1 /*
   2  * Copyright (c) 1997, 2017, 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_VM_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_VM_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 
  51 // Interface to java.lang.String objects
  52 
  53 class java_lang_String : AllStatic {
  54  private:
  55   static int value_offset;
  56   static int hash_offset;
  57   static int coder_offset;
  58 
  59   static bool initialized;
  60 
  61   static Handle basic_create(int length, bool byte_arr, TRAPS);
  62 
  63   static inline void set_coder(oop string, jbyte coder);
  64 
  65  public:
  66 
  67   // Coders
  68   enum Coder {
  69     CODER_LATIN1 =  0,
  70     CODER_UTF16  =  1
  71   };
  72 
  73   static void compute_offsets();
  74 
  75   // Instance creation
  76   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  77   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  78   static Handle create_from_str(const char* utf8_str, TRAPS);
  79   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  80   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  81   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  82   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  83 
  84   static void set_compact_strings(bool value);
  85 
  86   static int value_offset_in_bytes()  {
  87     assert(initialized && (value_offset > 0), "Must be initialized");
  88     return value_offset;
  89   }
  90   static int hash_offset_in_bytes()   {
  91     assert(initialized && (hash_offset > 0), "Must be initialized");
  92     return hash_offset;
  93   }
  94   static int coder_offset_in_bytes()   {
  95     assert(initialized && (coder_offset > 0), "Must be initialized");
  96     return coder_offset;
  97   }
  98 
  99   static inline void set_value_raw(oop string, typeArrayOop buffer);
 100   static inline void set_value(oop string, typeArrayOop buffer);
 101   static inline void set_hash(oop string, unsigned int hash);
 102 
 103   // Accessors
 104   static inline typeArrayOop value(oop java_string);
 105   static inline unsigned int hash(oop java_string);
 106   static inline bool is_latin1(oop java_string);
 107   static inline int length(oop java_string);
 108   static int utf8_length(oop java_string);
 109 
 110   // String converters
 111   static char*  as_utf8_string(oop java_string);
 112   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 113   static char*  as_utf8_string(oop java_string, int start, int len);
 114   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 115   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 116   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 117   // produce an ascii string with all other values quoted using \u####
 118   static char*  as_quoted_ascii(oop java_string);
 119 
 120   // Compute the hash value for a java.lang.String object which would
 121   // contain the characters passed in.
 122   //
 123   // As the hash value used by the String object itself, in
 124   // String.hashCode().  This value is normally calculated in Java code
 125   // in the String.hashCode method(), but is precomputed for String
 126   // objects in the shared archive file.
 127   // hash P(31) from Kernighan & Ritchie
 128   //
 129   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 130   static unsigned int hash_code(const jchar* s, int len) {
 131     unsigned int h = 0;
 132     while (len-- > 0) {
 133       h = 31*h + (unsigned int) *s;
 134       s++;
 135     }
 136     return h;
 137   }
 138 
 139   static unsigned int hash_code(const jbyte* s, int len) {
 140     unsigned int h = 0;
 141     while (len-- > 0) {
 142       h = 31*h + (((unsigned int) *s) & 0xFF);
 143       s++;
 144     }
 145     return h;
 146   }
 147 
 148   static unsigned int hash_code(oop java_string);
 149 
 150   static bool equals(oop java_string, jchar* chars, int len);
 151   static bool equals(oop str1, oop str2);
 152 
 153   // Conversion between '.' and '/' formats
 154   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 155   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 156 
 157   // Conversion
 158   static Symbol* as_symbol(oop java_string, TRAPS);
 159   static Symbol* as_symbol_or_null(oop java_string);
 160 
 161   // Testers
 162   static bool is_instance(oop obj);
 163   static inline bool is_instance_inlined(oop obj);
 164 
 165   // Debugging
 166   static void print(oop java_string, outputStream* st);
 167   friend class JavaClasses;
 168   friend class StringTable;
 169 };
 170 
 171 
 172 // Interface to java.lang.Class objects
 173 
 174 #define CLASS_INJECTED_FIELDS(macro)                                       \
 175   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 176   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 177   macro(java_lang_Class, oop_size,               int_signature,     false) \
 178   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 179   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 180   macro(java_lang_Class, signers,                object_signature,  false)
 181 
 182 class java_lang_Class : AllStatic {
 183   friend class VMStructs;
 184   friend class JVMCIVMStructs;
 185 
 186  private:
 187   // The fake offsets are added by the class loader when java.lang.Class is loaded
 188 
 189   static int _klass_offset;
 190   static int _array_klass_offset;
 191 
 192   static int _oop_size_offset;
 193   static int _static_oop_field_count_offset;
 194 
 195   static int _protection_domain_offset;
 196   static int _init_lock_offset;
 197   static int _signers_offset;
 198   static int _class_loader_offset;
 199   static int _module_offset;
 200   static int _component_mirror_offset;
 201 
 202   static bool offsets_computed;
 203   static int classRedefinedCount_offset;
 204 
 205   static GrowableArray<Klass*>* _fixup_mirror_list;
 206   static GrowableArray<Klass*>* _fixup_module_field_list;
 207 
 208   static void set_init_lock(oop java_class, oop init_lock);
 209   static void set_protection_domain(oop java_class, oop protection_domain);
 210   static void set_class_loader(oop java_class, oop class_loader);
 211   static void set_component_mirror(oop java_class, oop comp_mirror);
 212   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS);
 213   static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS);
 214  public:
 215   static void allocate_fixup_lists();
 216   static void compute_offsets();
 217 
 218   // Instance creation
 219   static void create_mirror(Klass* k, Handle class_loader, Handle module,
 220                             Handle protection_domain, TRAPS);
 221   static void fixup_mirror(Klass* k, TRAPS);
 222   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 223 
 224   static void fixup_module_field(Klass* k, Handle module);
 225 
 226   // Conversion
 227   static Klass* as_Klass(oop java_class);
 228   static void set_klass(oop java_class, Klass* klass);
 229   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 230   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 231   static void print_signature(oop java_class, outputStream *st);
 232   static const char* as_external_name(oop java_class);
 233   // Testing
 234   static bool is_instance(oop obj);
 235 
 236   static bool is_primitive(oop java_class);
 237   static BasicType primitive_type(oop java_class);
 238   static oop primitive_mirror(BasicType t);
 239   // JVM_NewArray support
 240   static Klass* array_klass_acquire(oop java_class);
 241   static void release_set_array_klass(oop java_class, Klass* klass);
 242   // compiler support for class operations
 243   static int klass_offset_in_bytes()                { return _klass_offset; }
 244   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 245   // Support for classRedefinedCount field
 246   static int classRedefinedCount(oop the_class_mirror);
 247   static void set_classRedefinedCount(oop the_class_mirror, int value);
 248 
 249   // Support for embedded per-class oops
 250   static oop  protection_domain(oop java_class);
 251   static oop  init_lock(oop java_class);
 252   static oop  component_mirror(oop java_class);
 253   static objArrayOop  signers(oop java_class);
 254   static void set_signers(oop java_class, objArrayOop signers);
 255 
 256   static oop class_loader(oop java_class);
 257   static void set_module(oop java_class, oop module);
 258   static oop module(oop java_class);
 259 
 260   static int oop_size(oop java_class);
 261   static void set_oop_size(oop java_class, int size);
 262   static int static_oop_field_count(oop java_class);
 263   static void set_static_oop_field_count(oop java_class, int size);
 264 
 265   static GrowableArray<Klass*>* fixup_mirror_list() {
 266     return _fixup_mirror_list;
 267   }
 268   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 269     _fixup_mirror_list = v;
 270   }
 271 
 272   static GrowableArray<Klass*>* fixup_module_field_list() {
 273     return _fixup_module_field_list;
 274   }
 275   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 276     _fixup_module_field_list = v;
 277   }
 278 
 279   // Debugging
 280   friend class JavaClasses;
 281   friend class InstanceKlass;   // verification code accesses offsets
 282   friend class ClassFileParser; // access to number_of_fake_fields
 283 };
 284 
 285 // Interface to java.lang.Thread objects
 286 
 287 class java_lang_Thread : AllStatic {
 288  private:
 289   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 290   // so we compute the offsets at startup rather than hard-wiring them.
 291   static int _name_offset;
 292   static int _group_offset;
 293   static int _contextClassLoader_offset;
 294   static int _inheritedAccessControlContext_offset;
 295   static int _priority_offset;
 296   static int _eetop_offset;
 297   static int _daemon_offset;
 298   static int _stillborn_offset;
 299   static int _stackSize_offset;
 300   static int _tid_offset;
 301   static int _thread_status_offset;
 302   static int _park_blocker_offset;
 303   static int _park_event_offset ;
 304 
 305   static void compute_offsets();
 306 
 307  public:
 308   // Instance creation
 309   static oop create();
 310   // Returns the JavaThread associated with the thread obj
 311   static JavaThread* thread(oop java_thread);
 312   // Set JavaThread for instance
 313   static void set_thread(oop java_thread, JavaThread* thread);
 314   // Name
 315   static oop name(oop java_thread);
 316   static void set_name(oop java_thread, oop name);
 317   // Priority
 318   static ThreadPriority priority(oop java_thread);
 319   static void set_priority(oop java_thread, ThreadPriority priority);
 320   // Thread group
 321   static oop  threadGroup(oop java_thread);
 322   // Stillborn
 323   static bool is_stillborn(oop java_thread);
 324   static void set_stillborn(oop java_thread);
 325   // Alive (NOTE: this is not really a field, but provides the correct
 326   // definition without doing a Java call)
 327   static bool is_alive(oop java_thread);
 328   // Daemon
 329   static bool is_daemon(oop java_thread);
 330   static void set_daemon(oop java_thread);
 331   // Context ClassLoader
 332   static oop context_class_loader(oop java_thread);
 333   // Control context
 334   static oop inherited_access_control_context(oop java_thread);
 335   // Stack size hint
 336   static jlong stackSize(oop java_thread);
 337   // Thread ID
 338   static jlong thread_id(oop java_thread);
 339 
 340   // Blocker object responsible for thread parking
 341   static oop park_blocker(oop java_thread);
 342 
 343   // Pointer to type-stable park handler, encoded as jlong.
 344   // Should be set when apparently null
 345   // For details, see unsafe.cpp Unsafe_Unpark
 346   static jlong park_event(oop java_thread);
 347   static bool set_park_event(oop java_thread, jlong ptr);
 348 
 349   // Java Thread Status for JVMTI and M&M use.
 350   // This thread status info is saved in threadStatus field of
 351   // java.lang.Thread java class.
 352   enum ThreadStatus {
 353     NEW                      = 0,
 354     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 355                                JVMTI_THREAD_STATE_RUNNABLE,
 356     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 357                                JVMTI_THREAD_STATE_WAITING +
 358                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 359                                JVMTI_THREAD_STATE_SLEEPING,
 360     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 361                                JVMTI_THREAD_STATE_WAITING +
 362                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 363                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 364     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 365                                JVMTI_THREAD_STATE_WAITING +
 366                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 367                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 368     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 369                                JVMTI_THREAD_STATE_WAITING +
 370                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 371                                JVMTI_THREAD_STATE_PARKED,
 372     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 373                                JVMTI_THREAD_STATE_WAITING +
 374                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 375                                JVMTI_THREAD_STATE_PARKED,
 376     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 377                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 378     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 379   };
 380   // Write thread status info to threadStatus field of java.lang.Thread.
 381   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 382   // Read thread status info from threadStatus field of java.lang.Thread.
 383   static ThreadStatus get_thread_status(oop java_thread_oop);
 384 
 385   static const char*  thread_status_name(oop java_thread_oop);
 386 
 387   // Debugging
 388   friend class JavaClasses;
 389 };
 390 
 391 // Interface to java.lang.ThreadGroup objects
 392 
 393 class java_lang_ThreadGroup : AllStatic {
 394  private:
 395   static int _parent_offset;
 396   static int _name_offset;
 397   static int _threads_offset;
 398   static int _groups_offset;
 399   static int _maxPriority_offset;
 400   static int _destroyed_offset;
 401   static int _daemon_offset;
 402   static int _nthreads_offset;
 403   static int _ngroups_offset;
 404 
 405   static void compute_offsets();
 406 
 407  public:
 408   // parent ThreadGroup
 409   static oop  parent(oop java_thread_group);
 410   // name
 411   static const char* name(oop java_thread_group);
 412   // ("name as oop" accessor is not necessary)
 413   // Number of threads in group
 414   static int nthreads(oop java_thread_group);
 415   // threads
 416   static objArrayOop threads(oop java_thread_group);
 417   // Number of threads in group
 418   static int ngroups(oop java_thread_group);
 419   // groups
 420   static objArrayOop groups(oop java_thread_group);
 421   // maxPriority in group
 422   static ThreadPriority maxPriority(oop java_thread_group);
 423   // Destroyed
 424   static bool is_destroyed(oop java_thread_group);
 425   // Daemon
 426   static bool is_daemon(oop java_thread_group);
 427   // Debugging
 428   friend class JavaClasses;
 429 };
 430 
 431 
 432 
 433 // Interface to java.lang.Throwable objects
 434 
 435 class java_lang_Throwable: AllStatic {
 436   friend class BacktraceBuilder;
 437   friend class BacktraceIterator;
 438 
 439  private:
 440   // Offsets
 441   enum {
 442     hc_backtrace_offset     =  0,
 443     hc_detailMessage_offset =  1,
 444     hc_cause_offset         =  2,  // New since 1.4
 445     hc_stackTrace_offset    =  3   // New since 1.4
 446   };
 447   enum {
 448       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 449   };
 450   // Trace constants
 451   enum {
 452     trace_methods_offset = 0,
 453     trace_bcis_offset    = 1,
 454     trace_mirrors_offset = 2,
 455     trace_names_offset   = 3,
 456     trace_next_offset    = 4,
 457     trace_size           = 5,
 458     trace_chunk_size     = 32
 459   };
 460 
 461   static int backtrace_offset;
 462   static int detailMessage_offset;
 463   static int stackTrace_offset;
 464   static int depth_offset;
 465   static int static_unassigned_stacktrace_offset;
 466 
 467   // StackTrace (programmatic access, new since 1.4)
 468   static void clear_stacktrace(oop throwable);
 469   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 470   static void set_stacktrace(oop throwable, oop st_element_array);
 471   static oop unassigned_stacktrace();
 472 
 473  public:
 474   // Backtrace
 475   static oop backtrace(oop throwable);
 476   static void set_backtrace(oop throwable, oop value);
 477   static int depth(oop throwable);
 478   static void set_depth(oop throwable, int value);
 479   // Needed by JVMTI to filter out this internal field.
 480   static int get_backtrace_offset() { return backtrace_offset;}
 481   static int get_detailMessage_offset() { return detailMessage_offset;}
 482   // Message
 483   static oop message(oop throwable);
 484   static void set_message(oop throwable, oop value);
 485   static Symbol* detail_message(oop throwable);
 486   static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
 487   static void print_stack_usage(Handle stream);
 488 
 489   static void compute_offsets();
 490 
 491   // Allocate space for backtrace (created but stack trace not filled in)
 492   static void allocate_backtrace(Handle throwable, TRAPS);
 493   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 494   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 495   // Fill in current stack trace, can cause GC
 496   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 497   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 498   // Programmatic access to stack trace
 499   static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
 500   // Printing
 501   static void print(oop throwable, outputStream* st);
 502   static void print_stack_trace(Handle throwable, outputStream* st);
 503   static void java_printStackTrace(Handle throwable, TRAPS);
 504   // Debugging
 505   friend class JavaClasses;
 506 };
 507 
 508 
 509 // Interface to java.lang.reflect.AccessibleObject objects
 510 
 511 class java_lang_reflect_AccessibleObject: AllStatic {
 512  private:
 513   // Note that to reduce dependencies on the JDK we compute these
 514   // offsets at run-time.
 515   static int override_offset;
 516 
 517   static void compute_offsets();
 518 
 519  public:
 520   // Accessors
 521   static jboolean override(oop reflect);
 522   static void set_override(oop reflect, jboolean value);
 523 
 524   // Debugging
 525   friend class JavaClasses;
 526 };
 527 
 528 
 529 // Interface to java.lang.reflect.Method objects
 530 
 531 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 532  private:
 533   // Note that to reduce dependencies on the JDK we compute these
 534   // offsets at run-time.
 535   static int clazz_offset;
 536   static int name_offset;
 537   static int returnType_offset;
 538   static int parameterTypes_offset;
 539   static int exceptionTypes_offset;
 540   static int slot_offset;
 541   static int modifiers_offset;
 542   static int signature_offset;
 543   static int annotations_offset;
 544   static int parameter_annotations_offset;
 545   static int annotation_default_offset;
 546   static int type_annotations_offset;
 547 
 548   static void compute_offsets();
 549 
 550  public:
 551   // Allocation
 552   static Handle create(TRAPS);
 553 
 554   // Accessors
 555   static oop clazz(oop reflect);
 556   static void set_clazz(oop reflect, oop value);
 557 
 558   static oop name(oop method);
 559   static void set_name(oop method, oop value);
 560 
 561   static oop return_type(oop method);
 562   static void set_return_type(oop method, oop value);
 563 
 564   static oop parameter_types(oop method);
 565   static void set_parameter_types(oop method, oop value);
 566 
 567   static oop exception_types(oop method);
 568   static void set_exception_types(oop method, oop value);
 569 
 570   static int slot(oop reflect);
 571   static void set_slot(oop reflect, int value);
 572 
 573   static int modifiers(oop method);
 574   static void set_modifiers(oop method, int value);
 575 
 576   static bool has_signature_field();
 577   static oop signature(oop method);
 578   static void set_signature(oop method, oop value);
 579 
 580   static bool has_annotations_field();
 581   static oop annotations(oop method);
 582   static void set_annotations(oop method, oop value);
 583 
 584   static bool has_parameter_annotations_field();
 585   static oop parameter_annotations(oop method);
 586   static void set_parameter_annotations(oop method, oop value);
 587 
 588   static bool has_annotation_default_field();
 589   static oop annotation_default(oop method);
 590   static void set_annotation_default(oop method, oop value);
 591 
 592   static bool has_type_annotations_field();
 593   static oop type_annotations(oop method);
 594   static void set_type_annotations(oop method, oop value);
 595 
 596   // Debugging
 597   friend class JavaClasses;
 598 };
 599 
 600 
 601 // Interface to java.lang.reflect.Constructor objects
 602 
 603 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 604  private:
 605   // Note that to reduce dependencies on the JDK we compute these
 606   // offsets at run-time.
 607   static int clazz_offset;
 608   static int parameterTypes_offset;
 609   static int exceptionTypes_offset;
 610   static int slot_offset;
 611   static int modifiers_offset;
 612   static int signature_offset;
 613   static int annotations_offset;
 614   static int parameter_annotations_offset;
 615   static int type_annotations_offset;
 616 
 617   static void compute_offsets();
 618 
 619  public:
 620   // Allocation
 621   static Handle create(TRAPS);
 622 
 623   // Accessors
 624   static oop clazz(oop reflect);
 625   static void set_clazz(oop reflect, oop value);
 626 
 627   static oop parameter_types(oop constructor);
 628   static void set_parameter_types(oop constructor, oop value);
 629 
 630   static oop exception_types(oop constructor);
 631   static void set_exception_types(oop constructor, oop value);
 632 
 633   static int slot(oop reflect);
 634   static void set_slot(oop reflect, int value);
 635 
 636   static int modifiers(oop constructor);
 637   static void set_modifiers(oop constructor, int value);
 638 
 639   static bool has_signature_field();
 640   static oop signature(oop constructor);
 641   static void set_signature(oop constructor, oop value);
 642 
 643   static bool has_annotations_field();
 644   static oop annotations(oop constructor);
 645   static void set_annotations(oop constructor, oop value);
 646 
 647   static bool has_parameter_annotations_field();
 648   static oop parameter_annotations(oop method);
 649   static void set_parameter_annotations(oop method, oop value);
 650 
 651   static bool has_type_annotations_field();
 652   static oop type_annotations(oop constructor);
 653   static void set_type_annotations(oop constructor, oop value);
 654 
 655   // Debugging
 656   friend class JavaClasses;
 657 };
 658 
 659 
 660 // Interface to java.lang.reflect.Field objects
 661 
 662 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 663  private:
 664   // Note that to reduce dependencies on the JDK we compute these
 665   // offsets at run-time.
 666   static int clazz_offset;
 667   static int name_offset;
 668   static int type_offset;
 669   static int slot_offset;
 670   static int modifiers_offset;
 671   static int signature_offset;
 672   static int annotations_offset;
 673   static int type_annotations_offset;
 674 
 675   static void compute_offsets();
 676 
 677  public:
 678   // Allocation
 679   static Handle create(TRAPS);
 680 
 681   // Accessors
 682   static oop clazz(oop reflect);
 683   static void set_clazz(oop reflect, oop value);
 684 
 685   static oop name(oop field);
 686   static void set_name(oop field, oop value);
 687 
 688   static oop type(oop field);
 689   static void set_type(oop field, oop value);
 690 
 691   static int slot(oop reflect);
 692   static void set_slot(oop reflect, int value);
 693 
 694   static int modifiers(oop field);
 695   static void set_modifiers(oop field, int value);
 696 
 697   static bool has_signature_field();
 698   static oop signature(oop constructor);
 699   static void set_signature(oop constructor, oop value);
 700 
 701   static bool has_annotations_field();
 702   static oop annotations(oop constructor);
 703   static void set_annotations(oop constructor, oop value);
 704 
 705   static bool has_parameter_annotations_field();
 706   static oop parameter_annotations(oop method);
 707   static void set_parameter_annotations(oop method, oop value);
 708 
 709   static bool has_annotation_default_field();
 710   static oop annotation_default(oop method);
 711   static void set_annotation_default(oop method, oop value);
 712 
 713   static bool has_type_annotations_field();
 714   static oop type_annotations(oop field);
 715   static void set_type_annotations(oop field, oop value);
 716 
 717   // Debugging
 718   friend class JavaClasses;
 719 };
 720 
 721 class java_lang_reflect_Parameter {
 722  private:
 723   // Note that to reduce dependencies on the JDK we compute these
 724   // offsets at run-time.
 725   static int name_offset;
 726   static int modifiers_offset;
 727   static int index_offset;
 728   static int executable_offset;
 729 
 730   static void compute_offsets();
 731 
 732  public:
 733   // Allocation
 734   static Handle create(TRAPS);
 735 
 736   // Accessors
 737   static oop name(oop field);
 738   static void set_name(oop field, oop value);
 739 
 740   static int index(oop reflect);
 741   static void set_index(oop reflect, int value);
 742 
 743   static int modifiers(oop reflect);
 744   static void set_modifiers(oop reflect, int value);
 745 
 746   static oop executable(oop constructor);
 747   static void set_executable(oop constructor, oop value);
 748 
 749   friend class JavaClasses;
 750 };
 751 
 752 #define MODULE_INJECTED_FIELDS(macro)                            \
 753   macro(java_lang_Module, module_entry, intptr_signature, false)
 754 
 755 class java_lang_Module {
 756   private:
 757     static int loader_offset;
 758     static int name_offset;
 759     static int _module_entry_offset;
 760     static void compute_offsets();
 761 
 762   public:
 763     // Allocation
 764     static Handle create(Handle loader, Handle module_name, TRAPS);
 765 
 766     // Testers
 767     static bool is_instance(oop obj);
 768 
 769     // Accessors
 770     static oop loader(oop module);
 771     static void set_loader(oop module, oop value);
 772 
 773     static oop name(oop module);
 774     static void set_name(oop module, oop value);
 775 
 776     static ModuleEntry* module_entry(oop module, TRAPS);
 777     static void set_module_entry(oop module, ModuleEntry* module_entry);
 778 
 779   friend class JavaClasses;
 780 };
 781 
 782 // Interface to jdk.internal.reflect.ConstantPool objects
 783 class reflect_ConstantPool {
 784  private:
 785   // Note that to reduce dependencies on the JDK we compute these
 786   // offsets at run-time.
 787   static int _oop_offset;
 788 
 789   static void compute_offsets();
 790 
 791  public:
 792   // Allocation
 793   static Handle create(TRAPS);
 794 
 795   // Accessors
 796   static void set_cp(oop reflect, ConstantPool* value);
 797   static int oop_offset() {
 798     return _oop_offset;
 799   }
 800 
 801   static ConstantPool* get_cp(oop reflect);
 802 
 803   // Debugging
 804   friend class JavaClasses;
 805 };
 806 
 807 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
 808 class reflect_UnsafeStaticFieldAccessorImpl {
 809  private:
 810   static int _base_offset;
 811   static void compute_offsets();
 812 
 813  public:
 814   static int base_offset() {
 815     return _base_offset;
 816   }
 817 
 818   // Debugging
 819   friend class JavaClasses;
 820 };
 821 
 822 // Interface to java.lang primitive type boxing objects:
 823 //  - java.lang.Boolean
 824 //  - java.lang.Character
 825 //  - java.lang.Float
 826 //  - java.lang.Double
 827 //  - java.lang.Byte
 828 //  - java.lang.Short
 829 //  - java.lang.Integer
 830 //  - java.lang.Long
 831 
 832 // This could be separated out into 8 individual classes.
 833 
 834 class java_lang_boxing_object: AllStatic {
 835  private:
 836   enum {
 837    hc_value_offset = 0
 838   };
 839   static int value_offset;
 840   static int long_value_offset;
 841 
 842   static oop initialize_and_allocate(BasicType type, TRAPS);
 843  public:
 844   // Allocation. Returns a boxed value, or NULL for invalid type.
 845   static oop create(BasicType type, jvalue* value, TRAPS);
 846   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 847   static BasicType get_value(oop box, jvalue* value);
 848   static BasicType set_value(oop box, jvalue* value);
 849   static BasicType basic_type(oop box);
 850   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 851   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 852   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 853   static void print(BasicType type, jvalue* value, outputStream* st);
 854 
 855   static int value_offset_in_bytes(BasicType type) {
 856     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 857                                                     value_offset;
 858   }
 859 
 860   // Debugging
 861   friend class JavaClasses;
 862 };
 863 
 864 
 865 
 866 // Interface to java.lang.ref.Reference objects
 867 
 868 class java_lang_ref_Reference: AllStatic {
 869  public:
 870   enum {
 871    hc_referent_offset   = 0,
 872    hc_queue_offset      = 1,
 873    hc_next_offset       = 2,
 874    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 875   };
 876 
 877   static int referent_offset;
 878   static int queue_offset;
 879   static int next_offset;
 880   static int discovered_offset;
 881   static int number_of_fake_oop_fields;
 882 
 883   // Accessors
 884   static inline oop referent(oop ref);
 885   static inline void set_referent(oop ref, oop value);
 886   static inline void set_referent_raw(oop ref, oop value);
 887   static inline HeapWord* referent_addr(oop ref);
 888   static inline oop next(oop ref);
 889   static inline void set_next(oop ref, oop value);
 890   static inline void set_next_raw(oop ref, oop value);
 891   static inline HeapWord* next_addr(oop ref);
 892   static inline oop discovered(oop ref);
 893   static inline void set_discovered(oop ref, oop value);
 894   static inline void set_discovered_raw(oop ref, oop value);
 895   static inline HeapWord* discovered_addr(oop ref);
 896 };
 897 
 898 
 899 // Interface to java.lang.ref.SoftReference objects
 900 
 901 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 902  public:
 903   enum {
 904    // The timestamp is a long field and may need to be adjusted for alignment.
 905    hc_timestamp_offset  = hc_discovered_offset + 1
 906   };
 907   enum {
 908    hc_static_clock_offset = 0
 909   };
 910 
 911   static int timestamp_offset;
 912   static int static_clock_offset;
 913 
 914   // Accessors
 915   static jlong timestamp(oop ref);
 916 
 917   // Accessors for statics
 918   static jlong clock();
 919   static void set_clock(jlong value);
 920 };
 921 
 922 // Interface to java.lang.Continuation objects
 923 
 924 class java_lang_Continuation: AllStatic {
 925 public:
 926  enum {
 927   hc_target_offset = 1,
 928  };
 929 
 930  static int target_offset;
 931 
 932  // Accessors
 933  static inline oop target(oop ref);
 934 };
 935 
 936 // Interface to java.lang.invoke.MethodHandle objects
 937 
 938 class MethodHandleEntry;
 939 
 940 class java_lang_invoke_MethodHandle: AllStatic {
 941   friend class JavaClasses;
 942 
 943  private:
 944   static int _type_offset;               // the MethodType of this MH
 945   static int _form_offset;               // the LambdaForm of this MH
 946 
 947   static void compute_offsets();
 948 
 949  public:
 950   // Accessors
 951   static oop            type(oop mh);
 952   static void       set_type(oop mh, oop mtype);
 953 
 954   static oop            form(oop mh);
 955   static void       set_form(oop mh, oop lform);
 956 
 957   // Testers
 958   static bool is_subclass(Klass* klass) {
 959     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 960   }
 961   static bool is_instance(oop obj);
 962 
 963   // Accessors for code generation:
 964   static int type_offset_in_bytes()             { return _type_offset; }
 965   static int form_offset_in_bytes()             { return _form_offset; }
 966 };
 967 
 968 // Interface to java.lang.invoke.DirectMethodHandle objects
 969 
 970 class java_lang_invoke_DirectMethodHandle: AllStatic {
 971   friend class JavaClasses;
 972 
 973  private:
 974   static int _member_offset;               // the MemberName of this DMH
 975 
 976   static void compute_offsets();
 977 
 978  public:
 979   // Accessors
 980   static oop  member(oop mh);
 981 
 982   // Testers
 983   static bool is_subclass(Klass* klass) {
 984     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
 985   }
 986   static bool is_instance(oop obj);
 987 
 988   // Accessors for code generation:
 989   static int member_offset_in_bytes()           { return _member_offset; }
 990 };
 991 
 992 // Interface to java.lang.invoke.LambdaForm objects
 993 // (These are a private interface for managing adapter code generation.)
 994 
 995 class java_lang_invoke_LambdaForm: AllStatic {
 996   friend class JavaClasses;
 997 
 998  private:
 999   static int _vmentry_offset;  // type is MemberName
1000 
1001   static void compute_offsets();
1002 
1003  public:
1004   // Accessors
1005   static oop            vmentry(oop lform);
1006   static void       set_vmentry(oop lform, oop invoker);
1007 
1008   // Testers
1009   static bool is_subclass(Klass* klass) {
1010     return SystemDictionary::LambdaForm_klass() != NULL &&
1011       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1012   }
1013   static bool is_instance(oop obj);
1014 
1015   // Accessors for code generation:
1016   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1017 };
1018 
1019 
1020 // Interface to java.lang.invoke.MemberName objects
1021 // (These are a private interface for Java code to query the class hierarchy.)
1022 
1023 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \
1024   macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \
1025   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1026 
1027 class java_lang_invoke_ResolvedMethodName : AllStatic {
1028   friend class JavaClasses;
1029 
1030   static int _vmtarget_offset;
1031   static int _vmholder_offset;
1032 
1033   static void compute_offsets();
1034  public:
1035   static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1036 
1037   static Method* vmtarget(oop resolved_method);
1038   static void set_vmtarget(oop resolved_method, Method* method);
1039 
1040   // find or create resolved member name
1041   static oop find_resolved_method(const methodHandle& m, TRAPS);
1042 
1043   static bool is_instance(oop resolved_method);
1044 };
1045 
1046 
1047 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1048   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)
1049 
1050 
1051 class java_lang_invoke_MemberName: AllStatic {
1052   friend class JavaClasses;
1053 
1054  private:
1055   // From java.lang.invoke.MemberName:
1056   //    private Class<?>   clazz;       // class in which the method is defined
1057   //    private String     name;        // may be null if not yet materialized
1058   //    private Object     type;        // may be null if not yet materialized
1059   //    private int        flags;       // modifier bits; see reflect.Modifier
1060   //    private ResolvedMethodName method;    // holds VM-specific target value
1061   //    private intptr_t   vmindex;     // member index within class or interface
1062   static int _clazz_offset;
1063   static int _name_offset;
1064   static int _type_offset;
1065   static int _flags_offset;
1066   static int _method_offset;
1067   static int _vmindex_offset;
1068 
1069   static void compute_offsets();
1070 
1071  public:
1072   // Accessors
1073   static oop            clazz(oop mname);
1074   static void       set_clazz(oop mname, oop clazz);
1075 
1076   static oop            type(oop mname);
1077   static void       set_type(oop mname, oop type);
1078 
1079   static oop            name(oop mname);
1080   static void       set_name(oop mname, oop name);
1081 
1082   static int            flags(oop mname);
1083   static void       set_flags(oop mname, int flags);
1084 
1085   // Link through ResolvedMethodName field to get Method*
1086   static Method*        vmtarget(oop mname);
1087   static void       set_method(oop mname, oop method);
1088 
1089   static intptr_t       vmindex(oop mname);
1090   static void       set_vmindex(oop mname, intptr_t index);
1091 
1092   // Testers
1093   static bool is_subclass(Klass* klass) {
1094     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1095   }
1096   static bool is_instance(oop obj);
1097 
1098   static bool is_method(oop obj);
1099 
1100   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1101   enum {
1102     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1103     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1104     MN_IS_FIELD             = 0x00040000, // field
1105     MN_IS_TYPE              = 0x00080000, // nested type
1106     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1107     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1108     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1109     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1110     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1111     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1112   };
1113 
1114   // Accessors for code generation:
1115   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1116   static int type_offset_in_bytes()             { return _type_offset; }
1117   static int name_offset_in_bytes()             { return _name_offset; }
1118   static int flags_offset_in_bytes()            { return _flags_offset; }
1119   static int method_offset_in_bytes()           { return _method_offset; }
1120   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1121 };
1122 
1123 
1124 // Interface to java.lang.invoke.MethodType objects
1125 
1126 class java_lang_invoke_MethodType: AllStatic {
1127   friend class JavaClasses;
1128 
1129  private:
1130   static int _rtype_offset;
1131   static int _ptypes_offset;
1132 
1133   static void compute_offsets();
1134 
1135  public:
1136   // Accessors
1137   static oop            rtype(oop mt);
1138   static objArrayOop    ptypes(oop mt);
1139 
1140   static oop            ptype(oop mt, int index);
1141   static int            ptype_count(oop mt);
1142 
1143   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1144   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1145 
1146   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1147   static void           print_signature(oop mt, outputStream* st);
1148 
1149   static bool is_instance(oop obj);
1150 
1151   static bool equals(oop mt1, oop mt2);
1152 
1153   // Accessors for code generation:
1154   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1155   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1156 };
1157 
1158 
1159 // Interface to java.lang.invoke.CallSite objects
1160 
1161 class java_lang_invoke_CallSite: AllStatic {
1162   friend class JavaClasses;
1163 
1164 private:
1165   static int _target_offset;
1166   static int _context_offset;
1167 
1168   static void compute_offsets();
1169 
1170 public:
1171   // Accessors
1172   static oop              target(          oop site);
1173   static void         set_target(          oop site, oop target);
1174   static void         set_target_volatile( oop site, oop target);
1175 
1176   static oop              context(oop site);
1177 
1178   // Testers
1179   static bool is_subclass(Klass* klass) {
1180     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1181   }
1182   static bool is_instance(oop obj);
1183 
1184   // Accessors for code generation:
1185   static int target_offset_in_bytes()           { return _target_offset; }
1186 };
1187 
1188 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1189 
1190 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1191   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1192 
1193 class DependencyContext;
1194 
1195 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1196   friend class JavaClasses;
1197 
1198 private:
1199   static int _vmdependencies_offset;
1200 
1201   static void compute_offsets();
1202 
1203 public:
1204   // Accessors
1205   static DependencyContext vmdependencies(oop context);
1206 
1207   // Testers
1208   static bool is_subclass(Klass* klass) {
1209     return klass->is_subclass_of(SystemDictionary::Context_klass());
1210   }
1211   static bool is_instance(oop obj);
1212 };
1213 
1214 // Interface to java.security.AccessControlContext objects
1215 
1216 class java_security_AccessControlContext: AllStatic {
1217  private:
1218   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1219   // so we compute the offsets at startup rather than hard-wiring them.
1220   static int _context_offset;
1221   static int _privilegedContext_offset;
1222   static int _isPrivileged_offset;
1223   static int _isAuthorized_offset;
1224 
1225   static void compute_offsets();
1226  public:
1227   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1228 
1229   static bool is_authorized(Handle context);
1230 
1231   // Debugging/initialization
1232   friend class JavaClasses;
1233 };
1234 
1235 
1236 // Interface to java.lang.ClassLoader objects
1237 
1238 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1239   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1240 
1241 class java_lang_ClassLoader : AllStatic {
1242  private:
1243   // The fake offsets are added by the class loader when java.lang.Class is loaded
1244   enum {
1245    hc_parent_offset = 0
1246   };
1247   static int _loader_data_offset;
1248   static bool offsets_computed;
1249   static int parent_offset;
1250   static int parallelCapable_offset;
1251   static int name_offset;
1252   static int unnamedModule_offset;
1253 
1254  public:
1255   static void compute_offsets();
1256 
1257   static ClassLoaderData** loader_data_addr(oop loader);
1258   static ClassLoaderData* loader_data(oop loader);
1259 
1260   static oop parent(oop loader);
1261   static oop name(oop loader);
1262   static bool isAncestor(oop loader, oop cl);
1263 
1264   // Support for parallelCapable field
1265   static bool parallelCapable(oop the_class_mirror);
1266 
1267   static bool is_trusted_loader(oop loader);
1268 
1269   // Return true if this is one of the class loaders associated with
1270   // the generated bytecodes for reflection.
1271   static bool is_reflection_class_loader(oop loader);
1272 
1273   // Fix for 4474172
1274   static oop  non_reflection_class_loader(oop loader);
1275 
1276   // Testers
1277   static bool is_subclass(Klass* klass) {
1278     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1279   }
1280   static bool is_instance(oop obj);
1281 
1282   static oop unnamedModule(oop loader);
1283 
1284   // Debugging
1285   friend class JavaClasses;
1286   friend class ClassFileParser; // access to number_of_fake_fields
1287 };
1288 
1289 
1290 // Interface to java.lang.System objects
1291 
1292 class java_lang_System : AllStatic {
1293  private:
1294   enum {
1295    hc_static_in_offset  = 0,
1296    hc_static_out_offset = 1,
1297    hc_static_err_offset = 2,
1298    hc_static_security_offset = 3
1299   };
1300 
1301   static int  static_in_offset;
1302   static int static_out_offset;
1303   static int static_err_offset;
1304   static int static_security_offset;
1305 
1306  public:
1307   static int  in_offset_in_bytes();
1308   static int out_offset_in_bytes();
1309   static int err_offset_in_bytes();
1310 
1311   static bool has_security_manager();
1312 
1313   // Debugging
1314   friend class JavaClasses;
1315 };
1316 
1317 
1318 // Interface to java.lang.StackTraceElement objects
1319 
1320 class java_lang_StackTraceElement: AllStatic {
1321  private:
1322   enum {
1323     hc_declaringClassObject_offset    = 0,
1324     hc_classLoaderName_offset      = 1,
1325     hc_moduleName_offset           = 2,
1326     hc_moduleVersion_offset        = 3,
1327     hc_declaringClass_offset       = 4,
1328     hc_methodName_offset           = 5,
1329     hc_fileName_offset             = 6,
1330     hc_lineNumber_offset           = 7
1331   };
1332 
1333   static int declaringClassObject_offset;
1334   static int classLoaderName_offset;
1335   static int moduleName_offset;
1336   static int moduleVersion_offset;
1337   static int declaringClass_offset;
1338   static int methodName_offset;
1339   static int fileName_offset;
1340   static int lineNumber_offset;
1341 
1342   // Setters
1343   static void set_classLoaderName(oop element, oop value);
1344   static void set_moduleName(oop element, oop value);
1345   static void set_moduleVersion(oop element, oop value);
1346   static void set_declaringClass(oop element, oop value);
1347   static void set_methodName(oop element, oop value);
1348   static void set_fileName(oop element, oop value);
1349   static void set_lineNumber(oop element, int value);
1350   static void set_declaringClassObject(oop element, oop value);
1351 
1352  public:
1353   // Create an instance of StackTraceElement
1354   static oop create(const methodHandle& method, int bci, TRAPS);
1355 
1356   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1357                       int version, int bci, Symbol* name, TRAPS);
1358 
1359   // Debugging
1360   friend class JavaClasses;
1361 };
1362 
1363 
1364 class Backtrace: AllStatic {
1365  public:
1366   // Helper backtrace functions to store bci|version together.
1367   static int merge_bci_and_version(int bci, int version);
1368   static int merge_mid_and_cpref(int mid, int cpref);
1369   static int bci_at(unsigned int merged);
1370   static int version_at(unsigned int merged);
1371   static int mid_at(unsigned int merged);
1372   static int cpref_at(unsigned int merged);
1373   static int get_line_number(const methodHandle& method, int bci);
1374   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1375 
1376   // Debugging
1377   friend class JavaClasses;
1378 };
1379 
1380 // Interface to java.lang.StackFrameInfo objects
1381 
1382 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1383   macro(java_lang_StackFrameInfo, version, short_signature, false)
1384 
1385 class java_lang_StackFrameInfo: AllStatic {
1386 private:
1387   static int _declaringClass_offset;
1388   static int _memberName_offset;
1389   static int _bci_offset;
1390   static int _version_offset;
1391 
1392   static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1393 
1394 public:
1395   // Setters
1396   static void set_declaringClass(oop info, oop value);
1397   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS);
1398   static void set_bci(oop info, int value);
1399 
1400   static void set_version(oop info, short value);
1401 
1402   static void compute_offsets();
1403 
1404   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1405 
1406   // Debugging
1407   friend class JavaClasses;
1408 };
1409 
1410 class java_lang_LiveStackFrameInfo: AllStatic {
1411  private:
1412   static int _monitors_offset;
1413   static int _locals_offset;
1414   static int _operands_offset;
1415   static int _mode_offset;
1416 
1417  public:
1418   static void set_monitors(oop info, oop value);
1419   static void set_locals(oop info, oop value);
1420   static void set_operands(oop info, oop value);
1421   static void set_mode(oop info, int value);
1422 
1423   static void compute_offsets();
1424 
1425   // Debugging
1426   friend class JavaClasses;
1427 };
1428 
1429 // Interface to java.lang.AssertionStatusDirectives objects
1430 
1431 class java_lang_AssertionStatusDirectives: AllStatic {
1432  private:
1433   enum {
1434     hc_classes_offset,
1435     hc_classEnabled_offset,
1436     hc_packages_offset,
1437     hc_packageEnabled_offset,
1438     hc_deflt_offset
1439   };
1440 
1441   static int classes_offset;
1442   static int classEnabled_offset;
1443   static int packages_offset;
1444   static int packageEnabled_offset;
1445   static int deflt_offset;
1446 
1447  public:
1448   // Setters
1449   static void set_classes(oop obj, oop val);
1450   static void set_classEnabled(oop obj, oop val);
1451   static void set_packages(oop obj, oop val);
1452   static void set_packageEnabled(oop obj, oop val);
1453   static void set_deflt(oop obj, bool val);
1454   // Debugging
1455   friend class JavaClasses;
1456 };
1457 
1458 
1459 class java_nio_Buffer: AllStatic {
1460  private:
1461   static int _limit_offset;
1462 
1463  public:
1464   static int  limit_offset();
1465   static void compute_offsets();
1466 };
1467 
1468 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1469  private:
1470   static int  _owner_offset;
1471  public:
1472   static void initialize(TRAPS);
1473   static oop  get_owner_threadObj(oop obj);
1474 };
1475 
1476 // Use to declare fields that need to be injected into Java classes
1477 // for the JVM to use.  The name_index and signature_index are
1478 // declared in vmSymbols.  The may_be_java flag is used to declare
1479 // fields that might already exist in Java but should be injected if
1480 // they don't.  Otherwise the field is unconditionally injected and
1481 // the JVM uses the injected one.  This is to ensure that name
1482 // collisions don't occur.  In general may_be_java should be false
1483 // unless there's a good reason.
1484 
1485 class InjectedField {
1486  public:
1487   const SystemDictionary::WKID klass_id;
1488   const vmSymbols::SID name_index;
1489   const vmSymbols::SID signature_index;
1490   const bool           may_be_java;
1491 
1492 
1493   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1494   Symbol* name() const      { return lookup_symbol(name_index); }
1495   Symbol* signature() const { return lookup_symbol(signature_index); }
1496 
1497   int compute_offset();
1498 
1499   // Find the Symbol for this index
1500   static Symbol* lookup_symbol(int symbol_index) {
1501     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1502   }
1503 };
1504 
1505 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1506   klass##_##name##_enum,
1507 
1508 #define ALL_INJECTED_FIELDS(macro)          \
1509   CLASS_INJECTED_FIELDS(macro)              \
1510   CLASSLOADER_INJECTED_FIELDS(macro)        \
1511   RESOLVEDMETHOD_INJECTED_FIELDS(macro)     \
1512   MEMBERNAME_INJECTED_FIELDS(macro)         \
1513   CALLSITECONTEXT_INJECTED_FIELDS(macro)    \
1514   STACKFRAMEINFO_INJECTED_FIELDS(macro)     \
1515   MODULE_INJECTED_FIELDS(macro)
1516 
1517 // Interface to hard-coded offset checking
1518 
1519 class JavaClasses : AllStatic {
1520  private:
1521 
1522   static InjectedField _injected_fields[];
1523 
1524   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1525   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1526   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1527 
1528  public:
1529   enum InjectedFieldID {
1530     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1531     MAX_enum
1532   };
1533 
1534   static int compute_injected_offset(InjectedFieldID id);
1535 
1536   static void compute_hard_coded_offsets();
1537   static void compute_offsets();
1538   static void check_offsets() PRODUCT_RETURN;
1539 
1540   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1541 };
1542 
1543 #undef DECLARE_INJECTED_FIELD_ENUM
1544 
1545 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP