   static int _type_offset;
1700   static int _accessor_offset;
1701   static int _signature_offset;
1702   static int _annotations_offset;
1703   static int _typeAnnotations_offset;
1704 
1705   // Setters
1706   static void set_clazz(oop element, oop value);
1707   static void set_name(oop element, oop value);
1708   static void set_type(oop element, oop value);
1709   static void set_accessor(oop element, oop value);
1710   static void set_signature(oop element, oop value);
1711   static void set_annotations(oop element, oop value);
1712   static void set_typeAnnotations(oop element, oop value);
1713 
1714  public:
1715   // Create an instance of RecordComponent
1716   static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1717 
1718   static void compute_offsets();
1719   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1720 
1721   // Debugging
1722   friend class JavaClasses;
1723 };
1724 
1725 
1726 // Interface to java.lang.AssertionStatusDirectives objects
1727 
1728 class java_lang_AssertionStatusDirectives: AllStatic {
1729  private:
1730   static int _classes_offset;
1731   static int _classEnabled_offset;
1732   static int _packages_offset;
1733   static int _packageEnabled_offset;
1734   static int _deflt_offset;
1735 
1736  public:
1737   // Setters
1738   static void set_classes(oop obj, oop val);
1739   static void set_classEnabled(oop obj, oop val);
1740   static void set_packages(oop obj, oop val);
1741   static void set_packageEnabled(oop obj, oop val);
1742   static void set_deflt(oop obj, bool val);
1743 
1744   static void compute_offsets();
1745   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1746 
1747   // Debugging
1748   friend class JavaClasses;
1749 };
1750 
1751 
1752 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1753  private:
1754   static int  _owner_offset;
1755  public:
1756   static void compute_offsets();
1757   static oop  get_owner_threadObj(oop obj);
1758   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1759 };
1760 
1761  // Interface to jdk.internal.misc.UnsafeConsants
1762 
1763 class jdk_internal_misc_UnsafeConstants : AllStatic {
1764  public:
1765   static void set_unsafe_constants();
1766   static void compute_offsets() { }
1767   static void serialize_offsets(SerializeClosure* f) { }
1768 };
1769 
1770 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1771 
1772 class vector_VectorPayload : AllStatic {
1773  private:
1774   static int _payload_offset;
1775  public:
1776   static void set_payload(oop o, oop val);
1777 
1778   static void compute_offsets();
1779   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1780 
1781   // Testers
1782   static bool is_subclass(Klass* klass) {
1783     return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1784   }
1785   static bool is_instance(oop obj);
1786 };
1787 
1788 class java_lang_Integer : AllStatic {
1789 public:
1790   static jint value(oop obj);
1791 };
1792 
1793 class java_lang_Long : AllStatic {
1794 public:
1795   static jlong value(oop obj);
1796 };
1797 
1798 class java_lang_Character : AllStatic {
1799 public:
1800   static jchar value(oop obj);
1801 };
1802 
1803 class java_lang_Short : AllStatic {
1804 public:
1805   static jshort value(oop obj);
1806 };
1807 
1808 class java_lang_Byte : AllStatic {
1809 public:
1810   static jbyte value(oop obj);
1811 };
1812 
1813 class java_lang_Boolean : AllStatic {
1814  private:
1815   static int _static_TRUE_offset;
1816   static int _static_FALSE_offset;
1817  public:
1818   static Symbol* symbol();
1819   static void compute_offsets(InstanceKlass* k);
1820   static oop  get_TRUE(InstanceKlass *k);
1821   static oop  get_FALSE(InstanceKlass *k);
1822   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1823   static jboolean value(oop obj);
1824 };
1825 
1826 class java_lang_Integer_IntegerCache : AllStatic {
1827  private:
1828   static int _static_cache_offset;
1829  public:
1830   static Symbol* symbol();
1831   static void compute_offsets(InstanceKlass* k);
1832   static objArrayOop  cache(InstanceKlass *k);
1833   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1834 };
1835 
1836 class java_lang_Long_LongCache : AllStatic {
1837  private:
1838   static int _static_cache_offset;
1839  public:
1840   static Symbol* symbol();
1841   static void compute_offsets(InstanceKlass* k);
1842   static objArrayOop  cache(InstanceKlass *k);
1843   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1844 };
1845 
1846 class java_lang_Character_CharacterCache : AllStatic {
1847  private:
1848   static int _static_cache_offset;
1849  public:
1850   static Symbol* symbol();
1851   static void compute_offsets(InstanceKlass* k);
1852   static objArrayOop  cache(InstanceKlass *k);
1853   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1854 };
1855 
1856 class java_lang_Short_ShortCache : AllStatic {
1857  private:
1858   static int _static_cache_offset;
1859  public:
1860   static Symbol* symbol();
1861   static void compute_offsets(InstanceKlass* k);
1862   static objArrayOop  cache(InstanceKlass *k);
1863   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1864 };
1865 
1866 class java_lang_Byte_ByteCache : AllStatic {
1867  private:
1868   static int _static_cache_offset;
1869  public:
1870   static Symbol* symbol();
1871   static void compute_offsets(InstanceKlass* k);
1872   static objArrayOop  cache(InstanceKlass *k);
1873   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1874 };
1875 
1876 
1877 // Interface to java.lang.InternalError objects
1878 
1879 #define INTERNALERROR_INJECTED_FIELDS(macro)                      \
1880   macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1881 
1882 class java_lang_InternalError : AllStatic {
1883  private:
1884   static int _during_unsafe_access_offset;
1885  public:
1886   static jboolean during_unsafe_access(oop internal_error);
1887   static void set_during_unsafe_access(oop internal_error);
1888   static void compute_offsets();
1889   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1890 };
1891 
1892 // Use to declare fields that need to be injected into Java classes
1893 // for the JVM to use.  The name_index and signature_index are
1894 // declared in vmSymbols.  The may_be_java flag is used to declare
1895 // fields that might already exist in Java but should be injected if
1896 // they don't.  Otherwise the field is unconditionally injected and
1897 // the JVM uses the injected one.  This is to ensure that name
1898 // collisions don't occur.  In general may_be_java should be false
1899 // unless there's a good reason.
1900 
1901 class InjectedField {
1902  public:
1903   const vmClassID klass_id;
1904   const vmSymbolID name_index;
1905   const vmSymbolID signature_index;
1906   const bool           may_be_java;
1907 
1908 
1909   Klass* klass() const      { return vmClasses::klass_at(klass_id); }
1910   Symbol* name() const      { return lookup_symbol(name_index); }
1911   Symbol* signature() const { return lookup_symbol(signature_index); }
1912 
1913   int compute_offset();
1914 
1915   // Find the Symbol for this index
1916   static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1917     return Symbol::vm_symbol_at(symbol_index);
1918   }
1919 };
1920 
1921 
1922 // Interface to hard-coded offset checking
1923 
1924 enum class InjectedFieldID : int;
1925 
1926 class JavaClasses : AllStatic {
1927  private:
1928 
1929   static InjectedField _injected_fields[];
1930 
1931   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1932  public:
1933 
1934   static int compute_injected_offset(InjectedFieldID id);
1935 
1936   static void compute_offsets();
1937   static void check_offsets() PRODUCT_RETURN;
1938   static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1939   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1940   static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1941 
1942   static void compute_offset(int &dest_offset,
1943                              InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1944                              bool is_static = false);
1945   static void compute_offset(int& dest_offset, InstanceKlass* ik,
1946                              const char* name_string, Symbol* signature_symbol,
1947                              bool is_static = false);
1948 };
1949 
1950 #undef CHECK_INIT
1951 
1952 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP