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);
 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 _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 void set_signers(oop java_class, objArrayOop signers);
 304   static oop  class_data(oop java_class);
 305   static void set_class_data(oop java_class, oop classData);
 306 
 307   static int component_mirror_offset() { return _component_mirror_offset; }
 308 
 309   static oop class_loader(oop java_class);
 310   static void set_module(oop java_class, oop module);
 311   static oop module(oop java_class);
 312 
 313   static oop name(Handle java_class, TRAPS);
 314 
 315   static oop source_file(oop java_class);
 316   static void set_source_file(oop java_class, oop source_file);
 317 
 318   static size_t oop_size(oop java_class);
 319   static void set_oop_size(HeapWord* java_class, size_t size);
 320   static int static_oop_field_count(oop java_class);
 321   static void set_static_oop_field_count(oop java_class, int size);
 322 
 323   static GrowableArray<Klass*>* fixup_mirror_list() {
 324     return _fixup_mirror_list;
 325   }
 326   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 327     _fixup_mirror_list = v;
 328   }
 329 
 330   static GrowableArray<Klass*>* fixup_module_field_list() {
 331     return _fixup_module_field_list;
 332   }
 333   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 334     _fixup_module_field_list = v;
 335   }
 336 
 337   // Debugging
 338   friend class JavaClasses;
 339 };
 340 
 341 // Interface to java.lang.Thread objects
 342 
 343 #define THREAD_INJECTED_FIELDS(macro)                                  \
 344   macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \
 345   macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \
 346   macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \
 347   JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false))
 348 
 349 class java_lang_Thread : AllStatic {
 350   friend class java_lang_VirtualThread;
 351   friend class JVMCIVMStructs;
 352  private:
 353   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 354   // so we compute the offsets at startup rather than hard-wiring them.
 355   static int _holder_offset;
 356   static int _name_offset;
 357   static int _contextClassLoader_offset;
 358   static int _inheritedAccessControlContext_offset;
 359   static int _eetop_offset;
 360   static int _jvmti_thread_state_offset;
 361   static int _jvmti_VTMS_transition_disable_count_offset;
 362   static int _jvmti_is_in_VTMS_transition_offset;
 363   static int _interrupted_offset;
 364   static int _interruptLock_offset;
 365   static int _tid_offset;
 366   static int _continuation_offset;
 367   static int _park_blocker_offset;
 368   static int _scopedValueBindings_offset;
 369   JFR_ONLY(static int _jfr_epoch_offset;)
 370 
 371   static void compute_offsets();
 372 
 373  public:
 374   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 375 
 376   // Returns the JavaThread associated with the thread obj
 377   static JavaThread* thread(oop java_thread);
 378   static JavaThread* thread_acquire(oop java_thread);
 379   // Set JavaThread for instance
 380   static void set_thread(oop java_thread, JavaThread* thread);
 381   static void release_set_thread(oop java_thread, JavaThread* thread);
 382   // FieldHolder
 383   static oop holder(oop java_thread);
 384   // interruptLock
 385   static oop interrupt_lock(oop java_thread);
 386   // Interrupted status
 387   static bool interrupted(oop java_thread);
 388   static void set_interrupted(oop java_thread, bool val);
 389   // Name
 390   static oop name(oop java_thread);
 391   static void set_name(oop java_thread, oop name);
 392   // Priority
 393   static ThreadPriority priority(oop java_thread);
 394   static void set_priority(oop java_thread, ThreadPriority priority);
 395   // Thread group
 396   static oop  threadGroup(oop java_thread);
 397   // Alive (NOTE: this is not really a field, but provides the correct
 398   // definition without doing a Java call)
 399   static bool is_alive(oop java_thread);
 400   // Daemon
 401   static bool is_daemon(oop java_thread);
 402   static void set_daemon(oop java_thread);
 403   // Context ClassLoader
 404   static oop context_class_loader(oop java_thread);
 405   // Control context
 406   static oop inherited_access_control_context(oop java_thread);
 407   // Stack size hint
 408   static jlong stackSize(oop java_thread);
 409   // Thread ID
 410   static int64_t thread_id(oop java_thread);
 411   static ByteSize thread_id_offset();
 412   // Continuation
 413   static inline oop continuation(oop java_thread);
 414 
 415   static JvmtiThreadState* jvmti_thread_state(oop java_thread);
 416   static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state);
 417   static int  VTMS_transition_disable_count(oop java_thread);
 418   static void inc_VTMS_transition_disable_count(oop java_thread);
 419   static void dec_VTMS_transition_disable_count(oop java_thread);
 420   static bool is_in_VTMS_transition(oop java_thread);
 421   static void set_is_in_VTMS_transition(oop java_thread, bool val);
 422   static int  is_in_VTMS_transition_offset();
 423 
 424   // Clear all scoped value bindings on error
 425   static void clear_scopedValueBindings(oop java_thread);
 426 
 427   // Blocker object responsible for thread parking
 428   static oop park_blocker(oop java_thread);
 429 
 430   // Write thread status info to threadStatus field of java.lang.Thread.
 431   static void set_thread_status(oop java_thread_oop, JavaThreadStatus status);
 432   // Read thread status info from threadStatus field of java.lang.Thread.
 433   static JavaThreadStatus get_thread_status(oop java_thread_oop);
 434 
 435   static const char*  thread_status_name(oop java_thread_oop);
 436 
 437   // Fill in current stack trace, can cause GC
 438   static oop async_get_stack_trace(oop java_thread, TRAPS);
 439 
 440   JFR_ONLY(static u2 jfr_epoch(oop java_thread);)
 441   JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);)
 442   JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); })
 443 
 444   // Debugging
 445   friend class JavaClasses;
 446 };
 447 
 448 // Interface to java.lang.Thread$FieldHolder objects
 449 
 450 class java_lang_Thread_FieldHolder : AllStatic {
 451  private:
 452   static int _group_offset;
 453   static int _priority_offset;
 454   static int _stackSize_offset;
 455   static int _daemon_offset;
 456   static int _thread_status_offset;
 457 
 458   static void compute_offsets();
 459 
 460  public:
 461   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 462 
 463   static oop threadGroup(oop holder);
 464 
 465   static ThreadPriority priority(oop holder);
 466   static void set_priority(oop holder, ThreadPriority priority);
 467 
 468   static jlong stackSize(oop holder);
 469 
 470   static bool is_daemon(oop holder);
 471   static void set_daemon(oop holder, bool val);
 472 
 473   static void set_thread_status(oop holder, JavaThreadStatus status);
 474   static JavaThreadStatus get_thread_status(oop holder);
 475 
 476   friend class JavaClasses;
 477 };
 478 
 479 // Interface to java.lang.Thread$Constants objects
 480 
 481 class java_lang_Thread_Constants : AllStatic {
 482  private:
 483   static int _static_VTHREAD_GROUP_offset;
 484   static int _static_NOT_SUPPORTED_CLASSLOADER_offset;
 485 
 486   static void compute_offsets();
 487   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 488 
 489  public:
 490   static oop get_VTHREAD_GROUP();
 491 
 492   friend class JavaClasses;
 493 };
 494 
 495 // Interface to java.lang.ThreadGroup objects
 496 
 497 class java_lang_ThreadGroup : AllStatic {
 498  private:
 499   static int _parent_offset;
 500   static int _name_offset;
 501   static int _maxPriority_offset;
 502   static int _daemon_offset;
 503 
 504   static void compute_offsets();
 505  public:
 506   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 507 
 508   // parent ThreadGroup
 509   static oop parent(oop java_thread_group);
 510   // name
 511   static const char* name(oop java_thread_group);
 512   // maxPriority in group
 513   static ThreadPriority maxPriority(oop java_thread_group);
 514   // Daemon
 515   static bool is_daemon(oop java_thread_group);
 516 
 517   // Debugging
 518   friend class JavaClasses;
 519 };
 520 
 521 
 522 // Interface to java.lang.VirtualThread objects
 523 
 524 class java_lang_VirtualThread : AllStatic {
 525  private:
 526   static int static_vthread_scope_offset;
 527   static int _carrierThread_offset;
 528   static int _continuation_offset;
 529   static int _state_offset;
 530   JFR_ONLY(static int _jfr_epoch_offset;)
 531  public:
 532   enum {
 533     NEW           = 0,
 534     STARTED       = 1,
 535     RUNNING       = 2,
 536     PARKING       = 3,
 537     PARKED        = 4,
 538     PINNED        = 5,
 539     TIMED_PARKING = 6,
 540     TIMED_PARKED  = 7,
 541     TIMED_PINNED  = 8,
 542     UNPARKED      = 9,
 543     YIELDING      = 10,
 544     YIELDED       = 11,
 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 JavaThreadStatus map_state_to_thread_status(int state);
 565 };
 566 
 567 
 568 // Interface to java.lang.Throwable objects
 569 
 570 class java_lang_Throwable: AllStatic {
 571   friend class BacktraceBuilder;
 572   friend class BacktraceIterator;
 573 
 574  private:
 575   // Trace constants
 576   enum {
 577     trace_methods_offset = 0,
 578     trace_bcis_offset    = 1,
 579     trace_mirrors_offset = 2,
 580     trace_names_offset   = 3,
 581     trace_conts_offset   = 4,
 582     trace_next_offset    = 5,
 583     trace_hidden_offset  = 6,
 584     trace_size           = 7,
 585     trace_chunk_size     = 32
 586   };
 587 
 588   static int _backtrace_offset;
 589   static int _detailMessage_offset;
 590   static int _stackTrace_offset;
 591   static int _depth_offset;
 592   static int _cause_offset;
 593   static int _static_unassigned_stacktrace_offset;
 594 
 595   // StackTrace (programmatic access, new since 1.4)
 596   static void clear_stacktrace(oop throwable);
 597   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 598   static void set_stacktrace(oop throwable, oop st_element_array);
 599   static oop unassigned_stacktrace();
 600 
 601  public:
 602   // Backtrace
 603   static oop backtrace(oop throwable);
 604   static void set_backtrace(oop throwable, oop value);
 605   static int depth(oop throwable);
 606   static void set_depth(oop throwable, int value);
 607   // Message
 608   static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); }
 609   static oop message(oop throwable);
 610   static const char* message_as_utf8(oop throwable);
 611   static void set_message(oop throwable, oop value);
 612 
 613   static oop cause(oop throwable);
 614 
 615   static void print_stack_element(outputStream *st, Method* method, int bci);
 616 
 617   static void compute_offsets();
 618   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 619 
 620   // Allocate space for backtrace (created but stack trace not filled in)
 621   static void allocate_backtrace(Handle throwable, TRAPS);
 622   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 623   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 624   // Fill in current stack trace, can cause GC
 625   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 626   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 627 
 628   // Programmatic access to stack trace
 629   static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS);
 630 
 631   // For recreating class initialization error exceptions.
 632   static Handle create_initialization_error(JavaThread* current, Handle throwable);
 633 
 634   // Printing
 635   static void print(oop throwable, outputStream* st);
 636   static void print_stack_trace(Handle throwable, outputStream* st);
 637   static void java_printStackTrace(Handle throwable, TRAPS);
 638   // Debugging
 639   friend class JavaClasses;
 640   // Gets the method and bci of the top frame (TOS). Returns false if this failed.
 641   static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
 642 };
 643 
 644 
 645 // Interface to java.lang.reflect.AccessibleObject objects
 646 
 647 class java_lang_reflect_AccessibleObject: AllStatic {
 648  private:
 649   // Note that to reduce dependencies on the JDK we compute these
 650   // offsets at run-time.
 651   static int _override_offset;
 652 
 653   static void compute_offsets();
 654 
 655  public:
 656   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 657 
 658   // Accessors
 659   static jboolean override(oop reflect);
 660   static void set_override(oop reflect, jboolean value);
 661 
 662   // Debugging
 663   friend class JavaClasses;
 664 };
 665 
 666 
 667 // Interface to java.lang.reflect.Method objects
 668 
 669 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 670  private:
 671   // Note that to reduce dependencies on the JDK we compute these
 672   // offsets at run-time.
 673   static int _clazz_offset;
 674   static int _name_offset;
 675   static int _returnType_offset;
 676   static int _parameterTypes_offset;
 677   static int _exceptionTypes_offset;
 678   static int _slot_offset;
 679   static int _modifiers_offset;
 680   static int _signature_offset;
 681   static int _annotations_offset;
 682   static int _parameter_annotations_offset;
 683   static int _annotation_default_offset;
 684 
 685   static void compute_offsets();
 686  public:
 687   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 688 
 689   // Allocation
 690   static Handle create(TRAPS);
 691 
 692   // Accessors
 693   static oop clazz(oop reflect);
 694   static void set_clazz(oop reflect, oop value);
 695 
 696   static void set_name(oop method, oop value);
 697 
 698   static oop return_type(oop method);
 699   static void set_return_type(oop method, oop value);
 700 
 701   static oop parameter_types(oop method);
 702   static void set_parameter_types(oop method, oop value);
 703 
 704   static int slot(oop reflect);
 705   static void set_slot(oop reflect, int value);
 706 
 707   static void set_exception_types(oop method, oop value);
 708   static void set_modifiers(oop method, int value);
 709   static void set_signature(oop method, oop value);
 710   static void set_annotations(oop method, oop value);
 711   static void set_parameter_annotations(oop method, oop value);
 712   static void set_annotation_default(oop method, oop value);
 713 
 714   // Debugging
 715   friend class JavaClasses;
 716 };
 717 
 718 
 719 // Interface to java.lang.reflect.Constructor objects
 720 
 721 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 722  private:
 723   // Note that to reduce dependencies on the JDK we compute these
 724   // offsets at run-time.
 725   static int _clazz_offset;
 726   static int _parameterTypes_offset;
 727   static int _exceptionTypes_offset;
 728   static int _slot_offset;
 729   static int _modifiers_offset;
 730   static int _signature_offset;
 731   static int _annotations_offset;
 732   static int _parameter_annotations_offset;
 733 
 734   static void compute_offsets();
 735  public:
 736   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 737 
 738   // Allocation
 739   static Handle create(TRAPS);
 740 
 741   // Accessors
 742   static oop clazz(oop reflect);
 743   static void set_clazz(oop reflect, oop value);
 744 
 745   static oop parameter_types(oop constructor);
 746   static void set_parameter_types(oop constructor, oop value);
 747 
 748   static int slot(oop reflect);
 749   static void set_slot(oop reflect, int value);
 750 
 751   static void set_exception_types(oop constructor, oop value);
 752   static void set_modifiers(oop constructor, int value);
 753   static void set_signature(oop constructor, oop value);
 754   static void set_annotations(oop constructor, oop value);
 755   static void set_parameter_annotations(oop method, oop value);
 756 
 757   // Debugging
 758   friend class JavaClasses;
 759 };
 760 
 761 
 762 // Interface to java.lang.reflect.Field objects
 763 
 764 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 765  private:
 766   // Note that to reduce dependencies on the JDK we compute these
 767   // offsets at run-time.
 768   static int _clazz_offset;
 769   static int _name_offset;
 770   static int _type_offset;
 771   static int _slot_offset;
 772   static int _modifiers_offset;
 773   static int _trusted_final_offset;
 774   static int _signature_offset;
 775   static int _annotations_offset;
 776 
 777   static void compute_offsets();
 778 
 779  public:
 780   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 781 
 782   // Allocation
 783   static Handle create(TRAPS);
 784 
 785   // Accessors
 786   static oop clazz(oop reflect);
 787   static void set_clazz(oop reflect, oop value);
 788 
 789   static oop name(oop field);
 790   static void set_name(oop field, oop value);
 791 
 792   static oop type(oop field);
 793   static void set_type(oop field, oop value);
 794 
 795   static int slot(oop reflect);
 796   static void set_slot(oop reflect, int value);
 797 
 798   static int modifiers(oop field);
 799   static void set_modifiers(oop field, int value);
 800 
 801   static void set_trusted_final(oop field);
 802 
 803   static void set_signature(oop constructor, oop value);
 804   static void set_annotations(oop constructor, oop value);
 805 
 806   // Debugging
 807   friend class JavaClasses;
 808 };
 809 
 810 class java_lang_reflect_Parameter {
 811  private:
 812   // Note that to reduce dependencies on the JDK we compute these
 813   // offsets at run-time.
 814   static int _name_offset;
 815   static int _modifiers_offset;
 816   static int _index_offset;
 817   static int _executable_offset;
 818 
 819   static void compute_offsets();
 820 
 821  public:
 822   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 823 
 824   // Allocation
 825   static Handle create(TRAPS);
 826 
 827   // Accessors
 828   static oop name(oop field);
 829   static void set_name(oop field, oop value);
 830 
 831   static int index(oop reflect);
 832   static void set_index(oop reflect, int value);
 833 
 834   static int modifiers(oop reflect);
 835   static void set_modifiers(oop reflect, int value);
 836 
 837   static oop executable(oop constructor);
 838   static void set_executable(oop constructor, oop value);
 839 
 840   friend class JavaClasses;
 841 };
 842 
 843 #define MODULE_INJECTED_FIELDS(macro)                            \
 844   macro(java_lang_Module, module_entry, intptr_signature, false)
 845 
 846 class java_lang_Module {
 847   private:
 848     static int _loader_offset;
 849     static int _name_offset;
 850     static int _module_entry_offset;
 851 
 852     static void compute_offsets();
 853 
 854   public:
 855     static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 856 
 857     // Allocation
 858     static Handle create(Handle loader, Handle module_name, TRAPS);
 859 
 860     // Testers
 861     static bool is_instance(oop obj);
 862 
 863     // Accessors
 864     static oop loader(oop module);
 865     static void set_loader(oop module, oop value);
 866 
 867     // CDS
 868     static int module_entry_offset() { return _module_entry_offset; }
 869 
 870     static oop name(oop module);
 871     static void set_name(oop module, oop value);
 872 
 873     static ModuleEntry* module_entry(oop module);
 874     static ModuleEntry* module_entry_raw(oop module);
 875     static void set_module_entry(oop module, ModuleEntry* module_entry);
 876 
 877   friend class JavaClasses;
 878 };
 879 
 880 // Interface to jdk.internal.reflect.ConstantPool objects
 881 class reflect_ConstantPool {
 882  private:
 883   // Note that to reduce dependencies on the JDK we compute these
 884   // offsets at run-time.
 885   static int _oop_offset;
 886 
 887   static void compute_offsets();
 888 
 889  public:
 890   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 891 
 892   // Allocation
 893   static Handle create(TRAPS);
 894 
 895   // Accessors
 896   static void set_cp(oop reflect, ConstantPool* value);
 897   static int oop_offset() { CHECK_INIT(_oop_offset); }
 898 
 899   static ConstantPool* get_cp(oop reflect);
 900 
 901   // Debugging
 902   friend class JavaClasses;
 903 };
 904 
 905 
 906 // Interface to java.lang primitive type boxing objects:
 907 //  - java.lang.Boolean
 908 //  - java.lang.Character
 909 //  - java.lang.Float
 910 //  - java.lang.Double
 911 //  - java.lang.Byte
 912 //  - java.lang.Short
 913 //  - java.lang.Integer
 914 //  - java.lang.Long
 915 
 916 // This could be separated out into 8 individual classes.
 917 
 918 class java_lang_boxing_object: AllStatic {
 919  private:
 920   static int _value_offset;
 921   static int _long_value_offset;
 922 
 923   static void compute_offsets();
 924   static oop initialize_and_allocate(BasicType type, TRAPS);
 925  public:
 926   // Allocation. Returns a boxed value, or null for invalid type.
 927   static oop create(BasicType type, jvalue* value, TRAPS);
 928   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 929   static BasicType get_value(oop box, jvalue* value);
 930   static BasicType set_value(oop box, jvalue* value);
 931   static BasicType basic_type(oop box);
 932   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 933   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 934   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 935   static void print(BasicType type, jvalue* value, outputStream* st);
 936 
 937   static int value_offset(BasicType type) {
 938     return is_double_word_type(type) ? _long_value_offset : _value_offset;
 939   }
 940 
 941   static void serialize_offsets(SerializeClosure* f);
 942 
 943   // Debugging
 944   friend class JavaClasses;
 945 };
 946 
 947 
 948 
 949 // Interface to java.lang.ref.Reference objects
 950 
 951 class java_lang_ref_Reference: AllStatic {
 952   static int _referent_offset;
 953   static int _queue_offset;
 954   static int _next_offset;
 955   static int _discovered_offset;
 956 
 957   static bool _offsets_initialized;
 958 
 959  public:
 960   // Accessors
 961   static inline oop weak_referent_no_keepalive(oop ref);
 962   static inline oop weak_referent(oop ref);
 963   static inline oop phantom_referent_no_keepalive(oop ref);
 964   static inline oop unknown_referent_no_keepalive(oop ref);
 965   static inline void clear_referent(oop ref);
 966   static inline void clear_referent_raw(oop ref);
 967   static inline HeapWord* referent_addr_raw(oop ref);
 968   static inline oop next(oop ref);
 969   static inline void set_next(oop ref, oop value);
 970   static inline void set_next_raw(oop ref, oop value);
 971   static inline HeapWord* next_addr_raw(oop ref);
 972   static inline oop discovered(oop ref);
 973   static inline void set_discovered(oop ref, oop value);
 974   static inline void set_discovered_raw(oop ref, oop value);
 975   static inline HeapWord* discovered_addr_raw(oop ref);
 976   static bool is_referent_field(oop obj, ptrdiff_t offset);
 977   static inline bool is_final(oop ref);
 978   static inline bool is_phantom(oop ref);
 979   static inline bool is_weak(oop ref);
 980   static inline bool is_soft(oop ref);
 981 
 982   static int referent_offset()    { CHECK_INIT(_referent_offset); }
 983   static int queue_offset()       { CHECK_INIT(_queue_offset); }
 984   static int next_offset()        { CHECK_INIT(_next_offset); }
 985   static int discovered_offset()  { CHECK_INIT(_discovered_offset); }
 986 
 987   static void compute_offsets();
 988   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 989 };
 990 
 991 
 992 // Interface to java.lang.ref.SoftReference objects
 993 
 994 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 995   static int _timestamp_offset;
 996   static int _static_clock_offset;
 997 
 998  public:
 999   // Accessors
1000   static jlong timestamp(oop ref);
1001 
1002   // Accessors for statics
1003   static jlong clock();
1004   static void set_clock(jlong value);
1005 
1006   static void compute_offsets();
1007   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1008 };
1009 
1010 // Interface to java.lang.invoke.MethodHandle objects
1011 
1012 class java_lang_invoke_MethodHandle: AllStatic {
1013   friend class JavaClasses;
1014 
1015  private:
1016   static int _type_offset;               // the MethodType of this MH
1017   static int _form_offset;               // the LambdaForm of this MH
1018 
1019   static void compute_offsets();
1020 
1021  public:
1022   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1023 
1024   // Accessors
1025   static oop            type(oop mh);
1026   static void       set_type(oop mh, oop mtype);
1027 
1028   static oop            form(oop mh);
1029   static void       set_form(oop mh, oop lform);
1030 
1031   // Testers
1032   static bool is_subclass(Klass* klass) {
1033     return klass->is_subclass_of(vmClasses::MethodHandle_klass());
1034   }
1035   static bool is_instance(oop obj);
1036 
1037   // Accessors for code generation:
1038   static int type_offset()             { CHECK_INIT(_type_offset); }
1039   static int form_offset()             { CHECK_INIT(_form_offset); }
1040 };
1041 
1042 // Interface to java.lang.invoke.DirectMethodHandle objects
1043 
1044 class java_lang_invoke_DirectMethodHandle: AllStatic {
1045   friend class JavaClasses;
1046 
1047  private:
1048   static int _member_offset;               // the MemberName of this DMH
1049 
1050   static void compute_offsets();
1051 
1052  public:
1053   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1054 
1055   // Accessors
1056   static oop  member(oop mh);
1057 
1058   // Testers
1059   static bool is_subclass(Klass* klass) {
1060     return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass());
1061   }
1062   static bool is_instance(oop obj);
1063 
1064   // Accessors for code generation:
1065   static int member_offset()           { CHECK_INIT(_member_offset); }
1066 };
1067 
1068 // Interface to java.lang.invoke.LambdaForm objects
1069 // (These are a private interface for managing adapter code generation.)
1070 
1071 class java_lang_invoke_LambdaForm: AllStatic {
1072   friend class JavaClasses;
1073 
1074  private:
1075   static int _vmentry_offset;  // type is MemberName
1076 
1077   static void compute_offsets();
1078 
1079  public:
1080   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1081 
1082   // Accessors
1083   static oop            vmentry(oop lform);
1084 
1085   // Testers
1086   static bool is_subclass(Klass* klass) {
1087     return vmClasses::LambdaForm_klass() != nullptr &&
1088       klass->is_subclass_of(vmClasses::LambdaForm_klass());
1089   }
1090   static bool is_instance(oop obj);
1091 
1092   // Accessors for code generation:
1093   static int vmentry_offset()          { CHECK_INIT(_vmentry_offset); }
1094 };
1095 
1096 // Interface to java.lang.invoke.NativeEntryPoint objects
1097 // (These are a private interface for managing adapter code generation.)
1098 
1099 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
1100   friend class JavaClasses;
1101 
1102  private:
1103   static int _method_type_offset;
1104   static int _downcall_stub_address_offset;
1105 
1106   static void compute_offsets();
1107 
1108  public:
1109   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1110 
1111   // Accessors
1112   static oop        method_type(oop entry);
1113   static jlong      downcall_stub_address(oop entry);
1114 
1115   // Testers
1116   static bool is_subclass(Klass* klass) {
1117     return vmClasses::NativeEntryPoint_klass() != nullptr &&
1118       klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
1119   }
1120   static bool is_instance(oop obj);
1121 
1122   // Accessors for code generation:
1123   static int method_type_offset_in_bytes()           { return _method_type_offset; }
1124   static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
1125 };
1126 
1127 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
1128   friend class JavaClasses;
1129 
1130  private:
1131   static int _inputStorage_offset;
1132   static int _outputStorage_offset;
1133   static int _volatileStorage_offset;
1134   static int _stackAlignment_offset;
1135   static int _shadowSpace_offset;
1136   static int _scratch1_offset;
1137   static int _scratch2_offset;
1138 
1139   static void compute_offsets();
1140 
1141  public:
1142   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1143 
1144   // Accessors
1145   static objArrayOop inputStorage(oop entry);
1146   static objArrayOop outputStorage(oop entry);
1147   static objArrayOop volatileStorage(oop entry);
1148   static jint        stackAlignment(oop entry);
1149   static jint        shadowSpace(oop entry);
1150   static oop         scratch1(oop entry);
1151   static oop         scratch2(oop entry);
1152 
1153   // Testers
1154   static bool is_subclass(Klass* klass) {
1155     return vmClasses::ABIDescriptor_klass() != nullptr &&
1156       klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
1157   }
1158   static bool is_instance(oop obj);
1159 };
1160 
1161 class jdk_internal_foreign_abi_VMStorage: AllStatic {
1162   friend class JavaClasses;
1163 
1164  private:
1165   static int _type_offset;
1166   static int _indexOrOffset_offset;
1167   static int _segmentMaskOrSize_offset;
1168   static int _debugName_offset;
1169 
1170   static void compute_offsets();
1171 
1172  public:
1173   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1174 
1175   // Accessors
1176   static jbyte  type(oop entry);
1177   static jint   index_or_offset(oop entry);
1178   static jshort segment_mask_or_size(oop entry);
1179   static oop    debugName(oop entry);
1180 
1181   // Testers
1182   static bool is_subclass(Klass* klass) {
1183     return vmClasses::VMStorage_klass() != nullptr &&
1184       klass->is_subclass_of(vmClasses::VMStorage_klass());
1185   }
1186   static bool is_instance(oop obj);
1187 };
1188 
1189 class jdk_internal_foreign_abi_CallConv: AllStatic {
1190   friend class JavaClasses;
1191 
1192  private:
1193   static int _argRegs_offset;
1194   static int _retRegs_offset;
1195 
1196   static void compute_offsets();
1197 
1198  public:
1199   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1200 
1201   // Accessors
1202   static objArrayOop argRegs(oop entry);
1203   static objArrayOop retRegs(oop entry);
1204 
1205   // Testers
1206   static bool is_subclass(Klass* klass) {
1207     return vmClasses::CallConv_klass() != nullptr &&
1208       klass->is_subclass_of(vmClasses::CallConv_klass());
1209   }
1210   static bool is_instance(oop obj);
1211 };
1212 
1213 // Interface to java.lang.invoke.MemberName objects
1214 // (These are a private interface for Java code to query the class hierarchy.)
1215 
1216 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \
1217   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1218 
1219 class java_lang_invoke_ResolvedMethodName : AllStatic {
1220   friend class JavaClasses;
1221 
1222   static int _vmtarget_offset;
1223   static int _vmholder_offset;
1224 
1225   static void compute_offsets();
1226  public:
1227   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1228 
1229   static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); }
1230 
1231   static Method* vmtarget(oop resolved_method);
1232   static void set_vmtarget(oop resolved_method, Method* method);
1233 
1234   static void set_vmholder(oop resolved_method, oop holder);
1235 
1236   // find or create resolved member name
1237   static oop find_resolved_method(const methodHandle& m, TRAPS);
1238 
1239   static bool is_instance(oop resolved_method);
1240 };
1241 
1242 
1243 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1244   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)
1245 
1246 
1247 class java_lang_invoke_MemberName: AllStatic {
1248   friend class JavaClasses;
1249 
1250  private:
1251   // From java.lang.invoke.MemberName:
1252   //    private Class<?>   clazz;       // class in which the method is defined
1253   //    private String     name;        // may be null if not yet materialized
1254   //    private Object     type;        // may be null if not yet materialized
1255   //    private int        flags;       // modifier bits; see reflect.Modifier
1256   //    private ResolvedMethodName method;    // holds VM-specific target value
1257   //    private intptr_t   vmindex;     // member index within class or interface
1258   static int _clazz_offset;
1259   static int _name_offset;
1260   static int _type_offset;
1261   static int _flags_offset;
1262   static int _method_offset;
1263   static int _vmindex_offset;
1264 
1265   static void compute_offsets();
1266 
1267  public:
1268   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1269   // Accessors
1270   static oop            clazz(oop mname);
1271   static void       set_clazz(oop mname, oop clazz);
1272 
1273   static oop            type(oop mname);
1274   static void       set_type(oop mname, oop type);
1275 
1276   static oop            name(oop mname);
1277   static void       set_name(oop mname, oop name);
1278 
1279   static int            flags(oop mname);
1280   static void       set_flags(oop mname, int flags);
1281 
1282   // Link through ResolvedMethodName field to get Method*
1283   static Method*        vmtarget(oop mname);
1284   static void       set_method(oop mname, oop method);
1285 
1286   static intptr_t       vmindex(oop mname);
1287   static void       set_vmindex(oop mname, intptr_t index);
1288 
1289   // Testers
1290   static bool is_subclass(Klass* klass) {
1291     return klass->is_subclass_of(vmClasses::MemberName_klass());
1292   }
1293   static bool is_instance(oop obj);
1294 
1295   static bool is_method(oop obj);
1296 
1297   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1298   enum {
1299     MN_IS_METHOD             = 0x00010000, // method (not constructor)
1300     MN_IS_CONSTRUCTOR        = 0x00020000, // constructor
1301     MN_IS_FIELD              = 0x00040000, // field
1302     MN_IS_TYPE               = 0x00080000, // nested type
1303     MN_CALLER_SENSITIVE      = 0x00100000, // @CallerSensitive annotation detected
1304     MN_TRUSTED_FINAL         = 0x00200000, // trusted final field
1305     MN_HIDDEN_MEMBER         = 0x00400000, // @Hidden annotation detected
1306     MN_REFERENCE_KIND_SHIFT  = 24, // refKind
1307     MN_REFERENCE_KIND_MASK   = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1308     MN_NESTMATE_CLASS        = 0x00000001,
1309     MN_HIDDEN_CLASS          = 0x00000002,
1310     MN_STRONG_LOADER_LINK    = 0x00000004,
1311     MN_ACCESS_VM_ANNOTATIONS = 0x00000008,
1312     // Lookup modes
1313     MN_MODULE_MODE           = 0x00000010,
1314     MN_UNCONDITIONAL_MODE    = 0x00000020,
1315     MN_TRUSTED_MODE          = -1
1316   };
1317 
1318   // Accessors for code generation:
1319   static int clazz_offset()   { CHECK_INIT(_clazz_offset); }
1320   static int type_offset()    { CHECK_INIT(_type_offset); }
1321   static int flags_offset()   { CHECK_INIT(_flags_offset); }
1322   static int method_offset()  { CHECK_INIT(_method_offset); }
1323   static int vmindex_offset() { CHECK_INIT(_vmindex_offset); }
1324 };
1325 
1326 
1327 // Interface to java.lang.invoke.MethodType objects
1328 
1329 class java_lang_invoke_MethodType: AllStatic {
1330   friend class JavaClasses;
1331 
1332  private:
1333   static int _rtype_offset;
1334   static int _ptypes_offset;
1335 
1336   static void compute_offsets();
1337 
1338  public:
1339   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1340   // Accessors
1341   static oop            rtype(oop mt);
1342   static objArrayOop    ptypes(oop mt);
1343 
1344   static oop            ptype(oop mt, int index);
1345   static int            ptype_count(oop mt);
1346 
1347   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1348   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1349 
1350   static Symbol*        as_signature(oop mt, bool intern_if_not_found);
1351   static void           print_signature(oop mt, outputStream* st);
1352 
1353   static bool is_instance(oop obj);
1354 
1355   static bool equals(oop mt1, oop mt2);
1356 
1357   // Accessors for code generation:
1358   static int rtype_offset()  { CHECK_INIT(_rtype_offset); }
1359   static int ptypes_offset() { CHECK_INIT(_ptypes_offset); }
1360 };
1361 
1362 
1363 // Interface to java.lang.invoke.CallSite objects
1364 
1365 class java_lang_invoke_CallSite: AllStatic {
1366   friend class JavaClasses;
1367 
1368 private:
1369   static int _target_offset;
1370   static int _context_offset;
1371 
1372   static void compute_offsets();
1373 
1374 public:
1375   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1376   // Accessors
1377   static oop              target(          oop site);
1378   static void         set_target(          oop site, oop target);
1379   static void         set_target_volatile( oop site, oop target);
1380 
1381   static oop context_no_keepalive(oop site);
1382 
1383   // Testers
1384   static bool is_subclass(Klass* klass) {
1385     return klass->is_subclass_of(vmClasses::CallSite_klass());
1386   }
1387   static bool is_instance(oop obj);
1388 
1389   // Accessors for code generation:
1390   static int target_offset()  { CHECK_INIT(_target_offset); }
1391   static int context_offset() { CHECK_INIT(_context_offset); }
1392 };
1393 
1394 // Interface to java.lang.invoke.ConstantCallSite objects
1395 
1396 class java_lang_invoke_ConstantCallSite: AllStatic {
1397   friend class JavaClasses;
1398 
1399 private:
1400   static int _is_frozen_offset;
1401 
1402   static void compute_offsets();
1403 
1404 public:
1405   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1406   // Accessors
1407   static jboolean is_frozen(oop site);
1408 
1409   // Testers
1410   static bool is_subclass(Klass* klass) {
1411     return klass->is_subclass_of(vmClasses::ConstantCallSite_klass());
1412   }
1413   static bool is_instance(oop obj);
1414 };
1415 
1416 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1417 
1418 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1419   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) \
1420   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, last_cleanup, long_signature, false)
1421 
1422 class DependencyContext;
1423 
1424 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1425   friend class JavaClasses;
1426 
1427 private:
1428   static int _vmdependencies_offset;
1429   static int _last_cleanup_offset;
1430 
1431   static void compute_offsets();
1432 
1433 public:
1434   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1435   // Accessors
1436   static DependencyContext vmdependencies(oop context);
1437 
1438   // Testers
1439   static bool is_subclass(Klass* klass) {
1440     return klass->is_subclass_of(vmClasses::Context_klass());
1441   }
1442   static bool is_instance(oop obj);
1443 };
1444 
1445 // Interface to java.security.AccessControlContext objects
1446 
1447 class java_security_AccessControlContext: AllStatic {
1448  private:
1449   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1450   // so we compute the offsets at startup rather than hard-wiring them.
1451   static int _context_offset;
1452   static int _privilegedContext_offset;
1453   static int _isPrivileged_offset;
1454   static int _isAuthorized_offset;
1455 
1456   static void compute_offsets();
1457  public:
1458   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1459   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1460 
1461   // Debugging/initialization
1462   friend class JavaClasses;
1463 };
1464 
1465 
1466 // Interface to java.lang.ClassLoader objects
1467 
1468 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1469   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1470 
1471 class java_lang_ClassLoader : AllStatic {
1472  private:
1473   static int _loader_data_offset;
1474   static int _parent_offset;
1475   static int _parallelCapable_offset;
1476   static int _name_offset;
1477   static int _nameAndId_offset;
1478   static int _unnamedModule_offset;
1479 
1480   static void compute_offsets();
1481 
1482  public:
1483   // Support for CDS
1484   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1485   static int loader_data_offset() { return  _loader_data_offset; }
1486 
1487   static ClassLoaderData* loader_data_acquire(oop loader);
1488   static ClassLoaderData* loader_data(oop loader);
1489   static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1490 
1491   static oop parent(oop loader);
1492   static oop parent_no_keepalive(oop loader);
1493   static oop name(oop loader);
1494   static oop nameAndId(oop loader);
1495   static bool isAncestor(oop loader, oop cl);
1496 
1497   // Support for parallelCapable field
1498   static bool parallelCapable(oop the_class_mirror);
1499 
1500   static bool is_trusted_loader(oop loader);
1501 
1502   // Return true if this is one of the class loaders associated with
1503   // the generated bytecodes for serialization constructor returned
1504   // by sun.reflect.ReflectionFactory::newConstructorForSerialization
1505   static bool is_reflection_class_loader(oop loader);
1506 
1507   // Fix for 4474172
1508   static oop  non_reflection_class_loader(oop loader);
1509 
1510   // Testers
1511   static bool is_subclass(Klass* klass) {
1512     return klass->is_subclass_of(vmClasses::ClassLoader_klass());
1513   }
1514   static bool is_instance(oop obj);
1515 
1516   static oop unnamedModule(oop loader);
1517 
1518   // Debugging
1519   friend class JavaClasses;
1520 };
1521 
1522 
1523 // Interface to java.lang.System objects
1524 
1525 class java_lang_System : AllStatic {
1526  private:
1527   static int _static_in_offset;
1528   static int _static_out_offset;
1529   static int _static_err_offset;
1530   static int _static_security_offset;
1531   static int _static_allow_security_offset;
1532   static int _static_never_offset;
1533 
1534  public:
1535   static int  in_offset() { CHECK_INIT(_static_in_offset); }
1536   static int out_offset() { CHECK_INIT(_static_out_offset); }
1537   static int err_offset() { CHECK_INIT(_static_err_offset); }
1538   static bool allow_security_manager();
1539   static bool has_security_manager();
1540 
1541   static void compute_offsets();
1542   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1543 
1544   // Debugging
1545   friend class JavaClasses;
1546 };
1547 
1548 
1549 // Interface to java.lang.StackTraceElement objects
1550 
1551 class java_lang_StackTraceElement: AllStatic {
1552  private:
1553   static int _declaringClassObject_offset;
1554   static int _classLoaderName_offset;
1555   static int _moduleName_offset;
1556   static int _moduleVersion_offset;
1557   static int _declaringClass_offset;
1558   static int _methodName_offset;
1559   static int _fileName_offset;
1560   static int _lineNumber_offset;
1561 
1562   // Setters
1563   static void set_classLoaderName(oop element, oop value);
1564   static void set_moduleName(oop element, oop value);
1565   static void set_moduleVersion(oop element, oop value);
1566   static void set_declaringClass(oop element, oop value);
1567   static void set_methodName(oop element, oop value);
1568   static void set_fileName(oop element, oop value);
1569   static void set_lineNumber(oop element, int value);
1570   static void set_declaringClassObject(oop element, oop value);
1571 
1572   static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version,
1573                                    const methodHandle& method, int bci,
1574                                    Symbol*& source, oop& source_file, int& line_number, TRAPS);
1575 
1576  public:
1577   // Create an instance of StackTraceElement
1578   static oop create(const methodHandle& method, int bci, TRAPS);
1579 
1580   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1581                       int version, int bci, Symbol* name, TRAPS);
1582 
1583   static void compute_offsets();
1584   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1585 
1586 #if INCLUDE_JVMCI
1587   static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS);
1588 #endif
1589 
1590   // Debugging
1591   friend class JavaClasses;
1592 };
1593 
1594 
1595 class Backtrace: AllStatic {
1596  public:
1597   // Helper backtrace functions to store bci|version together.
1598   static int merge_bci_and_version(int bci, int version);
1599   static int merge_mid_and_cpref(int mid, int cpref);
1600   static int bci_at(unsigned int merged);
1601   static int version_at(unsigned int merged);
1602   static int mid_at(unsigned int merged);
1603   static int cpref_at(unsigned int merged);
1604   static int get_line_number(Method* method, int bci);
1605   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1606 
1607   // Debugging
1608   friend class JavaClasses;
1609 };
1610 
1611 class java_lang_ClassFrameInfo: AllStatic {
1612 private:
1613   static int _classOrMemberName_offset;
1614   static int _flags_offset;
1615 
1616 public:
1617   static oop  classOrMemberName(oop info);
1618   static int  flags(oop info);
1619 
1620   // Setters
1621   static void init_class(Handle stackFrame, const methodHandle& m);
1622   static void init_method(Handle stackFrame, const methodHandle& m, TRAPS);
1623 
1624   static void compute_offsets();
1625   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1626 
1627   // Debugging
1628   friend class JavaClasses;
1629 };
1630 
1631 // Interface to java.lang.StackFrameInfo objects
1632 
1633 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1634   macro(java_lang_StackFrameInfo, version, short_signature, false)
1635 
1636 class java_lang_StackFrameInfo: AllStatic {
1637 private:
1638   static int _type_offset;
1639   static int _name_offset;
1640   static int _bci_offset;
1641   static int _version_offset;
1642   static int _contScope_offset;
1643 
1644 public:
1645   // Getters
1646   static oop name(oop info);
1647   static oop type(oop info);
1648   static Method* get_method(oop info);
1649 
1650   // Setters
1651   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS);
1652   static void set_name(oop info, oop value);
1653   static void set_type(oop info, oop value);
1654   static void set_bci(oop info, int value);
1655 
1656   static void set_version(oop info, short value);
1657   static void set_contScope(oop info, oop value);
1658 
1659   static void compute_offsets();
1660   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1661 
1662   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1663 
1664   // Debugging
1665   friend class JavaClasses;
1666 };
1667 
1668 class java_lang_LiveStackFrameInfo: AllStatic {
1669  private:
1670   static int _monitors_offset;
1671   static int _locals_offset;
1672   static int _operands_offset;
1673   static int _mode_offset;
1674 
1675  public:
1676   static void set_monitors(oop info, oop value);
1677   static void set_locals(oop info, oop value);
1678   static void set_operands(oop info, oop value);
1679   static void set_mode(oop info, int value);
1680 
1681   static void compute_offsets();
1682   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1683 
1684   // Debugging
1685   friend class JavaClasses;
1686 };
1687 
1688 // Interface to java.lang.reflect.RecordComponent objects
1689 
1690 class java_lang_reflect_RecordComponent: AllStatic {
1691  private:
1692   static int _clazz_offset;
1693   static int _name_offset;
1694   static int _type_offset;
1695   static int _accessor_offset;
1696   static int _signature_offset;
1697   static int _annotations_offset;
1698   static int _typeAnnotations_offset;
1699 
1700   // Setters
1701   static void set_clazz(oop element, oop value);
1702   static void set_name(oop element, oop value);
1703   static void set_type(oop element, oop value);
1704   static void set_accessor(oop element, oop value);
1705   static void set_signature(oop element, oop value);
1706   static void set_annotations(oop element, oop value);
1707   static void set_typeAnnotations(oop element, oop value);
1708 
1709  public:
1710   // Create an instance of RecordComponent
1711   static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS);
1712 
1713   static void compute_offsets();
1714   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1715 
1716   // Debugging
1717   friend class JavaClasses;
1718 };
1719 
1720 
1721 // Interface to java.lang.AssertionStatusDirectives objects
1722 
1723 class java_lang_AssertionStatusDirectives: AllStatic {
1724  private:
1725   static int _classes_offset;
1726   static int _classEnabled_offset;
1727   static int _packages_offset;
1728   static int _packageEnabled_offset;
1729   static int _deflt_offset;
1730 
1731  public:
1732   // Setters
1733   static void set_classes(oop obj, oop val);
1734   static void set_classEnabled(oop obj, oop val);
1735   static void set_packages(oop obj, oop val);
1736   static void set_packageEnabled(oop obj, oop val);
1737   static void set_deflt(oop obj, bool val);
1738 
1739   static void compute_offsets();
1740   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1741 
1742   // Debugging
1743   friend class JavaClasses;
1744 };
1745 
1746 
1747 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1748  private:
1749   static int  _owner_offset;
1750  public:
1751   static void compute_offsets();
1752   static oop  get_owner_threadObj(oop obj);
1753   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1754 };
1755 
1756  // Interface to jdk.internal.misc.UnsafeConsants
1757 
1758 class jdk_internal_misc_UnsafeConstants : AllStatic {
1759  public:
1760   static void set_unsafe_constants();
1761   static void compute_offsets() { }
1762   static void serialize_offsets(SerializeClosure* f) { }
1763 };
1764 
1765 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects
1766 
1767 class vector_VectorPayload : AllStatic {
1768  private:
1769   static int _payload_offset;
1770  public:
1771   static void set_payload(oop o, oop val);
1772 
1773   static void compute_offsets();
1774   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1775 
1776   // Testers
1777   static bool is_subclass(Klass* klass) {
1778     return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass());
1779   }
1780   static bool is_instance(oop obj);
1781 };
1782 
1783 class java_lang_Integer : AllStatic {
1784 public:
1785   static jint value(oop obj);
1786 };
1787 
1788 class java_lang_Long : AllStatic {
1789 public:
1790   static jlong value(oop obj);
1791 };
1792 
1793 class java_lang_Character : AllStatic {
1794 public:
1795   static jchar value(oop obj);
1796 };
1797 
1798 class java_lang_Short : AllStatic {
1799 public:
1800   static jshort value(oop obj);
1801 };
1802 
1803 class java_lang_Byte : AllStatic {
1804 public:
1805   static jbyte value(oop obj);
1806 };
1807 
1808 class java_lang_Boolean : AllStatic {
1809  private:
1810   static int _static_TRUE_offset;
1811   static int _static_FALSE_offset;
1812  public:
1813   static Symbol* symbol();
1814   static void compute_offsets(InstanceKlass* k);
1815   static oop  get_TRUE(InstanceKlass *k);
1816   static oop  get_FALSE(InstanceKlass *k);
1817   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1818   static jboolean value(oop obj);
1819 };
1820 
1821 class java_lang_Integer_IntegerCache : AllStatic {
1822  private:
1823   static int _static_cache_offset;
1824  public:
1825   static Symbol* symbol();
1826   static void compute_offsets(InstanceKlass* k);
1827   static objArrayOop  cache(InstanceKlass *k);
1828   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1829 };
1830 
1831 class java_lang_Long_LongCache : AllStatic {
1832  private:
1833   static int _static_cache_offset;
1834  public:
1835   static Symbol* symbol();
1836   static void compute_offsets(InstanceKlass* k);
1837   static objArrayOop  cache(InstanceKlass *k);
1838   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1839 };
1840 
1841 class java_lang_Character_CharacterCache : AllStatic {
1842  private:
1843   static int _static_cache_offset;
1844  public:
1845   static Symbol* symbol();
1846   static void compute_offsets(InstanceKlass* k);
1847   static objArrayOop  cache(InstanceKlass *k);
1848   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1849 };
1850 
1851 class java_lang_Short_ShortCache : AllStatic {
1852  private:
1853   static int _static_cache_offset;
1854  public:
1855   static Symbol* symbol();
1856   static void compute_offsets(InstanceKlass* k);
1857   static objArrayOop  cache(InstanceKlass *k);
1858   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1859 };
1860 
1861 class java_lang_Byte_ByteCache : AllStatic {
1862  private:
1863   static int _static_cache_offset;
1864  public:
1865   static Symbol* symbol();
1866   static void compute_offsets(InstanceKlass* k);
1867   static objArrayOop  cache(InstanceKlass *k);
1868   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1869 };
1870 
1871 
1872 // Interface to java.lang.InternalError objects
1873 
1874 #define INTERNALERROR_INJECTED_FIELDS(macro)                      \
1875   macro(java_lang_InternalError, during_unsafe_access, bool_signature, false)
1876 
1877 class java_lang_InternalError : AllStatic {
1878  private:
1879   static int _during_unsafe_access_offset;
1880  public:
1881   static jboolean during_unsafe_access(oop internal_error);
1882   static void set_during_unsafe_access(oop internal_error);
1883   static void compute_offsets();
1884   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1885 };
1886 
1887 // Use to declare fields that need to be injected into Java classes
1888 // for the JVM to use.  The name_index and signature_index are
1889 // declared in vmSymbols.  The may_be_java flag is used to declare
1890 // fields that might already exist in Java but should be injected if
1891 // they don't.  Otherwise the field is unconditionally injected and
1892 // the JVM uses the injected one.  This is to ensure that name
1893 // collisions don't occur.  In general may_be_java should be false
1894 // unless there's a good reason.
1895 
1896 class InjectedField {
1897  public:
1898   const vmClassID klass_id;
1899   const vmSymbolID name_index;
1900   const vmSymbolID signature_index;
1901   const bool           may_be_java;
1902 
1903 
1904   Klass* klass() const      { return vmClasses::klass_at(klass_id); }
1905   Symbol* name() const      { return lookup_symbol(name_index); }
1906   Symbol* signature() const { return lookup_symbol(signature_index); }
1907 
1908   int compute_offset();
1909 
1910   // Find the Symbol for this index
1911   static Symbol* lookup_symbol(vmSymbolID symbol_index) {
1912     return Symbol::vm_symbol_at(symbol_index);
1913   }
1914 };
1915 
1916 
1917 // Interface to hard-coded offset checking
1918 
1919 enum class InjectedFieldID : int;
1920 
1921 class JavaClasses : AllStatic {
1922  private:
1923 
1924   static InjectedField _injected_fields[];
1925 
1926   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1927  public:
1928 
1929   static int compute_injected_offset(InjectedFieldID id);
1930 
1931   static void compute_offsets();
1932   static void check_offsets() PRODUCT_RETURN;
1933   static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1934   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1935   static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false);
1936 
1937   static void compute_offset(int &dest_offset,
1938                              InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
1939                              bool is_static = false);
1940   static void compute_offset(int& dest_offset, InstanceKlass* ik,
1941                              const char* name_string, Symbol* signature_symbol,
1942                              bool is_static = false);
1943 };
1944 
1945 #undef CHECK_INIT
1946 
1947 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP