1 /*
   2  * Copyright (c) 1997, 2024, 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, int max_length = MaxStringPrintSize);
 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, source_file,            object_signature,  false) \
 212   macro(java_lang_Class, init_lock,              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 _init_lock_offset;
 230   static int _signers_offset;
 231   static int _class_loader_offset;
 232   static int _module_offset;
 233   static int _component_mirror_offset;
 234   static int _name_offset;
 235   static int _source_file_offset;
 236   static int _classData_offset;
 237   static int _classRedefinedCount_offset;
 238 
 239   static bool _offsets_computed;
 240 
 241   static GrowableArray<Klass*>* _fixup_mirror_list;
 242   static GrowableArray<Klass*>* _fixup_module_field_list;
 243 
 244   static void set_init_lock(oop java_class, oop init_lock);
 245   static void set_protection_domain(oop java_class, oop protection_domain);
 246   static void set_class_loader(oop java_class, oop class_loader);
 247   static void set_component_mirror(oop java_class, oop comp_mirror);
 248   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
 249                                        Handle classData, TRAPS);
 250   static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module);
 251  public:
 252   static void allocate_fixup_lists();
 253   static void compute_offsets();
 254 
 255   // Instance creation
 256   static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 257                               Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror
 258   static void create_mirror(Klass* k, Handle class_loader, Handle module,
 259                             Handle protection_domain, Handle classData, TRAPS);
 260   static void fixup_mirror(Klass* k, TRAPS);
 261   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 262 
 263   // Archiving
 264   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 265   static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
 266   static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
 267                                       Handle protection_domain,
 268                                       TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
 269 
 270   static void fixup_module_field(Klass* k, Handle module);
 271 
 272   // Conversion
 273   static Klass* as_Klass(oop java_class);
 274   static void set_klass(oop java_class, Klass* klass);
 275   static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr);
 276   static Symbol* as_signature(oop java_class, bool intern_if_not_found);
 277   static void print_signature(oop java_class, outputStream *st);
 278   static const char* as_external_name(oop java_class);
 279   // Testing
 280   static bool is_instance(oop obj);
 281 
 282   static bool is_primitive(oop java_class);
 283   static BasicType primitive_type(oop java_class);
 284   static oop primitive_mirror(BasicType t);
 285   // JVM_NewArray support
 286   static Klass* array_klass_acquire(oop java_class);
 287   static void release_set_array_klass(oop java_class, Klass* klass);
 288   // compiler support for class operations
 289   static int klass_offset()                { CHECK_INIT(_klass_offset); }
 290   static int array_klass_offset()          { CHECK_INIT(_array_klass_offset); }
 291   // Support for classRedefinedCount field
 292   static int classRedefinedCount(oop the_class_mirror);
 293   static void set_classRedefinedCount(oop the_class_mirror, int value);
 294 
 295   // Support for embedded per-class oops
 296   static oop  protection_domain(oop java_class);
 297   static oop  init_lock(oop java_class);
 298   static void clear_init_lock(oop java_class) {
 299     set_init_lock(java_class, nullptr);
 300   }
 301   static oop  component_mirror(oop java_class);
 302   static objArrayOop signers(oop java_class);
 303   static oop  class_data(oop java_class);
 304   static void set_class_data(oop java_class, oop classData);
 305 
 306   static int component_mirror_offset() { return _component_mirror_offset; }
 307 
 308   static oop class_loader(oop java_class);
 309   static void set_module(oop java_class, oop module);
 310   static oop module(oop java_class);
 311 
 312   static oop name(Handle java_class, TRAPS);
 313 
 314   static oop source_file(oop java_class);
 315   static void set_source_file(oop java_class, oop source_file);
 316 
 317   static size_t oop_size(oop java_class);
 318   static void set_oop_size(HeapWord* java_class, size_t size);
 319   static int static_oop_field_count(oop java_class);
 320   static void set_static_oop_field_count(oop java_class, int size);
 321 
 322   static GrowableArray<Klass*>* fixup_mirror_list() {
 323     return _fixup_mirror_list;
 324   }
 325   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 326     _fixup_mirror_list = v;
 327   }
 328 
 329   static GrowableArray<Klass*>* fixup_module_field_list() {
 330     return _fixup_module_field_list;
 331   }
 332   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 333     _fixup_module_field_list = v;
 334   }
 335 
 336   // Debugging
 337   friend class JavaClasses;
 338 };
 339 
 340 // Interface to java.lang.Thread objects
 341 
 342 #define THREAD_INJECTED_FIELDS(macro)                                  \
 343   macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
 344   macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
 345   macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
 346   JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
 347 
 348 class java_lang_Thread : AllStatic {
 349   friend class java_lang_VirtualThread;
 350   friend class JVMCIVMStructs;
 351  private:
 352   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 353   // so we compute the offsets at startup rather than hard-wiring them.
 354   static int _holder_offset;
 355   static int _name_offset;
 356   static int _contextClassLoader_offset;
 357   static int _inheritedAccessControlContext_offset;
 358   static int _eetop_offset;
 359   static int _jvmti_thread_state_offset;
 360   static int _jvmti_VTMS_transition_disable_count_offset;
 361   static int _jvmti_is_in_VTMS_transition_offset;
 362   static int _interrupted_offset;
 363   static int _interruptLock_offset;
 364   static int _tid_offset;
 365   static int _continuation_offset;
 366   static int _park_blocker_offset;
 367   static int _scopedValueBindings_offset;
 368   JFR_ONLY(static int _jfr_epoch_offset;)
 369 
 370   static void compute_offsets();
 371 
 372  public:
 373   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 374 
 375   // Returns the JavaThread associated with the thread obj
 376   static JavaThread* thread(oop java_thread);
 377   static JavaThread* thread_acquire(oop java_thread);
 378   // Set JavaThread for instance
 379   static void set_thread(oop java_thread, JavaThread* thread);
 380   static void release_set_thread(oop java_thread, JavaThread* thread);
 381   // FieldHolder
 382   static oop holder(oop java_thread);
 383   // interruptLock
 384   static oop interrupt_lock(oop java_thread);
 385   // Interrupted status
 386   static bool interrupted(oop java_thread);
 387   static void set_interrupted(oop java_thread, bool val);
 388   // Name
 389   static oop name(oop java_thread);
 390   static void set_name(oop java_thread, oop name);
 391   // Priority
 392   static ThreadPriority priority(oop java_thread);
 393   static void set_priority(oop java_thread, ThreadPriority priority);
 394   // Thread group
 395   static oop  threadGroup(oop java_thread);
 396   // Alive (NOTE: this is not really a field, but provides the correct
 397   // definition without doing a Java call)
 398   static bool is_alive(oop java_thread);
 399   // Daemon
 400   static bool is_daemon(oop java_thread);
 401   static void set_daemon(oop java_thread);
 402   // Context ClassLoader
 403   static oop context_class_loader(oop java_thread);
 404   // Control context
 405   static oop inherited_access_control_context(oop java_thread);
 406   // Stack size hint
 407   static jlong stackSize(oop java_thread);
 408   // Thread ID
 409   static int64_t thread_id(oop java_thread);
 410   static ByteSize thread_id_offset();
 411   // Continuation
 412   static inline oop continuation(oop java_thread);
 413 
 414   static JvmtiThreadState* jvmti_thread_state(oop java_thread);
 415   static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
 416   static int  VTMS_transition_disable_count(oop java_thread);
 417   static void inc_VTMS_transition_disable_count(oop java_thread);
 418   static void dec_VTMS_transition_disable_count(oop java_thread);
 419   static bool is_in_VTMS_transition(oop java_thread);
 420   static void set_is_in_VTMS_transition(oop java_thread, bool val);
 421   static int  is_in_VTMS_transition_offset();
 422 
 423   // Clear all scoped value bindings on error
 424   static void clear_scopedValueBindings(oop java_thread);
 425 
 426   // Blocker object responsible for thread parking
 427   static oop park_blocker(oop java_thread);
 428 
 429   // Write thread status info to threadStatus field of java.lang.Thread.
 430   static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
 431   // Read thread status info from threadStatus field of java.lang.Thread.
 432   static JavaThreadStatus get_thread_status(oop java_thread_oop);
 433 
 434   static const char*  thread_status_name(oop java_thread_oop);
 435 
 436   // Fill in current stack trace, can cause GC
 437   static oop async_get_stack_trace(oop java_thread, TRAPS);
 438 
 439   JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
 440   JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
 441   JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
 442 
 443   // Debugging
 444   friend class JavaClasses;
 445 };
 446 
 447 // Interface to java.lang.Thread$FieldHolder objects
 448 
 449 class java_lang_Thread_FieldHolder : AllStatic {
 450  private:
 451   static int _group_offset;
 452   static int _priority_offset;
 453   static int _stackSize_offset;
 454   static int _daemon_offset;
 455   static int _thread_status_offset;
 456 
 457   static void compute_offsets();
 458 
 459  public:
 460   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 461 
 462   static oop threadGroup(oop holder);
 463 
 464   static ThreadPriority priority(oop holder);
 465   static void set_priority(oop holder, ThreadPriority priority);
 466 
 467   static jlong stackSize(oop holder);
 468 
 469   static bool is_daemon(oop holder);
 470   static void set_daemon(oop holder, bool val);
 471 
 472   static void set_thread_status(oop holder, JavaThreadStatus status);
 473   static JavaThreadStatus get_thread_status(oop holder);
 474 
 475   friend class JavaClasses;
 476 };
 477 
 478 // Interface to java.lang.Thread$Constants objects
 479 
 480 class java_lang_Thread_Constants : AllStatic {
 481  private:
 482   static int _static_VTHREAD_GROUP_offset;
 483   static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
 484 
 485   static void compute_offsets();
 486   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 487 
 488  public:
 489   static oop get_VTHREAD_GROUP();
 490 
 491   friend class JavaClasses;
 492 };
 493 
 494 // Interface to java.lang.ThreadGroup objects
 495 
 496 class java_lang_ThreadGroup : AllStatic {
 497  private:
 498   static int _parent_offset;
 499   static int _name_offset;
 500   static int _maxPriority_offset;
 501   static int _daemon_offset;
 502 
 503   static void compute_offsets();
 504  public:
 505   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 506 
 507   // parent ThreadGroup
 508   static oop parent(oop java_thread_group);
 509   // name
 510   static const char* name(oop java_thread_group);
 511   // maxPriority in group
 512   static ThreadPriority maxPriority(oop java_thread_group);
 513   // Daemon
 514   static bool is_daemon(oop java_thread_group);
 515 
 516   // Debugging
 517   friend class JavaClasses;
 518 };
 519 
 520 
 521 // Interface to java.lang.VirtualThread objects
 522 
 523 class java_lang_VirtualThread : AllStatic {
 524  private:
 525   static int static_vthread_scope_offset;
 526   static int _carrierThread_offset;
 527   static int _continuation_offset;
 528   static int _state_offset;
 529   JFR_ONLY(static int _jfr_epoch_offset;)
 530  public:
 531   enum {
 532     NEW           = 0,
 533     STARTED       = 1,
 534     RUNNING       = 2,
 535     PARKING       = 3,
 536     PARKED        = 4,
 537     PINNED        = 5,
 538     TIMED_PARKING = 6,
 539     TIMED_PARKED  = 7,
 540     TIMED_PINNED  = 8,
 541     UNPARKED      = 9,
 542     YIELDING      = 10,
 543     YIELDED       = 11,
 544     TERMINATED    = 99,
 545 
 546     // additional state bits
 547     SUSPENDED    = 1 << 8,   // suspended when unmounted
 548   };
 549 
 550   static void compute_offsets();
 551   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 552 
 553   // Testers
 554   static bool is_subclass(Klass* klass) {
 555     return klass->is_subclass_of(vmClasses::VirtualThread_klass());
 556   }
 557   static bool is_instance(oop obj);
 558 
 559   static oop vthread_scope();
 560   static oop carrier_thread(oop vthread);
 561   static oop continuation(oop vthread);
 562   static int state(oop vthread);
 563   static JavaThreadStatus map_state_to_thread_status(int state);
 564 };
 565 
 566 
 567 // Interface to java.lang.Throwable objects
 568 
 569 class java_lang_Throwable: AllStatic {
 570   friend class BacktraceBuilder;
 571   friend class BacktraceIterator;
 572 
 573  private:
 574   // Trace constants
 575   enum {
 576     trace_methods_offset = 0,
 577     trace_bcis_offset    = 1,
 578     trace_mirrors_offset = 2,
 579     trace_names_offset   = 3,
 580     trace_conts_offset   = 4,
 581     trace_next_offset    = 5,
 582     trace_hidden_offset  = 6,
 583     trace_size           = 7,
 584     trace_chunk_size     = 32
 585   };
 586 
 587   static int _backtrace_offset;
 588   static int _detailMessage_offset;
 589   static int _stackTrace_offset;
 590   static int _depth_offset;
 591   static int _cause_offset;
 592   static int _static_unassigned_stacktrace_offset;
 593 
 594   // StackTrace (programmatic access, new since 1.4)
 595   static void clear_stacktrace(oop throwable);
 596   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 597   static void set_stacktrace(oop throwable, oop st_element_array);
 598   static oop unassigned_stacktrace();
 599 
 600  public:
 601   // Backtrace
 602   static oop backtrace(oop throwable);
 603   static void set_backtrace(oop throwable, oop value);
 604   static int depth(oop throwable);
 605   static void set_depth(oop throwable, int value);
 606   // Message
 607   static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
 608   static oop message(oop throwable);
 609   static const char* message_as_utf8(oop throwable);
 610   static void set_message(oop throwable, oop value);
 611 
 612   static oop cause(oop throwable);
 613 
 614   static void print_stack_element(outputStream *st, Method* method, int bci);
 615 
 616   static void compute_offsets();
 617   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 618 
 619   // Allocate space for backtrace (created but stack trace not filled in)
 620   static void allocate_backtrace(Handle throwable, TRAPS);
 621   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 622   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 623   // Fill in current stack trace, can cause GC
 624   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 625   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 626 
 627   // Programmatic access to stack trace
 628   static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
 629 
 630   // For recreating class initialization error exceptions.
 631   static Handle create_initialization_error(JavaThread* current, Handle throwable);
 632 
 633   // Printing
 634   static void print(oop throwable, outputStream* st);
 635   static void print_stack_trace(Handle throwable, outputStream* st);
 636   static void java_printStackTrace(Handle throwable, TRAPS);
 637   // Debugging
 638   friend class JavaClasses;
 639   // Gets the method and bci of the top frame (TOS). Returns false if this failed.
 640   static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
 641 };
 642 
 643 
 644 // Interface to java.lang.reflect.AccessibleObject objects
 645 
 646 class java_lang_reflect_AccessibleObject: AllStatic {
 647  private:
 648   // Note that to reduce dependencies on the JDK we compute these
 649   // offsets at run-time.
 650   static int _override_offset;
 651 
 652   static void compute_offsets();
 653 
 654  public:
 655   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 656 
 657   // Accessors
 658   static jboolean override(oop reflect);
 659   static void set_override(oop reflect, jboolean value);
 660 
 661   // Debugging
 662   friend class JavaClasses;
 663 };
 664 
 665 
 666 // Interface to java.lang.reflect.Method objects
 667 
 668 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 669  private:
 670   // Note that to reduce dependencies on the JDK we compute these
 671   // offsets at run-time.
 672   static int _clazz_offset;
 673   static int _name_offset;
 674   static int _returnType_offset;
 675   static int _parameterTypes_offset;
 676   static int _exceptionTypes_offset;
 677   static int _slot_offset;
 678   static int _modifiers_offset;
 679   static int _signature_offset;
 680   static int _annotations_offset;
 681   static int _parameter_annotations_offset;
 682   static int _annotation_default_offset;
 683 
 684   static void compute_offsets();
 685  public:
 686   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 687 
 688   // Allocation
 689   static Handle create(TRAPS);
 690 
 691   // Accessors
 692   static oop clazz(oop reflect);
 693   static void set_clazz(oop reflect, oop value);
 694 
 695   static void set_name(oop method, oop value);
 696 
 697   static oop return_type(oop method);
 698   static void set_return_type(oop method, oop value);
 699 
 700   static oop parameter_types(oop method);
 701   static void set_parameter_types(oop method, oop value);
 702 
 703   static int slot(oop reflect);
 704   static void set_slot(oop reflect, int value);
 705 
 706   static void set_exception_types(oop method, oop value);
 707   static void set_modifiers(oop method, int value);
 708   static void set_signature(oop method, oop value);
 709   static void set_annotations(oop method, oop value);
 710   static void set_parameter_annotations(oop method, oop value);
 711   static void set_annotation_default(oop method, oop value);
 712 
 713   // Debugging
 714   friend class JavaClasses;
 715 };
 716 
 717 
 718 // Interface to java.lang.reflect.Constructor objects
 719 
 720 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 721  private:
 722   // Note that to reduce dependencies on the JDK we compute these
 723   // offsets at run-time.
 724   static int _clazz_offset;
 725   static int _parameterTypes_offset;
 726   static int _exceptionTypes_offset;
 727   static int _slot_offset;
 728   static int _modifiers_offset;
 729   static int _signature_offset;
 730   static int _annotations_offset;
 731   static int _parameter_annotations_offset;
 732 
 733   static void compute_offsets();
 734  public:
 735   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 736 
 737   // Allocation
 738   static Handle create(TRAPS);
 739 
 740   // Accessors
 741   static oop clazz(oop reflect);
 742   static void set_clazz(oop reflect, oop value);
 743 
 744   static oop parameter_types(oop constructor);
 745   static void set_parameter_types(oop constructor, oop value);
 746 
 747   static int slot(oop reflect);
 748   static void set_slot(oop reflect, int value);
 749 
 750   static void set_exception_types(oop constructor, oop value);
 751   static void set_modifiers(oop constructor, int value);
 752   static void set_signature(oop constructor, oop value);
 753   static void set_annotations(oop constructor, oop value);
 754   static void set_parameter_annotations(oop method, oop value);
 755 
 756   // Debugging
 757   friend class JavaClasses;
 758 };
 759 
 760 
 761 // Interface to java.lang.reflect.Field objects
 762 
 763 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 764  private:
 765   // Note that to reduce dependencies on the JDK we compute these
 766   // offsets at run-time.
 767   static int _clazz_offset;
 768   static int _name_offset;
 769   static int _type_offset;
 770   static int _slot_offset;
 771   static int _modifiers_offset;
 772   static int _trusted_final_offset;
 773   static int _signature_offset;
 774   static int _annotations_offset;
 775 
 776   static void compute_offsets();
 777 
 778  public:
 779   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 780 
 781   // Allocation
 782   static Handle create(TRAPS);
 783 
 784   // Accessors
 785   static oop clazz(oop reflect);
 786   static void set_clazz(oop reflect, oop value);
 787 
 788   static oop name(oop field);
 789   static void set_name(oop field, oop value);
 790 
 791   static oop type(oop field);
 792   static void set_type(oop field, oop value);
 793 
 794   static int slot(oop reflect);
 795   static void set_slot(oop reflect, int value);
 796 
 797   static int modifiers(oop field);
 798   static void set_modifiers(oop field, int value);
 799 
 800   static void set_trusted_final(oop field);
 801 
 802   static void set_signature(oop constructor, oop value);
 803   static void set_annotations(oop constructor, oop value);
 804 
 805   // Debugging
 806   friend class JavaClasses;
 807 };
 808 
 809 class java_lang_reflect_Parameter {
 810  private:
 811   // Note that to reduce dependencies on the JDK we compute these
 812   // offsets at run-time.
 813   static int _name_offset;
 814   static int _modifiers_offset;
 815   static int _index_offset;
 816   static int _executable_offset;
 817 
 818   static void compute_offsets();
 819 
 820  public:
 821   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 822 
 823   // Allocation
 824   static Handle create(TRAPS);
 825 
 826   // Accessors
 827   static oop name(oop field);
 828   static void set_name(oop field, oop value);
 829 
 830   static int index(oop reflect);
 831   static void set_index(oop reflect, int value);
 832 
 833   static int modifiers(oop reflect);
 834   static void set_modifiers(oop reflect, int value);
 835 
 836   static oop executable(oop constructor);
 837   static void set_executable(oop constructor, oop value);
 838 
 839   friend class JavaClasses;
 840 };
 841 
 842 #define MODULE_INJECTED_FIELDS(macro)                            \
 843   macro(java_lang_Module, module_entry, intptr_signature, false)
 844 
 845 class java_lang_Module {
 846   private:
 847     static int _loader_offset;
 848     static int _name_offset;
 849     static int _module_entry_offset;
 850 
 851     static void compute_offsets();
 852 
 853   public:
 854     static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 855 
 856     // Allocation
 857     static Handle create(Handle loader, Handle module_name, TRAPS);
 858 
 859     // Testers
 860     static bool is_instance(oop obj);
 861 
 862     // Accessors
 863     static oop loader(oop module);
 864     static void set_loader(oop module, oop value);
 865 
 866     // CDS
 867     static int module_entry_offset() { return _module_entry_offset; }
 868 
 869     static oop name(oop module);
 870     static void set_name(oop module, oop value);
 871 
 872     static ModuleEntry* module_entry(oop module);
 873     static ModuleEntry* module_entry_raw(oop module);
 874     static void set_module_entry(oop module, ModuleEntry* module_entry);
 875 
 876   friend class JavaClasses;
 877 };
 878 
 879 // Interface to jdk.internal.reflect.ConstantPool objects
 880 class reflect_ConstantPool {
 881  private:
 882   // Note that to reduce dependencies on the JDK we compute these
 883   // offsets at run-time.
 884   static int _oop_offset;
 885 
 886   static void compute_offsets();
 887 
 888  public:
 889   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 890 
 891   // Allocation
 892   static Handle create(TRAPS);
 893 
 894   // Accessors
 895   static void set_cp(oop reflect, ConstantPool* value);
 896   static int oop_offset() { CHECK_INIT(_oop_offset); }
 897 
 898   static ConstantPool* get_cp(oop reflect);
 899 
 900   // Debugging
 901   friend class JavaClasses;
 902 };
 903 
 904 
 905 // Interface to java.lang primitive type boxing objects:
 906 //  - java.lang.Boolean
 907 //  - java.lang.Character
 908 //  - java.lang.Float
 909 //  - java.lang.Double
 910 //  - java.lang.Byte
 911 //  - java.lang.Short
 912 //  - java.lang.Integer
 913 //  - java.lang.Long
 914 
 915 // This could be separated out into 8 individual classes.
 916 
 917 class java_lang_boxing_object: AllStatic {
 918  private:
 919   static int _value_offset;
 920   static int _long_value_offset;
 921 
 922   static void compute_offsets();
 923   static oop initialize_and_allocate(BasicType type, TRAPS);
 924  public:
 925   // Allocation. Returns a boxed value, or null for invalid type.
 926   static oop create(BasicType type, jvalue* value, TRAPS);
 927   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 928   static BasicType get_value(oop box, jvalue* value);
 929   static BasicType set_value(oop box, jvalue* value);
 930   static BasicType basic_type(oop box);
 931   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 932   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 933   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 934   static void print(BasicType type, jvalue* value, outputStream* st);
 935 
 936   static int value_offset(BasicType type) {
 937     return is_double_word_type(type) ? _long_value_offset : _value_offset;
 938   }
 939 
 940   static void serialize_offsets(SerializeClosure* f);
 941 
 942   // Debugging
 943   friend class JavaClasses;
 944 };
 945 
 946 
 947 
 948 // Interface to java.lang.ref.Reference objects
 949 
 950 class java_lang_ref_Reference: AllStatic {
 951   static int _referent_offset;
 952   static int _queue_offset;
 953   static int _next_offset;
 954   static int _discovered_offset;
 955 
 956   static bool _offsets_initialized;
 957 
 958  public:
 959   // Accessors
 960   static inline oop weak_referent_no_keepalive(oop ref);
 961   static inline oop weak_referent(oop ref);
 962   static inline oop phantom_referent_no_keepalive(oop ref);
 963   static inline oop unknown_referent_no_keepalive(oop ref);
 964   static inline void clear_referent(oop ref);
 965   static inline void clear_referent_raw(oop ref);
 966   static inline HeapWord* referent_addr_raw(oop ref);
 967   static inline oop next(oop ref);
 968   static inline void set_next(oop ref, oop value);
 969   static inline void set_next_raw(oop ref, oop value);
 970   static inline HeapWord* next_addr_raw(oop ref);
 971   static inline oop discovered(oop ref);
 972   static inline void set_discovered(oop ref, oop value);
 973   static inline void set_discovered_raw(oop ref, oop value);
 974   static inline HeapWord* discovered_addr_raw(oop ref);
 975   static bool is_referent_field(oop obj, ptrdiff_t offset);
 976   static inline bool is_final(oop ref);
 977   static inline bool is_phantom(oop ref);
 978   static inline bool is_weak(oop ref);
 979   static inline bool is_soft(oop ref);
 980 
 981   static int referent_offset()    { CHECK_INIT(_referent_offset); }
 982   static int queue_offset()       { CHECK_INIT(_queue_offset); }
 983   static int next_offset()        { CHECK_INIT(_next_offset); }
 984   static int discovered_offset()  { CHECK_INIT(_discovered_offset); }
 985 
 986   static void compute_offsets();
 987   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 988 };
 989 
 990 
 991 // Interface to java.lang.ref.SoftReference objects
 992 
 993 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 994   static int _timestamp_offset;
 995   static int _static_clock_offset;
 996 
 997  public:
 998   // Accessors
 999   static jlong timestamp(oop ref);
1000 
1001   // Accessors for statics
1002   static jlong clock();
1003   static void set_clock(jlong value);
1004 
1005   static void compute_offsets();
1006   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1007 };
1008 
1009 // Interface to java.lang.invoke.MethodHandle objects
1010 
1011 class java_lang_invoke_MethodHandle: AllStatic {
1012   friend class JavaClasses;
1013 
1014  private:
1015   static int _type_offset;               // the MethodType of this MH
1016   static int _form_offset;               // the LambdaForm of this MH
1017 
1018   static void compute_offsets();
1019 
1020  public:
1021   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1022 
1023   // Accessors
1024   static oop            type(oop mh);
1025   static void       set_type(oop mh, oop mtype);
1026 
1027   static oop            form(oop mh);
1028   static void       set_form(oop mh, oop lform);
1029 
1030   // Testers
1031   static bool is_subclass(Klass* klass) {
1032     return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1033   }
1034   static bool is_instance(oop obj);
1035 
1036   // Accessors for code generation:
1037   static int type_offset()             { CHECK_INIT(_type_offset); }
1038   static int form_offset()             { CHECK_INIT(_form_offset); }
1039 };
1040 
1041 // Interface to java.lang.invoke.DirectMethodHandle objects
1042 
1043 class java_lang_invoke_DirectMethodHandle: AllStatic {
1044   friend class JavaClasses;
1045 
1046  private:
1047   static int _member_offset;               // the MemberName of this DMH
1048 
1049   static void compute_offsets();
1050 
1051  public:
1052   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1053 
1054   // Accessors
1055   static oop  member(oop mh);
1056 
1057   // Testers
1058   static bool is_subclass(Klass* klass) {
1059     return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1060   }
1061   static bool is_instance(oop obj);
1062 
1063   // Accessors for code generation:
1064   static int member_offset()           { CHECK_INIT(_member_offset); }
1065 };
1066 
1067 // Interface to java.lang.invoke.LambdaForm objects
1068 // (These are a private interface for managing adapter code generation.)
1069 
1070 class java_lang_invoke_LambdaForm: AllStatic {
1071   friend class JavaClasses;
1072 
1073  private:
1074   static int _vmentry_offset;  // type is MemberName
1075 
1076   static void compute_offsets();
1077 
1078  public:
1079   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1080 
1081   // Accessors
1082   static oop            vmentry(oop lform);
1083 
1084   // Testers
1085   static bool is_subclass(Klass* klass) {
1086     return vmClasses::LambdaForm_klass() != nullptr &&
1087       klass->is_subclass_of(vmClasses::LambdaForm_klass());
1088   }
1089   static bool is_instance(oop obj);
1090 
1091   // Accessors for code generation:
1092   static int vmentry_offset()          { CHECK_INIT(_vmentry_offset); }
1093 };
1094 
1095 // Interface to java.lang.invoke.NativeEntryPoint objects
1096 // (These are a private interface for managing adapter code generation.)
1097 
1098 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1099   friend class JavaClasses;
1100 
1101  private:
1102   static int _method_type_offset;
1103   static int _downcall_stub_address_offset;
1104 
1105   static void compute_offsets();
1106 
1107  public:
1108   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1109 
1110   // Accessors
1111   static oop        method_type(oop entry);
1112   static jlong      downcall_stub_address(oop entry);
1113 
1114   // Testers
1115   static bool is_subclass(Klass* klass) {
1116     return vmClasses::NativeEntryPoint_klass() != nullptr &&
1117       klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1118   }
1119   static bool is_instance(oop obj);
1120 
1121   // Accessors for code generation:
1122   static int method_type_offset_in_bytes()           { return _method_type_offset; }
1123   static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1124 };
1125 
1126 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1127   friend class JavaClasses;
1128 
1129  private:
1130   static int _inputStorage_offset;
1131   static int _outputStorage_offset;
1132   static int _volatileStorage_offset;
1133   static int _stackAlignment_offset;
1134   static int _shadowSpace_offset;
1135   static int _scratch1_offset;
1136   static int _scratch2_offset;
1137 
1138   static void compute_offsets();
1139 
1140  public:
1141   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1142 
1143   // Accessors
1144   static objArrayOop inputStorage(oop entry);
1145   static objArrayOop outputStorage(oop entry);
1146   static objArrayOop volatileStorage(oop entry);
1147   static jint        stackAlignment(oop entry);
1148   static jint        shadowSpace(oop entry);
1149   static oop         scratch1(oop entry);
1150   static oop         scratch2(oop entry);
1151 
1152   // Testers
1153   static bool is_subclass(Klass* klass) {
1154     return vmClasses::ABIDescriptor_klass() != nullptr &&
1155       klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1156   }
1157   static bool is_instance(oop obj);
1158 };
1159 
1160 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1161   friend class JavaClasses;
1162 
1163  private:
1164   static int _type_offset;
1165   static int _indexOrOffset_offset;
1166   static int _segmentMaskOrSize_offset;
1167   static int _debugName_offset;
1168 
1169   static void compute_offsets();
1170 
1171  public:
1172   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1173 
1174   // Accessors
1175   static jbyte  type(oop entry);
1176   static jint   index_or_offset(oop entry);
1177   static jshort segment_mask_or_size(oop entry);
1178   static oop    debugName(oop entry);
1179 
1180   // Testers
1181   static bool is_subclass(Klass* klass) {
1182     return vmClasses::VMStorage_klass() != nullptr &&
1183       klass->is_subclass_of(vmClasses::VMStorage_klass());
1184   }
1185   static bool is_instance(oop obj);
1186 };
1187 
1188 class jdk_internal_foreign_abi_CallConv: AllStatic {
1189   friend class JavaClasses;
1190 
1191  private:
1192   static int _argRegs_offset;
1193   static int _retRegs_offset;
1194 
1195   static void compute_offsets();
1196 
1197  public:
1198   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1199 
1200   // Accessors
1201   static objArrayOop argRegs(oop entry);
1202   static objArrayOop retRegs(oop entry);
1203 
1204   // Testers
1205   static bool is_subclass(Klass* klass) {
1206     return vmClasses::CallConv_klass() != nullptr &&
1207       klass->is_subclass_of(vmClasses::CallConv_klass());
1208   }
1209   static bool is_instance(oop obj);
1210 };
1211 
1212 // Interface to java.lang.invoke.MemberName objects
1213 // (These are a private interface for Java code to query the class hierarchy.)
1214 
1215 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \
1216   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1217 
1218 class java_lang_invoke_ResolvedMethodName : AllStatic {
1219   friend class JavaClasses;
1220 
1221   static int _vmtarget_offset;
1222   static int _vmholder_offset;
1223 
1224   static void compute_offsets();
1225  public:
1226   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1227 
1228   static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1229 
1230   static Method* vmtarget(oop resolved_method);
1231   static void set_vmtarget(oop resolved_method, Method* method);
1232 
1233   static void set_vmholder(oop resolved_method, oop holder);
1234 
1235   // find or create resolved member name
1236   static oop find_resolved_method(const methodHandle& m, TRAPS);
1237 
1238   static bool is_instance(oop resolved_method);
1239 };
1240 
1241 
1242 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1243   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)
1244 
1245 
1246 class java_lang_invoke_MemberName: AllStatic {
1247   friend class JavaClasses;
1248 
1249  private:
1250   // From java.lang.invoke.MemberName:
1251   //    private Class<?>   clazz;       // class in which the method is defined
1252   //    private String     name;        // may be null if not yet materialized
1253   //    private Object     type;        // may be null if not yet materialized
1254   //    private int        flags;       // modifier bits; see reflect.Modifier
1255   //    private ResolvedMethodName method;    // holds VM-specific target value
1256   //    private intptr_t   vmindex;     // member index within class or interface
1257   static int _clazz_offset;
1258   static int _name_offset;
1259   static int _type_offset;
1260   static int _flags_offset;
1261   static int _method_offset;
1262   static int _vmindex_offset;
1263 
1264   static void compute_offsets();
1265 
1266  public:
1267   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1268   // Accessors
1269   static oop            clazz(oop mname);
1270   static void       set_clazz(oop mname, oop clazz);
1271 
1272   static oop            type(oop mname);
1273   static void       set_type(oop mname, oop type);
1274 
1275   static oop            name(oop mname);
1276   static void       set_name(oop mname, oop name);
1277 
1278   static int            flags(oop mname);
1279   static void       set_flags(oop mname, int flags);
1280 
1281   // Link through ResolvedMethodName field to get Method*
1282   static Method*        vmtarget(oop mname);
1283   static void       set_method(oop mname, oop method);
1284 
1285   static intptr_t       vmindex(oop mname);
1286   static void       set_vmindex(oop mname, intptr_t index);
1287 
1288   // Testers
1289   static bool is_subclass(Klass* klass) {
1290     return klass->is_subclass_of(vmClasses::MemberName_klass());
1291   }
1292   static bool is_instance(oop obj);
1293 
1294   static bool is_method(oop obj);
1295 
1296   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1297   enum {
1298     MN_IS_METHOD             = 0x00010000, // method (not constructor)
1299     MN_IS_CONSTRUCTOR        = 0x00020000, // constructor
1300     MN_IS_FIELD              = 0x00040000, // field
1301     MN_IS_TYPE               = 0x00080000, // nested type
1302     MN_CALLER_SENSITIVE      = 0x00100000, // @CallerSensitive annotation detected
1303     MN_TRUSTED_FINAL         = 0x00200000, // trusted final field
1304     MN_HIDDEN_MEMBER         = 0x00400000, // @Hidden annotation detected
1305     MN_REFERENCE_KIND_SHIFT  = 24, // refKind
1306     MN_REFERENCE_KIND_MASK   = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1307     MN_NESTMATE_CLASS        = 0x00000001,
1308     MN_HIDDEN_CLASS          = 0x00000002,
1309     MN_STRONG_LOADER_LINK    = 0x00000004,
1310     MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1311     // Lookup modes
1312     MN_MODULE_MODE           = 0x00000010,
1313     MN_UNCONDITIONAL_MODE    = 0x00000020,
1314     MN_TRUSTED_MODE          = -1
1315   };
1316 
1317   // Accessors for code generation:
1318   static int clazz_offset()   { CHECK_INIT(_clazz_offset); }
1319   static int type_offset()    { CHECK_INIT(_type_offset); }
1320   static int flags_offset()   { CHECK_INIT(_flags_offset); }
1321   static int method_offset()  { CHECK_INIT(_method_offset); }
1322   static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1323 };
1324 
1325 
1326 // Interface to java.lang.invoke.MethodType objects
1327 
1328 class java_lang_invoke_MethodType: AllStatic {
1329   friend class JavaClasses;
1330 
1331  private:
1332   static int _rtype_offset;
1333   static int _ptypes_offset;
1334 
1335   static void compute_offsets();
1336 
1337  public:
1338   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1339   // Accessors
1340   static oop            rtype(oop mt);
1341   static objArrayOop    ptypes(oop mt);
1342 
1343   static oop            ptype(oop mt, int index);
1344   static int            ptype_count(oop mt);
1345 
1346   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1347   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1348 
1349   static Symbol*        as_signature(oop mt, bool intern_if_not_found);
1350   static void           print_signature(oop mt, outputStream* st);
1351 
1352   static bool is_instance(oop obj);
1353 
1354   static bool equals(oop mt1, oop mt2);
1355 
1356   // Accessors for code generation:
1357   static int rtype_offset()  { CHECK_INIT(_rtype_offset); }
1358   static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1359 };
1360 
1361 
1362 // Interface to java.lang.invoke.CallSite objects
1363 
1364 class java_lang_invoke_CallSite: AllStatic {
1365   friend class JavaClasses;
1366 
1367 private:
1368   static int _target_offset;
1369   static int _context_offset;
1370 
1371   static void compute_offsets();
1372 
1373 public:
1374   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1375   // Accessors
1376   static oop              target(          oop site);
1377   static void         set_target(          oop site, oop target);
1378   static void         set_target_volatile( oop site, oop target);
1379 
1380   static oop context_no_keepalive(oop site);
1381 
1382   // Testers
1383   static bool is_subclass(Klass* klass) {
1384     return klass->is_subclass_of(vmClasses::CallSite_klass());
1385   }
1386   static bool is_instance(oop obj);
1387 
1388   // Accessors for code generation:
1389   static int target_offset()  { CHECK_INIT(_target_offset); }
1390   static int context_offset() { CHECK_INIT(_context_offset); }
1391 };
1392 
1393 // Interface to java.lang.invoke.ConstantCallSite objects
1394 
1395 class java_lang_invoke_ConstantCallSite: AllStatic {
1396   friend class JavaClasses;
1397 
1398 private:
1399   static int _is_frozen_offset;
1400 
1401   static void compute_offsets();
1402 
1403 public:
1404   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1405   // Accessors
1406   static jboolean is_frozen(oop site);
1407 
1408   // Testers
1409   static bool is_subclass(Klass* klass) {
1410     return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1411   }
1412   static bool is_instance(oop obj);
1413 };
1414 
1415 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1416 
1417 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1418   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) \
1419   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, last_cleanup, long_signature, false)
1420 
1421 class DependencyContext;
1422 
1423 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1424   friend class JavaClasses;
1425 
1426 private:
1427   static int _vmdependencies_offset;
1428   static int _last_cleanup_offset;
1429 
1430   static void compute_offsets();
1431 
1432 public:
1433   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1434   // Accessors
1435   static DependencyContext vmdependencies(oop context);
1436 
1437   // Testers
1438   static bool is_subclass(Klass* klass) {
1439     return klass->is_subclass_of(vmClasses::Context_klass());
1440   }
1441   static bool is_instance(oop obj);
1442 };
1443 
1444 // Interface to java.security.AccessControlContext objects
1445 
1446 class java_security_AccessControlContext: AllStatic {
1447  private:
1448   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1449   // so we compute the offsets at startup rather than hard-wiring them.
1450   static int _context_offset;
1451   static int _privilegedContext_offset;
1452   static int _isPrivileged_offset;
1453   static int _isAuthorized_offset;
1454 
1455   static void compute_offsets();
1456  public:
1457   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1458   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1459 
1460   // Debugging/initialization
1461   friend class JavaClasses;
1462 };
1463 
1464 
1465 // Interface to java.lang.ClassLoader objects
1466 
1467 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1468   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1469 
1470 class java_lang_ClassLoader : AllStatic {
1471  private:
1472   static int _loader_data_offset;
1473   static int _parent_offset;
1474   static int _parallelCapable_offset;
1475   static int _name_offset;
1476   static int _nameAndId_offset;
1477   static int _unnamedModule_offset;
1478 
1479   static void compute_offsets();
1480 
1481  public:
1482   // Support for CDS
1483   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1484   static int loader_data_offset() { return  _loader_data_offset; }
1485 
1486   static ClassLoaderData* loader_data_acquire(oop loader);
1487   static ClassLoaderData* loader_data(oop loader);
1488   static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1489 
1490   static oop parent(oop loader);
1491   static oop parent_no_keepalive(oop loader);
1492   static oop name(oop loader);
1493   static oop nameAndId(oop loader);
1494   static bool isAncestor(oop loader, oop cl);
1495 
1496   // Support for parallelCapable field
1497   static bool parallelCapable(oop the_class_mirror);
1498 
1499   static bool is_trusted_loader(oop loader);
1500 
1501   // Return true if this is one of the class loaders associated with
1502   // the generated bytecodes for serialization constructor returned
1503   // by sun.reflect.ReflectionFactory::newConstructorForSerialization
1504   static bool is_reflection_class_loader(oop loader);
1505 
1506   // Fix for 4474172
1507   static oop  non_reflection_class_loader(oop loader);
1508 
1509   // Testers
1510   static bool is_subclass(Klass* klass) {
1511     return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1512   }
1513   static bool is_instance(oop obj);
1514 
1515   static oop unnamedModule(oop loader);
1516 
1517   // Debugging
1518   friend class JavaClasses;
1519 };
1520 
1521 
1522 // Interface to java.lang.System objects
1523 
1524 class java_lang_System : AllStatic {
1525  private:
1526   static int _static_in_offset;
1527   static int _static_out_offset;
1528   static int _static_err_offset;
1529   static int _static_security_offset;
1530   static int _static_allow_security_offset;
1531   static int _static_never_offset;
1532 
1533  public:
1534   static int  in_offset() { CHECK_INIT(_static_in_offset); }
1535   static int out_offset() { CHECK_INIT(_static_out_offset); }
1536   static int err_offset() { CHECK_INIT(_static_err_offset); }
1537   static bool allow_security_manager();
1538   static bool has_security_manager();
1539 
1540   static void compute_offsets();
1541   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1542 
1543   // Debugging
1544   friend class JavaClasses;
1545 };
1546 
1547 
1548 // Interface to java.lang.StackTraceElement objects
1549 
1550 class java_lang_StackTraceElement: AllStatic {
1551  private:
1552   static int _declaringClassObject_offset;
1553   static int _classLoaderName_offset;
1554   static int _moduleName_offset;
1555   static int _moduleVersion_offset;
1556   static int _declaringClass_offset;
1557   static int _methodName_offset;
1558   static int _fileName_offset;
1559   static int _lineNumber_offset;
1560 
1561   // Setters
1562   static void set_classLoaderName(oop element, oop value);
1563   static void set_moduleName(oop element, oop value);
1564   static void set_moduleVersion(oop element, oop value);
1565   static void set_declaringClass(oop element, oop value);
1566   static void set_methodName(oop element, oop value);
1567   static void set_fileName(oop element, oop value);
1568   static void set_lineNumber(oop element, int value);
1569   static void set_declaringClassObject(oop element, oop value);
1570 
1571   static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1572                                    const methodHandle& method, int bci,
1573                                    Symbol*& source, oop& source_file, int& line_number, TRAPS);
1574 
1575  public:
1576   // Create an instance of StackTraceElement
1577   static oop create(const methodHandle& method, int bci, TRAPS);
1578 
1579   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1580                       int version, int bci, Symbol* name, TRAPS);
1581 
1582   static void compute_offsets();
1583   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1584 
1585 #if INCLUDE_JVMCI
1586   static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1587 #endif
1588 
1589   // Debugging
1590   friend class JavaClasses;
1591 };
1592 
1593 
1594 class Backtrace: AllStatic {
1595  public:
1596   // Helper backtrace functions to store bci|version together.
1597   static int merge_bci_and_version(int bci, int version);
1598   static int merge_mid_and_cpref(int mid, int cpref);
1599   static int bci_at(unsigned int merged);
1600   static int version_at(unsigned int merged);
1601   static int mid_at(unsigned int merged);
1602   static int cpref_at(unsigned int merged);
1603   static int get_line_number(Method* method, int bci);
1604   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1605 
1606   // Debugging
1607   friend class JavaClasses;
1608 };
1609 
1610 class java_lang_ClassFrameInfo: AllStatic {
1611 private:
1612   static int _classOrMemberName_offset;
1613   static int _flags_offset;
1614 
1615 public:
1616   static oop  classOrMemberName(oop info);
1617   static int  flags(oop info);
1618 
1619   // Setters
1620   static void init_class(Handle stackFrame, const methodHandle& m);
1621   static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1622 
1623   static void compute_offsets();
1624   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1625 
1626   // Debugging
1627   friend class JavaClasses;
1628 };
1629 
1630 // Interface to java.lang.StackFrameInfo objects
1631 
1632 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1633   macro(java_lang_StackFrameInfo, version, short_signature, false)
1634 
1635 class java_lang_StackFrameInfo: AllStatic {
1636 private:
1637   static int _type_offset;
1638   static int _name_offset;
1639   static int _bci_offset;
1640   static int _version_offset;
1641   static int _contScope_offset;
1642 
1643 public:
1644   // Getters
1645   static oop name(oop info);
1646   static oop type(oop info);
1647   static Method* get_method(oop info);
1648 
1649   // Setters
1650   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1651   static void set_name(oop info, oop value);
1652   static void set_type(oop info, oop value);
1653   static void set_bci(oop info, int value);
1654 
1655   static void set_version(oop info, short value);
1656   static void set_contScope(oop info, oop value);
1657 
1658   static void compute_offsets();
1659   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1660 
1661   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1662 
1663   // Debugging
1664   friend class JavaClasses;
1665 };
1666 
1667 class java_lang_LiveStackFrameInfo: AllStatic {
1668  private:
1669   static int _monitors_offset;
1670   static int _locals_offset;
1671   static int _operands_offset;
1672   static int _mode_offset;
1673 
1674  public:
1675   static void set_monitors(oop info, oop value);
1676   static void set_locals(oop info, oop value);
1677   static void set_operands(oop info, oop value);
1678   static void set_mode(oop info, int value);
1679 
1680   static void compute_offsets();
1681   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1682 
1683   // Debugging
1684   friend class JavaClasses;
1685 };
1686 
1687 // Interface to java.lang.reflect.RecordComponent objects
1688 
1689 class java_lang_reflect_RecordComponent: AllStatic {
1690  private:
1691   static int _clazz_offset;
1692   static int _name_offset;
1693   static int _type_offset;
1694   static int _accessor_offset;
1695   static int _signature_offset;
1696   static int _annotations_offset;
1697   static int _typeAnnotations_offset;
1698 
1699   // Setters
1700   static void set_clazz(oop element, oop value);
1701   static void set_name(oop element, oop value);
1702   static void set_type(oop element, oop value);
1703   static void set_accessor(oop element, oop value);
1704   static void set_signature(oop element, oop value);
1705   static void set_annotations(oop element, oop value);
1706   static void set_typeAnnotations(oop element, oop value);
1707 
1708  public:
1709   // Create an instance of RecordComponent
1710   static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1711 
1712   static void compute_offsets();
1713   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1714 
1715   // Debugging
1716   friend class JavaClasses;
1717 };
1718 
1719 
1720 // Interface to java.lang.AssertionStatusDirectives objects
1721 
1722 class java_lang_AssertionStatusDirectives: AllStatic {
1723  private:
1724   static int _classes_offset;
1725   static int _classEnabled_offset;
1726   static int _packages_offset;
1727   static int _packageEnabled_offset;
1728   static int _deflt_offset;
1729 
1730  public:
1731   // Setters
1732   static void set_classes(oop obj, oop val);
1733   static void set_classEnabled(oop obj, oop val);
1734   static void set_packages(oop obj, oop val);
1735   static void set_packageEnabled(oop obj, oop val);
1736   static void set_deflt(oop obj, bool val);
1737 
1738   static void compute_offsets();
1739   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1740 
1741   // Debugging
1742   friend class JavaClasses;
1743 };
1744 
1745 
1746 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1747  private:
1748   static int  _owner_offset;
1749  public:
1750   static void compute_offsets();
1751   static oop  get_owner_threadObj(oop obj);
1752   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1753 };
1754 
1755  // Interface to jdk.internal.misc.UnsafeConsants
1756 
1757 class jdk_internal_misc_UnsafeConstants : AllStatic {
1758  public:
1759   static void set_unsafe_constants();
1760   static void compute_offsets() { }
1761   static void serialize_offsets(SerializeClosure* f) { }
1762 };
1763 
1764 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1765 
1766 class vector_VectorPayload : AllStatic {
1767  private:
1768   static int _payload_offset;
1769  public:
1770   static void set_payload(oop o, oop val);
1771 
1772   static void compute_offsets();
1773   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1774 
1775   // Testers
1776   static bool is_subclass(Klass* klass) {
1777     return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1778   }
1779   static bool is_instance(oop obj);
1780 };
1781 
1782 class java_lang_Integer : AllStatic {
1783 public:
1784   static jint value(oop obj);
1785 };
1786 
1787 class java_lang_Long : AllStatic {
1788 public:
1789   static jlong value(oop obj);
1790 };
1791 
1792 class java_lang_Character : AllStatic {
1793 public:
1794   static jchar value(oop obj);
1795 };
1796 
1797 class java_lang_Short : AllStatic {
1798 public:
1799   static jshort value(oop obj);
1800 };
1801 
1802 class java_lang_Byte : AllStatic {
1803 public:
1804   static jbyte value(oop obj);
1805 };
1806 
1807 class java_lang_Boolean : AllStatic {
1808  private:
1809   static int _static_TRUE_offset;
1810   static int _static_FALSE_offset;
1811  public:
1812   static Symbol* symbol();
1813   static void compute_offsets(InstanceKlass* k);
1814   static oop  get_TRUE(InstanceKlass *k);
1815   static oop  get_FALSE(InstanceKlass *k);
1816   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1817   static jboolean value(oop obj);
1818 };
1819 
1820 class java_lang_Integer_IntegerCache : AllStatic {
1821  private:
1822   static int _static_cache_offset;
1823  public:
1824   static Symbol* symbol();
1825   static void compute_offsets(InstanceKlass* k);
1826   static objArrayOop  cache(InstanceKlass *k);
1827   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1828 };
1829 
1830 class java_lang_Long_LongCache : AllStatic {
1831  private:
1832   static int _static_cache_offset;
1833  public:
1834   static Symbol* symbol();
1835   static void compute_offsets(InstanceKlass* k);
1836   static objArrayOop  cache(InstanceKlass *k);
1837   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1838 };
1839 
1840 class java_lang_Character_CharacterCache : AllStatic {
1841  private:
1842   static int _static_cache_offset;
1843  public:
1844   static Symbol* symbol();
1845   static void compute_offsets(InstanceKlass* k);
1846   static objArrayOop  cache(InstanceKlass *k);
1847   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1848 };
1849 
1850 class java_lang_Short_ShortCache : AllStatic {
1851  private:
1852   static int _static_cache_offset;
1853  public:
1854   static Symbol* symbol();
1855   static void compute_offsets(InstanceKlass* k);
1856   static objArrayOop  cache(InstanceKlass *k);
1857   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1858 };
1859 
1860 class java_lang_Byte_ByteCache : AllStatic {
1861  private:
1862   static int _static_cache_offset;
1863  public:
1864   static Symbol* symbol();
1865   static void compute_offsets(InstanceKlass* k);
1866   static objArrayOop  cache(InstanceKlass *k);
1867   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1868 };
1869 
1870 
1871 // Interface to java.lang.InternalError objects
1872 
1873 #define INTERNALERROR_INJECTED_FIELDS(macro)                      \
1874   macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1875 
1876 class java_lang_InternalError : AllStatic {
1877  private:
1878   static int _during_unsafe_access_offset;
1879  public:
1880   static jboolean during_unsafe_access(oop internal_error);
1881   static void set_during_unsafe_access(oop internal_error);
1882   static void compute_offsets();
1883   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1884 };
1885 
1886 // Use to declare fields that need to be injected into Java classes
1887 // for the JVM to use.  The name_index and signature_index are
1888 // declared in vmSymbols.  The may_be_java flag is used to declare
1889 // fields that might already exist in Java but should be injected if
1890 // they don't.  Otherwise the field is unconditionally injected and
1891 // the JVM uses the injected one.  This is to ensure that name
1892 // collisions don't occur.  In general may_be_java should be false
1893 // unless there's a good reason.
1894 
1895 class InjectedField {
1896  public:
1897   const vmClassID klass_id;
1898   const vmSymbolID name_index;
1899   const vmSymbolID signature_index;
1900   const bool           may_be_java;
1901 
1902 
1903   Klass* klass() const      { return vmClasses::klass_at(klass_id); }
1904   Symbol* name() const      { return lookup_symbol(name_index); }
1905   Symbol* signature() const { return lookup_symbol(signature_index); }
1906 
1907   int compute_offset();
1908 
1909   // Find the Symbol for this index
1910   static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1911     return Symbol::vm_symbol_at(symbol_index);
1912   }
1913 };
1914 
1915 
1916 // Interface to hard-coded offset checking
1917 
1918 enum class InjectedFieldID : int;
1919 
1920 class JavaClasses : AllStatic {
1921  private:
1922 
1923   static InjectedField _injected_fields[];
1924 
1925   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1926  public:
1927 
1928   static int compute_injected_offset(InjectedFieldID id);
1929 
1930   static void compute_offsets();
1931   static void check_offsets() PRODUCT_RETURN;
1932   static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1933   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1934   static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1935 
1936   static void compute_offset(int &dest_offset,
1937                              InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1938                              bool is_static = false);
1939   static void compute_offset(int& dest_offset, InstanceKlass* ik,
1940                              const char* name_string, Symbol* signature_symbol,
1941                              bool is_static = false);
1942 };
1943 
1944 #undef CHECK_INIT
1945 
1946 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP