1 /*
   2  * Copyright (c) 1997, 2019, 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/systemDictionary.hpp"
  29 #include "jvmtifiles/jvmti.h"
  30 #include "oops/oop.hpp"
  31 #include "runtime/os.hpp"
  32 #include "utilities/utf8.hpp"
  33 
  34 // Interface for manipulating the basic Java classes.
  35 //
  36 // All dependencies on layout of actual Java classes should be kept here.
  37 // If the layout of any of the classes above changes the offsets must be adjusted.
  38 //
  39 // For most classes we hardwire the offsets for performance reasons. In certain
  40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
  41 // startup since the layout here differs between JDK1.2 and JDK1.3.
  42 //
  43 // Note that fields (static and non-static) are arranged with oops before non-oops
  44 // on a per class basis. The offsets below have to reflect this ordering.
  45 //
  46 // When editing the layouts please update the check_offset verification code
  47 // correspondingly. The names in the enums must be identical to the actual field
  48 // names in order for the verification code to work.
  49 
  50 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
  51   f(java_lang_Class) \
  52   f(java_lang_String) \
  53   //end
  54 
  55 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
  56   f(java_lang_System) \
  57   f(java_lang_ClassLoader) \
  58   f(java_lang_Throwable) \
  59   f(java_lang_Thread) \
  60   f(java_lang_ThreadGroup) \
  61   f(java_lang_AssertionStatusDirectives) \
  62   f(java_lang_ref_SoftReference) \
  63   f(java_lang_invoke_MethodHandle) \
  64   f(java_lang_invoke_DirectMethodHandle) \
  65   f(java_lang_invoke_MemberName) \
  66   f(java_lang_invoke_ResolvedMethodName) \
  67   f(java_lang_invoke_LambdaForm) \
  68   f(java_lang_invoke_MethodType) \
  69   f(java_lang_invoke_CallSite) \
  70   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
  71   f(java_security_AccessControlContext) \
  72   f(java_lang_reflect_AccessibleObject) \
  73   f(java_lang_reflect_Method) \
  74   f(java_lang_reflect_Constructor) \
  75   f(java_lang_reflect_Field) \
  76   f(java_nio_Buffer) \
  77   f(reflect_ConstantPool) \
  78   f(reflect_UnsafeStaticFieldAccessorImpl) \
  79   f(java_lang_reflect_Parameter) \
  80   f(java_lang_Module) \
  81   f(java_lang_StackTraceElement) \
  82   f(java_lang_StackFrameInfo) \
  83   f(java_lang_LiveStackFrameInfo) \
  84   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
  85   //end
  86 
  87 #define BASIC_JAVA_CLASSES_DO(f) \
  88         BASIC_JAVA_CLASSES_DO_PART1(f) \
  89         BASIC_JAVA_CLASSES_DO_PART2(f)
  90 
  91 // Interface to java.lang.String objects
  92 
  93 class java_lang_String : AllStatic {
  94  private:
  95   static int value_offset;
  96   static int hash_offset;
  97   static int coder_offset;
  98 
  99   static bool initialized;
 100 
 101   static Handle basic_create(int length, bool byte_arr, TRAPS);
 102 
 103   static inline void set_coder(oop string, jbyte coder);
 104 
 105  public:
 106 
 107   // Coders
 108   enum Coder {
 109     CODER_LATIN1 =  0,
 110     CODER_UTF16  =  1
 111   };
 112 
 113   static void compute_offsets();
 114   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 115 
 116   // Instance creation
 117   static Handle create_from_unicode(const jchar* unicode, int len, TRAPS);
 118   static oop    create_oop_from_unicode(const jchar* unicode, int len, TRAPS);
 119   static Handle create_from_str(const char* utf8_str, TRAPS);
 120   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
 121   static Handle create_from_symbol(Symbol* symbol, TRAPS);
 122   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
 123   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
 124 
 125   static void set_compact_strings(bool value);
 126 
 127   static int value_offset_in_bytes()  {
 128     assert(initialized && (value_offset > 0), "Must be initialized");
 129     return value_offset;
 130   }
 131   static int hash_offset_in_bytes()   {
 132     assert(initialized && (hash_offset > 0), "Must be initialized");
 133     return hash_offset;
 134   }
 135   static int coder_offset_in_bytes()   {
 136     assert(initialized && (coder_offset > 0), "Must be initialized");
 137     return coder_offset;
 138   }
 139 
 140   static inline void set_value_raw(oop string, typeArrayOop buffer);
 141   static inline void set_value(oop string, typeArrayOop buffer);
 142   static inline void set_hash(oop string, unsigned int hash);
 143 
 144   // Accessors
 145   static inline typeArrayOop value(oop java_string);
 146   static inline typeArrayOop value_no_keepalive(oop java_string);
 147   static inline unsigned int hash(oop java_string);
 148   static inline bool is_latin1(oop java_string);
 149   static inline int length(oop java_string);
 150   static inline int length(oop java_string, typeArrayOop string_value);
 151   static int utf8_length(oop java_string);
 152   static int utf8_length(oop java_string, typeArrayOop string_value);
 153 
 154   // String converters
 155   static char*  as_utf8_string(oop java_string);
 156   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 157   static char*  as_utf8_string(oop java_string, int start, int len);
 158   static char*  as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen);
 159   static char*  as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen);
 160   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 161   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 162   // produce an ascii string with all other values quoted using \u####
 163   static char*  as_quoted_ascii(oop java_string);
 164 
 165   // Compute the hash value for a java.lang.String object which would
 166   // contain the characters passed in.
 167   //
 168   // As the hash value used by the String object itself, in
 169   // String.hashCode().  This value is normally calculated in Java code
 170   // in the String.hashCode method(), but is precomputed for String
 171   // objects in the shared archive file.
 172   // hash P(31) from Kernighan & Ritchie
 173   //
 174   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 175   static unsigned int hash_code(const jchar* s, int len) {
 176     unsigned int h = 0;
 177     while (len-- > 0) {
 178       h = 31*h + (unsigned int) *s;
 179       s++;
 180     }
 181     return h;
 182   }
 183 
 184   static unsigned int hash_code(const jbyte* s, int len) {
 185     unsigned int h = 0;
 186     while (len-- > 0) {
 187       h = 31*h + (((unsigned int) *s) & 0xFF);
 188       s++;
 189     }
 190     return h;
 191   }
 192 
 193   static unsigned int hash_code(oop java_string);
 194 
 195   static bool equals(oop java_string, const jchar* chars, int len);
 196   static bool equals(oop str1, oop str2);
 197   static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2);
 198 
 199   // Conversion between '.' and '/' formats
 200   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 201   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 202 
 203   // Conversion
 204   static Symbol* as_symbol(oop java_string, TRAPS);
 205   static Symbol* as_symbol_or_null(oop java_string);
 206 
 207   // Testers
 208   static bool is_instance(oop obj);
 209   static inline bool is_instance_inlined(oop obj);
 210 
 211   // Debugging
 212   static void print(oop java_string, outputStream* st);
 213   friend class JavaClasses;
 214   friend class StringTable;
 215 };
 216 
 217 
 218 // Interface to java.lang.Class objects
 219 
 220 #define CLASS_INJECTED_FIELDS(macro)                                       \
 221   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 222   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 223   macro(java_lang_Class, oop_size,               int_signature,     false) \
 224   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 225   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 226   macro(java_lang_Class, signers,                object_signature,  false) \
 227   macro(java_lang_Class, source_file,            object_signature,  false) \
 228 
 229 class java_lang_Class : AllStatic {
 230   friend class VMStructs;
 231   friend class JVMCIVMStructs;
 232 
 233  private:
 234   // The fake offsets are added by the class loader when java.lang.Class is loaded
 235 
 236   static int _klass_offset;
 237   static int _array_klass_offset;
 238 
 239   static int _oop_size_offset;
 240   static int _static_oop_field_count_offset;
 241 
 242   static int _protection_domain_offset;
 243   static int _init_lock_offset;
 244   static int _signers_offset;
 245   static int _class_loader_offset;
 246   static int _module_offset;
 247   static int _component_mirror_offset;
 248   static int _name_offset;
 249   static int _source_file_offset;
 250   static int _box_mirror_offset;
 251   static int _value_mirror_offset;
 252 
 253   static bool offsets_computed;
 254   static int classRedefinedCount_offset;
 255 
 256   static GrowableArray<Klass*>* _fixup_mirror_list;
 257   static GrowableArray<Klass*>* _fixup_module_field_list;
 258 
 259   static void set_init_lock(oop java_class, oop init_lock);
 260   static void set_protection_domain(oop java_class, oop protection_domain);
 261   static void set_class_loader(oop java_class, oop class_loader);
 262   static void set_component_mirror(oop java_class, oop comp_mirror);
 263   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS);
 264   static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS);
 265  public:
 266   static void allocate_fixup_lists();
 267   static void compute_offsets();
 268 
 269   // Instance creation
 270   static void create_mirror(Klass* k, Handle class_loader, Handle module,
 271                             Handle protection_domain, TRAPS);
 272   static void fixup_mirror(Klass* k, TRAPS);
 273   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 274   static oop  create_value_mirror(Klass* k, Handle mirror, TRAPS);
 275 
 276   // Archiving
 277   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 278   static void archive_basic_type_mirrors(TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
 279   static oop  archive_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(NULL);
 280   static oop  process_archived_mirror(Klass* k, oop mirror, oop archived_mirror, Thread *THREAD)
 281                                       NOT_CDS_JAVA_HEAP_RETURN_(NULL);
 282   static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
 283                                       Handle protection_domain,
 284                                       TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
 285 
 286   static void fixup_module_field(Klass* k, Handle module);
 287 
 288   // Conversion
 289   static Klass* as_Klass(oop java_class);
 290   static Klass* as_Klass_raw(oop java_class);
 291   static void set_klass(oop java_class, Klass* klass);
 292   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 293   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 294   static void print_signature(oop java_class, outputStream *st);
 295   static const char* as_external_name(oop java_class);
 296   // Testing
 297   static bool is_instance(oop obj);
 298 
 299   static bool is_primitive(oop java_class);
 300   static BasicType primitive_type(oop java_class);
 301   static oop primitive_mirror(BasicType t);
 302   // JVM_NewArray support
 303   static Klass* array_klass_acquire(oop java_class);
 304   static void release_set_array_klass(oop java_class, Klass* klass);
 305   // compiler support for class operations
 306   static int klass_offset_in_bytes()                { return _klass_offset; }
 307   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 308   // Support for classRedefinedCount field
 309   static int classRedefinedCount(oop the_class_mirror);
 310   static void set_classRedefinedCount(oop the_class_mirror, int value);
 311 
 312   // Support for embedded per-class oops
 313   static oop  protection_domain(oop java_class);
 314   static oop  init_lock(oop java_class);
 315   static oop  component_mirror(oop java_class);
 316   static objArrayOop  signers(oop java_class);
 317   static void set_signers(oop java_class, objArrayOop signers);
 318 
 319   static oop class_loader(oop java_class);
 320   static void set_module(oop java_class, oop module);
 321   static oop module(oop java_class);
 322 
 323   static void set_box_mirror(oop java_class, oop mirror);
 324   static oop box_mirror(oop java_class);
 325   static bool is_box_type(oop java_class) { // Must match "Class.isBoxType()"
 326     return box_mirror(java_class) == NULL || oopDesc::equals(box_mirror(java_class), java_class);
 327   }
 328 
 329   static void set_value_mirror(oop java_class, oop mirror);
 330   static oop value_mirror(oop java_class);
 331 
 332   static oop name(Handle java_class, TRAPS);
 333 
 334   static oop source_file(oop java_class);
 335   static void set_source_file(oop java_class, oop source_file);
 336 
 337   static int oop_size(oop java_class);
 338   static int oop_size_raw(oop java_class);
 339   static void set_oop_size(HeapWord* java_class, int size);
 340   static int static_oop_field_count(oop java_class);
 341   static int static_oop_field_count_raw(oop java_class);
 342   static void set_static_oop_field_count(oop java_class, int size);
 343 
 344   static GrowableArray<Klass*>* fixup_mirror_list() {
 345     return _fixup_mirror_list;
 346   }
 347   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 348     _fixup_mirror_list = v;
 349   }
 350 
 351   static GrowableArray<Klass*>* fixup_module_field_list() {
 352     return _fixup_module_field_list;
 353   }
 354   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 355     _fixup_module_field_list = v;
 356   }
 357 
 358   // Debugging
 359   friend class JavaClasses;
 360   friend class InstanceKlass;   // verification code accesses offsets
 361   friend class ClassFileParser; // access to number_of_fake_fields
 362 };
 363 
 364 // Interface to java.lang.Thread objects
 365 
 366 class java_lang_Thread : AllStatic {
 367  private:
 368   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 369   // so we compute the offsets at startup rather than hard-wiring them.
 370   static int _name_offset;
 371   static int _group_offset;
 372   static int _contextClassLoader_offset;
 373   static int _inheritedAccessControlContext_offset;
 374   static int _priority_offset;
 375   static int _eetop_offset;
 376   static int _daemon_offset;
 377   static int _stillborn_offset;
 378   static int _stackSize_offset;
 379   static int _tid_offset;
 380   static int _thread_status_offset;
 381   static int _park_blocker_offset;
 382   static int _park_event_offset ;
 383 
 384   static void compute_offsets();
 385 
 386  public:
 387   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 388 
 389   // Instance creation
 390   static oop create();
 391   // Returns the JavaThread associated with the thread obj
 392   static JavaThread* thread(oop java_thread);
 393   // Set JavaThread for instance
 394   static void set_thread(oop java_thread, JavaThread* thread);
 395   // Name
 396   static oop name(oop java_thread);
 397   static void set_name(oop java_thread, oop name);
 398   // Priority
 399   static ThreadPriority priority(oop java_thread);
 400   static void set_priority(oop java_thread, ThreadPriority priority);
 401   // Thread group
 402   static oop  threadGroup(oop java_thread);
 403   // Stillborn
 404   static bool is_stillborn(oop java_thread);
 405   static void set_stillborn(oop java_thread);
 406   // Alive (NOTE: this is not really a field, but provides the correct
 407   // definition without doing a Java call)
 408   static bool is_alive(oop java_thread);
 409   // Daemon
 410   static bool is_daemon(oop java_thread);
 411   static void set_daemon(oop java_thread);
 412   // Context ClassLoader
 413   static oop context_class_loader(oop java_thread);
 414   // Control context
 415   static oop inherited_access_control_context(oop java_thread);
 416   // Stack size hint
 417   static jlong stackSize(oop java_thread);
 418   // Thread ID
 419   static jlong thread_id(oop java_thread);
 420 
 421   // Blocker object responsible for thread parking
 422   static oop park_blocker(oop java_thread);
 423 
 424   // Pointer to type-stable park handler, encoded as jlong.
 425   // Should be set when apparently null
 426   // For details, see unsafe.cpp Unsafe_Unpark
 427   static jlong park_event(oop java_thread);
 428   static bool set_park_event(oop java_thread, jlong ptr);
 429 
 430   // Java Thread Status for JVMTI and M&M use.
 431   // This thread status info is saved in threadStatus field of
 432   // java.lang.Thread java class.
 433   enum ThreadStatus {
 434     NEW                      = 0,
 435     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 436                                JVMTI_THREAD_STATE_RUNNABLE,
 437     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 438                                JVMTI_THREAD_STATE_WAITING +
 439                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 440                                JVMTI_THREAD_STATE_SLEEPING,
 441     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 442                                JVMTI_THREAD_STATE_WAITING +
 443                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 444                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 445     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 446                                JVMTI_THREAD_STATE_WAITING +
 447                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 448                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 449     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 450                                JVMTI_THREAD_STATE_WAITING +
 451                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 452                                JVMTI_THREAD_STATE_PARKED,
 453     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 454                                JVMTI_THREAD_STATE_WAITING +
 455                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 456                                JVMTI_THREAD_STATE_PARKED,
 457     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 458                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 459     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 460   };
 461   // Write thread status info to threadStatus field of java.lang.Thread.
 462   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 463   // Read thread status info from threadStatus field of java.lang.Thread.
 464   static ThreadStatus get_thread_status(oop java_thread_oop);
 465 
 466   static const char*  thread_status_name(oop java_thread_oop);
 467 
 468   // Debugging
 469   friend class JavaClasses;
 470 };
 471 
 472 // Interface to java.lang.ThreadGroup objects
 473 
 474 class java_lang_ThreadGroup : AllStatic {
 475  private:
 476   static int _parent_offset;
 477   static int _name_offset;
 478   static int _threads_offset;
 479   static int _groups_offset;
 480   static int _maxPriority_offset;
 481   static int _destroyed_offset;
 482   static int _daemon_offset;
 483   static int _nthreads_offset;
 484   static int _ngroups_offset;
 485 
 486   static void compute_offsets();
 487 
 488  public:
 489   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 490 
 491   // parent ThreadGroup
 492   static oop  parent(oop java_thread_group);
 493   // name
 494   static const char* name(oop java_thread_group);
 495   // ("name as oop" accessor is not necessary)
 496   // Number of threads in group
 497   static int nthreads(oop java_thread_group);
 498   // threads
 499   static objArrayOop threads(oop java_thread_group);
 500   // Number of threads in group
 501   static int ngroups(oop java_thread_group);
 502   // groups
 503   static objArrayOop groups(oop java_thread_group);
 504   // maxPriority in group
 505   static ThreadPriority maxPriority(oop java_thread_group);
 506   // Destroyed
 507   static bool is_destroyed(oop java_thread_group);
 508   // Daemon
 509   static bool is_daemon(oop java_thread_group);
 510   // Debugging
 511   friend class JavaClasses;
 512 };
 513 
 514 
 515 
 516 // Interface to java.lang.Throwable objects
 517 
 518 class java_lang_Throwable: AllStatic {
 519   friend class BacktraceBuilder;
 520   friend class BacktraceIterator;
 521 
 522  private:
 523   // Offsets
 524   enum {
 525     hc_backtrace_offset     =  0,
 526     hc_detailMessage_offset =  1,
 527     hc_cause_offset         =  2,  // New since 1.4
 528     hc_stackTrace_offset    =  3   // New since 1.4
 529   };
 530   // Trace constants
 531   enum {
 532     trace_methods_offset = 0,
 533     trace_bcis_offset    = 1,
 534     trace_mirrors_offset = 2,
 535     trace_names_offset   = 3,
 536     trace_next_offset    = 4,
 537     trace_size           = 5,
 538     trace_chunk_size     = 32
 539   };
 540 
 541   static int backtrace_offset;
 542   static int detailMessage_offset;
 543   static int stackTrace_offset;
 544   static int depth_offset;
 545   static int static_unassigned_stacktrace_offset;
 546 
 547   // StackTrace (programmatic access, new since 1.4)
 548   static void clear_stacktrace(oop throwable);
 549   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 550   static void set_stacktrace(oop throwable, oop st_element_array);
 551   static oop unassigned_stacktrace();
 552 
 553  public:
 554   // Backtrace
 555   static oop backtrace(oop throwable);
 556   static void set_backtrace(oop throwable, oop value);
 557   static int depth(oop throwable);
 558   static void set_depth(oop throwable, int value);
 559   // Needed by JVMTI to filter out this internal field.
 560   static int get_backtrace_offset() { return backtrace_offset;}
 561   static int get_detailMessage_offset() { return detailMessage_offset;}
 562   // Message
 563   static oop message(oop throwable);
 564   static void set_message(oop throwable, oop value);
 565   static Symbol* detail_message(oop throwable);
 566   static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
 567   static void print_stack_usage(Handle stream);
 568 
 569   static void compute_offsets();
 570   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 571 
 572   // Allocate space for backtrace (created but stack trace not filled in)
 573   static void allocate_backtrace(Handle throwable, TRAPS);
 574   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 575   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 576   // Fill in current stack trace, can cause GC
 577   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 578   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 579   // Programmatic access to stack trace
 580   static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
 581   // Printing
 582   static void print(oop throwable, outputStream* st);
 583   static void print_stack_trace(Handle throwable, outputStream* st);
 584   static void java_printStackTrace(Handle throwable, TRAPS);
 585   // Debugging
 586   friend class JavaClasses;
 587 };
 588 
 589 
 590 // Interface to java.lang.reflect.AccessibleObject objects
 591 
 592 class java_lang_reflect_AccessibleObject: AllStatic {
 593  private:
 594   // Note that to reduce dependencies on the JDK we compute these
 595   // offsets at run-time.
 596   static int override_offset;
 597 
 598   static void compute_offsets();
 599 
 600  public:
 601   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 602 
 603   // Accessors
 604   static jboolean override(oop reflect);
 605   static void set_override(oop reflect, jboolean value);
 606 
 607   // Debugging
 608   friend class JavaClasses;
 609 };
 610 
 611 
 612 // Interface to java.lang.reflect.Method objects
 613 
 614 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 615  private:
 616   // Note that to reduce dependencies on the JDK we compute these
 617   // offsets at run-time.
 618   static int clazz_offset;
 619   static int name_offset;
 620   static int returnType_offset;
 621   static int parameterTypes_offset;
 622   static int exceptionTypes_offset;
 623   static int slot_offset;
 624   static int modifiers_offset;
 625   static int signature_offset;
 626   static int annotations_offset;
 627   static int parameter_annotations_offset;
 628   static int annotation_default_offset;
 629 
 630   static void compute_offsets();
 631  public:
 632   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 633 
 634   // Allocation
 635   static Handle create(TRAPS);
 636 
 637   // Accessors
 638   static oop clazz(oop reflect);
 639   static void set_clazz(oop reflect, oop value);
 640 
 641   static void set_name(oop method, oop value);
 642 
 643   static oop return_type(oop method);
 644   static void set_return_type(oop method, oop value);
 645 
 646   static oop parameter_types(oop method);
 647   static void set_parameter_types(oop method, oop value);
 648 
 649   static int slot(oop reflect);
 650   static void set_slot(oop reflect, int value);
 651 
 652   static void set_exception_types(oop method, oop value);
 653   static void set_modifiers(oop method, int value);
 654   static void set_signature(oop method, oop value);
 655   static void set_annotations(oop method, oop value);
 656   static void set_parameter_annotations(oop method, oop value);
 657   static void set_annotation_default(oop method, oop value);
 658 
 659   // Debugging
 660   friend class JavaClasses;
 661 };
 662 
 663 
 664 // Interface to java.lang.reflect.Constructor objects
 665 
 666 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 667  private:
 668   // Note that to reduce dependencies on the JDK we compute these
 669   // offsets at run-time.
 670   static int clazz_offset;
 671   static int parameterTypes_offset;
 672   static int exceptionTypes_offset;
 673   static int slot_offset;
 674   static int modifiers_offset;
 675   static int signature_offset;
 676   static int annotations_offset;
 677   static int parameter_annotations_offset;
 678 
 679   static void compute_offsets();
 680  public:
 681   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 682 
 683   // Allocation
 684   static Handle create(TRAPS);
 685 
 686   // Accessors
 687   static oop clazz(oop reflect);
 688   static void set_clazz(oop reflect, oop value);
 689 
 690   static oop parameter_types(oop constructor);
 691   static void set_parameter_types(oop constructor, oop value);
 692 
 693   static int slot(oop reflect);
 694   static void set_slot(oop reflect, int value);
 695 
 696   static void set_exception_types(oop constructor, oop value);
 697   static void set_modifiers(oop constructor, int value);
 698   static void set_signature(oop constructor, oop value);
 699   static void set_annotations(oop constructor, oop value);
 700   static void set_parameter_annotations(oop method, oop value);
 701 
 702   // Debugging
 703   friend class JavaClasses;
 704 };
 705 
 706 
 707 // Interface to java.lang.reflect.Field objects
 708 
 709 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 710  private:
 711   // Note that to reduce dependencies on the JDK we compute these
 712   // offsets at run-time.
 713   static int clazz_offset;
 714   static int name_offset;
 715   static int type_offset;
 716   static int slot_offset;
 717   static int modifiers_offset;
 718   static int signature_offset;
 719   static int annotations_offset;
 720 
 721   static void compute_offsets();
 722 
 723  public:
 724   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 725 
 726   // Allocation
 727   static Handle create(TRAPS);
 728 
 729   // Accessors
 730   static oop clazz(oop reflect);
 731   static void set_clazz(oop reflect, oop value);
 732 
 733   static oop name(oop field);
 734   static void set_name(oop field, oop value);
 735 
 736   static oop type(oop field);
 737   static void set_type(oop field, oop value);
 738 
 739   static int slot(oop reflect);
 740   static void set_slot(oop reflect, int value);
 741 
 742   static int modifiers(oop field);
 743   static void set_modifiers(oop field, int value);
 744 
 745   static void set_signature(oop constructor, oop value);
 746   static void set_annotations(oop constructor, oop value);
 747   static void set_parameter_annotations(oop method, oop value);
 748   static void set_annotation_default(oop method, oop value);
 749 
 750   // Debugging
 751   friend class JavaClasses;
 752 };
 753 
 754 class java_lang_reflect_Parameter {
 755  private:
 756   // Note that to reduce dependencies on the JDK we compute these
 757   // offsets at run-time.
 758   static int name_offset;
 759   static int modifiers_offset;
 760   static int index_offset;
 761   static int executable_offset;
 762 
 763   static void compute_offsets();
 764 
 765  public:
 766   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 767 
 768   // Allocation
 769   static Handle create(TRAPS);
 770 
 771   // Accessors
 772   static oop name(oop field);
 773   static void set_name(oop field, oop value);
 774 
 775   static int index(oop reflect);
 776   static void set_index(oop reflect, int value);
 777 
 778   static int modifiers(oop reflect);
 779   static void set_modifiers(oop reflect, int value);
 780 
 781   static oop executable(oop constructor);
 782   static void set_executable(oop constructor, oop value);
 783 
 784   friend class JavaClasses;
 785 };
 786 
 787 #define MODULE_INJECTED_FIELDS(macro)                            \
 788   macro(java_lang_Module, module_entry, intptr_signature, false)
 789 
 790 class java_lang_Module {
 791   private:
 792     static int loader_offset;
 793     static int name_offset;
 794     static int _module_entry_offset;
 795     static void compute_offsets();
 796 
 797   public:
 798     static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 799 
 800     // Allocation
 801     static Handle create(Handle loader, Handle module_name, TRAPS);
 802 
 803     // Testers
 804     static bool is_instance(oop obj);
 805 
 806     // Accessors
 807     static oop loader(oop module);
 808     static void set_loader(oop module, oop value);
 809 
 810     static oop name(oop module);
 811     static void set_name(oop module, oop value);
 812 
 813     static ModuleEntry* module_entry(oop module);
 814     static void set_module_entry(oop module, ModuleEntry* module_entry);
 815 
 816   friend class JavaClasses;
 817 };
 818 
 819 // Interface to jdk.internal.reflect.ConstantPool objects
 820 class reflect_ConstantPool {
 821  private:
 822   // Note that to reduce dependencies on the JDK we compute these
 823   // offsets at run-time.
 824   static int _oop_offset;
 825 
 826   static void compute_offsets();
 827 
 828  public:
 829   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 830 
 831   // Allocation
 832   static Handle create(TRAPS);
 833 
 834   // Accessors
 835   static void set_cp(oop reflect, ConstantPool* value);
 836   static int oop_offset() {
 837     return _oop_offset;
 838   }
 839 
 840   static ConstantPool* get_cp(oop reflect);
 841 
 842   // Debugging
 843   friend class JavaClasses;
 844 };
 845 
 846 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
 847 class reflect_UnsafeStaticFieldAccessorImpl {
 848  private:
 849   static int _base_offset;
 850   static void compute_offsets();
 851 
 852  public:
 853   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 854 
 855   static int base_offset() {
 856     return _base_offset;
 857   }
 858 
 859   // Debugging
 860   friend class JavaClasses;
 861 };
 862 
 863 // Interface to java.lang primitive type boxing objects:
 864 //  - java.lang.Boolean
 865 //  - java.lang.Character
 866 //  - java.lang.Float
 867 //  - java.lang.Double
 868 //  - java.lang.Byte
 869 //  - java.lang.Short
 870 //  - java.lang.Integer
 871 //  - java.lang.Long
 872 
 873 // This could be separated out into 8 individual classes.
 874 
 875 class java_lang_boxing_object: AllStatic {
 876  private:
 877   enum {
 878    hc_value_offset = 0
 879   };
 880   static int value_offset;
 881   static int long_value_offset;
 882 
 883   static oop initialize_and_allocate(BasicType type, TRAPS);
 884  public:
 885   // Allocation. Returns a boxed value, or NULL for invalid type.
 886   static oop create(BasicType type, jvalue* value, TRAPS);
 887   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 888   static BasicType get_value(oop box, jvalue* value);
 889   static BasicType set_value(oop box, jvalue* value);
 890   static BasicType basic_type(oop box);
 891   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 892   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 893   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 894   static void print(BasicType type, jvalue* value, outputStream* st);
 895 
 896   static int value_offset_in_bytes(BasicType type) {
 897     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 898                                                     value_offset;
 899   }
 900 
 901   // Debugging
 902   friend class JavaClasses;
 903 };
 904 
 905 
 906 
 907 // Interface to java.lang.ref.Reference objects
 908 
 909 class java_lang_ref_Reference: AllStatic {
 910  public:
 911   enum {
 912    hc_referent_offset   = 0,
 913    hc_queue_offset      = 1,
 914    hc_next_offset       = 2,
 915    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 916   };
 917 
 918   static int referent_offset;
 919   static int queue_offset;
 920   static int next_offset;
 921   static int discovered_offset;
 922 
 923   // Accessors
 924   static inline oop referent(oop ref);
 925   static inline void set_referent(oop ref, oop value);
 926   static inline void set_referent_raw(oop ref, oop value);
 927   static inline HeapWord* referent_addr_raw(oop ref);
 928   static inline oop next(oop ref);
 929   static inline void set_next(oop ref, oop value);
 930   static inline void set_next_raw(oop ref, oop value);
 931   static inline HeapWord* next_addr_raw(oop ref);
 932   static inline oop discovered(oop ref);
 933   static inline void set_discovered(oop ref, oop value);
 934   static inline void set_discovered_raw(oop ref, oop value);
 935   static inline HeapWord* discovered_addr_raw(oop ref);
 936   static inline oop queue(oop ref);
 937   static inline void set_queue(oop ref, oop value);
 938   static bool is_referent_field(oop obj, ptrdiff_t offset);
 939   static inline bool is_final(oop ref);
 940   static inline bool is_phantom(oop ref);
 941 };
 942 
 943 
 944 // Interface to java.lang.ref.SoftReference objects
 945 
 946 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 947  public:
 948   static int timestamp_offset;
 949   static int static_clock_offset;
 950 
 951   // Accessors
 952   static jlong timestamp(oop ref);
 953 
 954   // Accessors for statics
 955   static jlong clock();
 956   static void set_clock(jlong value);
 957 
 958   static void compute_offsets();
 959   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 960 };
 961 
 962 // Interface to java.lang.invoke.MethodHandle objects
 963 
 964 class MethodHandleEntry;
 965 
 966 class java_lang_invoke_MethodHandle: AllStatic {
 967   friend class JavaClasses;
 968 
 969  private:
 970   static int _type_offset;               // the MethodType of this MH
 971   static int _form_offset;               // the LambdaForm of this MH
 972 
 973   static void compute_offsets();
 974 
 975  public:
 976   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
 977 
 978   // Accessors
 979   static oop            type(oop mh);
 980   static void       set_type(oop mh, oop mtype);
 981 
 982   static oop            form(oop mh);
 983   static void       set_form(oop mh, oop lform);
 984 
 985   // Testers
 986   static bool is_subclass(Klass* klass) {
 987     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 988   }
 989   static bool is_instance(oop obj);
 990 
 991   // Accessors for code generation:
 992   static int type_offset_in_bytes()             { return _type_offset; }
 993   static int form_offset_in_bytes()             { return _form_offset; }
 994 };
 995 
 996 // Interface to java.lang.invoke.DirectMethodHandle objects
 997 
 998 class java_lang_invoke_DirectMethodHandle: AllStatic {
 999   friend class JavaClasses;
1000 
1001  private:
1002   static int _member_offset;               // the MemberName of this DMH
1003 
1004   static void compute_offsets();
1005 
1006  public:
1007   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1008 
1009   // Accessors
1010   static oop  member(oop mh);
1011 
1012   // Testers
1013   static bool is_subclass(Klass* klass) {
1014     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1015   }
1016   static bool is_instance(oop obj);
1017 
1018   // Accessors for code generation:
1019   static int member_offset_in_bytes()           { return _member_offset; }
1020 };
1021 
1022 // Interface to java.lang.invoke.LambdaForm objects
1023 // (These are a private interface for managing adapter code generation.)
1024 
1025 class java_lang_invoke_LambdaForm: AllStatic {
1026   friend class JavaClasses;
1027 
1028  private:
1029   static int _vmentry_offset;  // type is MemberName
1030 
1031   static void compute_offsets();
1032 
1033  public:
1034   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1035 
1036   // Accessors
1037   static oop            vmentry(oop lform);
1038   static void       set_vmentry(oop lform, oop invoker);
1039 
1040   // Testers
1041   static bool is_subclass(Klass* klass) {
1042     return SystemDictionary::LambdaForm_klass() != NULL &&
1043       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1044   }
1045   static bool is_instance(oop obj);
1046 
1047   // Accessors for code generation:
1048   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1049 };
1050 
1051 
1052 // Interface to java.lang.invoke.MemberName objects
1053 // (These are a private interface for Java code to query the class hierarchy.)
1054 
1055 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \
1056   macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \
1057   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1058 
1059 class java_lang_invoke_ResolvedMethodName : AllStatic {
1060   friend class JavaClasses;
1061 
1062   static int _vmtarget_offset;
1063   static int _vmholder_offset;
1064 
1065   static void compute_offsets();
1066  public:
1067   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1068 
1069   static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1070 
1071   static Method* vmtarget(oop resolved_method);
1072   static void set_vmtarget(oop resolved_method, Method* method);
1073 
1074   // find or create resolved member name
1075   static oop find_resolved_method(const methodHandle& m, TRAPS);
1076 
1077   static bool is_instance(oop resolved_method);
1078 };
1079 
1080 
1081 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1082   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)
1083 
1084 
1085 class java_lang_invoke_MemberName: AllStatic {
1086   friend class JavaClasses;
1087 
1088  private:
1089   // From java.lang.invoke.MemberName:
1090   //    private Class<?>   clazz;       // class in which the method is defined
1091   //    private String     name;        // may be null if not yet materialized
1092   //    private Object     type;        // may be null if not yet materialized
1093   //    private int        flags;       // modifier bits; see reflect.Modifier
1094   //    private ResolvedMethodName method;    // holds VM-specific target value
1095   //    private intptr_t   vmindex;     // member index within class or interface
1096   static int _clazz_offset;
1097   static int _name_offset;
1098   static int _type_offset;
1099   static int _flags_offset;
1100   static int _method_offset;
1101   static int _vmindex_offset;
1102 
1103   static void compute_offsets();
1104 
1105  public:
1106   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1107   // Accessors
1108   static oop            clazz(oop mname);
1109   static void       set_clazz(oop mname, oop clazz);
1110 
1111   static oop            type(oop mname);
1112   static void       set_type(oop mname, oop type);
1113 
1114   static oop            name(oop mname);
1115   static void       set_name(oop mname, oop name);
1116 
1117   static int            flags(oop mname);
1118   static void       set_flags(oop mname, int flags);
1119 
1120   // Link through ResolvedMethodName field to get Method*
1121   static Method*        vmtarget(oop mname);
1122   static void       set_method(oop mname, oop method);
1123 
1124   static intptr_t       vmindex(oop mname);
1125   static void       set_vmindex(oop mname, intptr_t index);
1126 
1127   // Testers
1128   static bool is_subclass(Klass* klass) {
1129     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1130   }
1131   static bool is_instance(oop obj);
1132 
1133   static bool is_method(oop obj);
1134 
1135   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1136   enum {
1137     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1138     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1139     MN_IS_FIELD             = 0x00040000, // field
1140     MN_IS_TYPE              = 0x00080000, // nested type
1141     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1142     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1143     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1144     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1145     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1146     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1147   };
1148 
1149   // Accessors for code generation:
1150   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1151   static int type_offset_in_bytes()             { return _type_offset; }
1152   static int name_offset_in_bytes()             { return _name_offset; }
1153   static int flags_offset_in_bytes()            { return _flags_offset; }
1154   static int method_offset_in_bytes()           { return _method_offset; }
1155   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1156 };
1157 
1158 
1159 // Interface to java.lang.invoke.MethodType objects
1160 
1161 class java_lang_invoke_MethodType: AllStatic {
1162   friend class JavaClasses;
1163 
1164  private:
1165   static int _rtype_offset;
1166   static int _ptypes_offset;
1167 
1168   static void compute_offsets();
1169 
1170  public:
1171   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1172   // Accessors
1173   static oop            rtype(oop mt);
1174   static objArrayOop    ptypes(oop mt);
1175 
1176   static oop            ptype(oop mt, int index);
1177   static int            ptype_count(oop mt);
1178 
1179   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1180   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1181 
1182   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1183   static void           print_signature(oop mt, outputStream* st);
1184 
1185   static bool is_instance(oop obj);
1186 
1187   static bool equals(oop mt1, oop mt2);
1188 
1189   // Accessors for code generation:
1190   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1191   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1192 };
1193 
1194 
1195 // Interface to java.lang.invoke.CallSite objects
1196 
1197 class java_lang_invoke_CallSite: AllStatic {
1198   friend class JavaClasses;
1199 
1200 private:
1201   static int _target_offset;
1202   static int _context_offset;
1203 
1204   static void compute_offsets();
1205 
1206 public:
1207   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1208   // Accessors
1209   static oop              target(          oop site);
1210   static void         set_target(          oop site, oop target);
1211   static void         set_target_volatile( oop site, oop target);
1212 
1213   static oop context_no_keepalive(oop site);
1214 
1215   // Testers
1216   static bool is_subclass(Klass* klass) {
1217     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1218   }
1219   static bool is_instance(oop obj);
1220 
1221   // Accessors for code generation:
1222   static int target_offset_in_bytes()           { return _target_offset; }
1223 };
1224 
1225 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1226 
1227 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1228   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) \
1229   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, last_cleanup, long_signature, false)
1230 
1231 class DependencyContext;
1232 
1233 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1234   friend class JavaClasses;
1235 
1236 private:
1237   static int _vmdependencies_offset;
1238   static int _last_cleanup_offset;
1239 
1240   static void compute_offsets();
1241 
1242 public:
1243   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1244   // Accessors
1245   static DependencyContext vmdependencies(oop context);
1246 
1247   // Testers
1248   static bool is_subclass(Klass* klass) {
1249     return klass->is_subclass_of(SystemDictionary::Context_klass());
1250   }
1251   static bool is_instance(oop obj);
1252 };
1253 
1254 // Interface to java.security.AccessControlContext objects
1255 
1256 class java_security_AccessControlContext: AllStatic {
1257  private:
1258   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1259   // so we compute the offsets at startup rather than hard-wiring them.
1260   static int _context_offset;
1261   static int _privilegedContext_offset;
1262   static int _isPrivileged_offset;
1263   static int _isAuthorized_offset;
1264 
1265   static void compute_offsets();
1266  public:
1267   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1268   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1269 
1270   // Debugging/initialization
1271   friend class JavaClasses;
1272 };
1273 
1274 
1275 // Interface to java.lang.ClassLoader objects
1276 
1277 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1278   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1279 
1280 class java_lang_ClassLoader : AllStatic {
1281  private:
1282   static int _loader_data_offset;
1283   static bool offsets_computed;
1284   static int parent_offset;
1285   static int parallelCapable_offset;
1286   static int name_offset;
1287   static int nameAndId_offset;
1288   static int unnamedModule_offset;
1289 
1290  public:
1291   static void compute_offsets();
1292   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1293 
1294   static ClassLoaderData* loader_data_acquire(oop loader);
1295   static ClassLoaderData* loader_data_raw(oop loader);
1296   static void release_set_loader_data(oop loader, ClassLoaderData* new_data);
1297 
1298   static oop parent(oop loader);
1299   static oop name(oop loader);
1300   static oop nameAndId(oop loader);
1301   static bool isAncestor(oop loader, oop cl);
1302 
1303   // Support for parallelCapable field
1304   static bool parallelCapable(oop the_class_mirror);
1305 
1306   static bool is_trusted_loader(oop loader);
1307 
1308   // Return true if this is one of the class loaders associated with
1309   // the generated bytecodes for reflection.
1310   static bool is_reflection_class_loader(oop loader);
1311 
1312   // Fix for 4474172
1313   static oop  non_reflection_class_loader(oop loader);
1314 
1315   // Testers
1316   static bool is_subclass(Klass* klass) {
1317     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1318   }
1319   static bool is_instance(oop obj);
1320 
1321   static oop unnamedModule(oop loader);
1322 
1323   // Debugging
1324   friend class JavaClasses;
1325   friend class ClassFileParser; // access to number_of_fake_fields
1326 };
1327 
1328 
1329 // Interface to java.lang.System objects
1330 
1331 class java_lang_System : AllStatic {
1332  private:
1333   static int  static_in_offset;
1334   static int static_out_offset;
1335   static int static_err_offset;
1336   static int static_security_offset;
1337 
1338  public:
1339   static int  in_offset_in_bytes();
1340   static int out_offset_in_bytes();
1341   static int err_offset_in_bytes();
1342 
1343   static void compute_offsets();
1344   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1345 
1346   // Debugging
1347   friend class JavaClasses;
1348 };
1349 
1350 
1351 // Interface to java.lang.StackTraceElement objects
1352 
1353 class java_lang_StackTraceElement: AllStatic {
1354  private:
1355   static int declaringClassObject_offset;
1356   static int classLoaderName_offset;
1357   static int moduleName_offset;
1358   static int moduleVersion_offset;
1359   static int declaringClass_offset;
1360   static int methodName_offset;
1361   static int fileName_offset;
1362   static int lineNumber_offset;
1363 
1364   // Setters
1365   static void set_classLoaderName(oop element, oop value);
1366   static void set_moduleName(oop element, oop value);
1367   static void set_moduleVersion(oop element, oop value);
1368   static void set_declaringClass(oop element, oop value);
1369   static void set_methodName(oop element, oop value);
1370   static void set_fileName(oop element, oop value);
1371   static void set_lineNumber(oop element, int value);
1372   static void set_declaringClassObject(oop element, oop value);
1373 
1374  public:
1375   // Create an instance of StackTraceElement
1376   static oop create(const methodHandle& method, int bci, TRAPS);
1377 
1378   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1379                       int version, int bci, Symbol* name, TRAPS);
1380 
1381   static void compute_offsets();
1382   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1383 
1384   // Debugging
1385   friend class JavaClasses;
1386 };
1387 
1388 
1389 class Backtrace: AllStatic {
1390  public:
1391   // Helper backtrace functions to store bci|version together.
1392   static int merge_bci_and_version(int bci, int version);
1393   static int merge_mid_and_cpref(int mid, int cpref);
1394   static int bci_at(unsigned int merged);
1395   static int version_at(unsigned int merged);
1396   static int mid_at(unsigned int merged);
1397   static int cpref_at(unsigned int merged);
1398   static int get_line_number(const methodHandle& method, int bci);
1399   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1400 
1401   // Debugging
1402   friend class JavaClasses;
1403 };
1404 
1405 // Interface to java.lang.StackFrameInfo objects
1406 
1407 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1408   macro(java_lang_StackFrameInfo, version, short_signature, false)
1409 
1410 class java_lang_StackFrameInfo: AllStatic {
1411 private:
1412   static int _memberName_offset;
1413   static int _bci_offset;
1414   static int _version_offset;
1415 
1416   static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1417 
1418 public:
1419   // Setters
1420   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS);
1421   static void set_bci(oop info, int value);
1422 
1423   static void set_version(oop info, short value);
1424 
1425   static void compute_offsets();
1426   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1427 
1428   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1429 
1430   // Debugging
1431   friend class JavaClasses;
1432 };
1433 
1434 class java_lang_LiveStackFrameInfo: AllStatic {
1435  private:
1436   static int _monitors_offset;
1437   static int _locals_offset;
1438   static int _operands_offset;
1439   static int _mode_offset;
1440 
1441  public:
1442   static void set_monitors(oop info, oop value);
1443   static void set_locals(oop info, oop value);
1444   static void set_operands(oop info, oop value);
1445   static void set_mode(oop info, int value);
1446 
1447   static void compute_offsets();
1448   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1449 
1450   // Debugging
1451   friend class JavaClasses;
1452 };
1453 
1454 // Interface to java.lang.AssertionStatusDirectives objects
1455 
1456 class java_lang_AssertionStatusDirectives: AllStatic {
1457  private:
1458   static int classes_offset;
1459   static int classEnabled_offset;
1460   static int packages_offset;
1461   static int packageEnabled_offset;
1462   static int deflt_offset;
1463 
1464  public:
1465   // Setters
1466   static void set_classes(oop obj, oop val);
1467   static void set_classEnabled(oop obj, oop val);
1468   static void set_packages(oop obj, oop val);
1469   static void set_packageEnabled(oop obj, oop val);
1470   static void set_deflt(oop obj, bool val);
1471 
1472   static void compute_offsets();
1473   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1474 
1475   // Debugging
1476   friend class JavaClasses;
1477 };
1478 
1479 
1480 class java_nio_Buffer: AllStatic {
1481  private:
1482   static int _limit_offset;
1483 
1484  public:
1485   static int  limit_offset();
1486   static void compute_offsets();
1487   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1488 };
1489 
1490 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1491  private:
1492   static int  _owner_offset;
1493  public:
1494   static void compute_offsets();
1495   static oop  get_owner_threadObj(oop obj);
1496   static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
1497 };
1498 
1499 // Use to declare fields that need to be injected into Java classes
1500 // for the JVM to use.  The name_index and signature_index are
1501 // declared in vmSymbols.  The may_be_java flag is used to declare
1502 // fields that might already exist in Java but should be injected if
1503 // they don't.  Otherwise the field is unconditionally injected and
1504 // the JVM uses the injected one.  This is to ensure that name
1505 // collisions don't occur.  In general may_be_java should be false
1506 // unless there's a good reason.
1507 
1508 class InjectedField {
1509  public:
1510   const SystemDictionary::WKID klass_id;
1511   const vmSymbols::SID name_index;
1512   const vmSymbols::SID signature_index;
1513   const bool           may_be_java;
1514 
1515 
1516   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1517   Symbol* name() const      { return lookup_symbol(name_index); }
1518   Symbol* signature() const { return lookup_symbol(signature_index); }
1519 
1520   int compute_offset();
1521 
1522   // Find the Symbol for this index
1523   static Symbol* lookup_symbol(int symbol_index) {
1524     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1525   }
1526 };
1527 
1528 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1529   klass##_##name##_enum,
1530 
1531 #define ALL_INJECTED_FIELDS(macro)          \
1532   CLASS_INJECTED_FIELDS(macro)              \
1533   CLASSLOADER_INJECTED_FIELDS(macro)        \
1534   RESOLVEDMETHOD_INJECTED_FIELDS(macro)     \
1535   MEMBERNAME_INJECTED_FIELDS(macro)         \
1536   CALLSITECONTEXT_INJECTED_FIELDS(macro)    \
1537   STACKFRAMEINFO_INJECTED_FIELDS(macro)     \
1538   MODULE_INJECTED_FIELDS(macro)
1539 
1540 // Interface to hard-coded offset checking
1541 
1542 class JavaClasses : AllStatic {
1543  private:
1544 
1545   static InjectedField _injected_fields[];
1546 
1547   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1548  public:
1549   enum InjectedFieldID {
1550     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1551     MAX_enum
1552   };
1553 
1554   static int compute_injected_offset(InjectedFieldID id);
1555 
1556   static void compute_hard_coded_offsets();
1557   static void compute_offsets();
1558   static void check_offsets() PRODUCT_RETURN;
1559   static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN;
1560   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1561 };
1562 
1563 #undef DECLARE_INJECTED_FIELD_ENUM
1564 
1565 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP