1 /*
   2  * Copyright (c) 1997, 2016, 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 bool has_hash_field()  {
  85     assert(initialized, "Must be initialized");
  86     return (hash_offset > 0);
  87   }
  88   static bool has_coder_field()  {
  89     assert(initialized, "Must be initialized");
  90     return (coder_offset > 0);
  91   }
  92 
  93   static void set_compact_strings(bool value);
  94 
  95   static int value_offset_in_bytes()  {
  96     assert(initialized && (value_offset > 0), "Must be initialized");
  97     return value_offset;
  98   }
  99   static int hash_offset_in_bytes()   {
 100     assert(initialized && (hash_offset > 0), "Must be initialized");
 101     return hash_offset;
 102   }
 103   static int coder_offset_in_bytes()   {
 104     assert(initialized && (coder_offset > 0), "Must be initialized");
 105     return coder_offset;
 106   }
 107 
 108   static inline void set_value_raw(oop string, typeArrayOop buffer);
 109   static inline void set_value(oop string, typeArrayOop buffer);
 110   static inline void set_hash(oop string, unsigned int hash);
 111 
 112   // Accessors
 113   static inline typeArrayOop value(oop java_string);
 114   static inline unsigned int hash(oop java_string);
 115   static inline bool is_latin1(oop java_string);
 116   static inline int length(oop java_string);
 117   static int utf8_length(oop java_string);
 118 
 119   // String converters
 120   static char*  as_utf8_string(oop java_string);
 121   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 122   static char*  as_utf8_string(oop java_string, int start, int len);
 123   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 124   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 125   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 126   // produce an ascii string with all other values quoted using \u####
 127   static char*  as_quoted_ascii(oop java_string);
 128 
 129   // Compute the hash value for a java.lang.String object which would
 130   // contain the characters passed in.
 131   //
 132   // As the hash value used by the String object itself, in
 133   // String.hashCode().  This value is normally calculated in Java code
 134   // in the String.hashCode method(), but is precomputed for String
 135   // objects in the shared archive file.
 136   // hash P(31) from Kernighan & Ritchie
 137   //
 138   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 139   static unsigned int hash_code(const jchar* s, int len) {
 140     unsigned int h = 0;
 141     while (len-- > 0) {
 142       h = 31*h + (unsigned int) *s;
 143       s++;
 144     }
 145     return h;
 146   }
 147 
 148   static unsigned int hash_code(const jbyte* s, int len) {
 149     unsigned int h = 0;
 150     while (len-- > 0) {
 151       h = 31*h + (((unsigned int) *s) & 0xFF);
 152       s++;
 153     }
 154     return h;
 155   }
 156 
 157   static unsigned int hash_code(oop java_string);
 158 
 159   static bool equals(oop java_string, jchar* chars, int len);
 160   static bool equals(oop str1, oop str2);
 161 
 162   // Conversion between '.' and '/' formats
 163   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 164   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 165 
 166   // Conversion
 167   static Symbol* as_symbol(Handle java_string, TRAPS);
 168   static Symbol* as_symbol_or_null(oop java_string);
 169 
 170   // Testers
 171   static bool is_instance(oop obj);
 172   static inline bool is_instance_inlined(oop obj);
 173 
 174   // Debugging
 175   static void print(oop java_string, outputStream* st);
 176   friend class JavaClasses;
 177   friend class StringTable;
 178 };
 179 
 180 
 181 // Interface to java.lang.Class objects
 182 
 183 #define CLASS_INJECTED_FIELDS(macro)                                       \
 184   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 185   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 186   macro(java_lang_Class, oop_size,               int_signature,     false) \
 187   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 188   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 189   macro(java_lang_Class, signers,                object_signature,  false)
 190 
 191 class java_lang_Class : AllStatic {
 192   friend class VMStructs;
 193   friend class JVMCIVMStructs;
 194 
 195  private:
 196   // The fake offsets are added by the class loader when java.lang.Class is loaded
 197 
 198   static int _klass_offset;
 199   static int _array_klass_offset;
 200 
 201   static int _oop_size_offset;
 202   static int _static_oop_field_count_offset;
 203 
 204   static int _protection_domain_offset;
 205   static int _init_lock_offset;
 206   static int _signers_offset;
 207   static int _class_loader_offset;
 208   static int _module_offset;
 209   static int _component_mirror_offset;
 210 
 211   static bool offsets_computed;
 212   static int classRedefinedCount_offset;
 213 
 214   static GrowableArray<Klass*>* _fixup_mirror_list;
 215   static GrowableArray<Klass*>* _fixup_module_field_list;
 216 
 217   static void set_init_lock(oop java_class, oop init_lock);
 218   static void set_protection_domain(oop java_class, oop protection_domain);
 219   static void set_class_loader(oop java_class, oop class_loader);
 220   static void set_component_mirror(oop java_class, oop comp_mirror);
 221   static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
 222  public:
 223   static void compute_offsets();
 224 
 225   // Instance creation
 226   static void create_mirror(KlassHandle k, Handle class_loader, Handle module,
 227                             Handle protection_domain, TRAPS);
 228   static void fixup_mirror(KlassHandle k, TRAPS);
 229   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 230 
 231   static void fixup_module_field(KlassHandle k, Handle module);
 232 
 233   // Conversion
 234   static Klass* as_Klass(oop java_class);
 235   static void set_klass(oop java_class, Klass* klass);
 236   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 237   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 238     Klass* refk_oop = NULL;
 239     BasicType result = as_BasicType(java_class, &refk_oop);
 240     (*reference_klass) = KlassHandle(refk_oop);
 241     return result;
 242   }
 243   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 244   static void print_signature(oop java_class, outputStream *st);
 245   static const char* as_external_name(oop java_class);
 246   // Testing
 247   static bool is_instance(oop obj);
 248 
 249   static bool is_primitive(oop java_class);
 250   static BasicType primitive_type(oop java_class);
 251   static oop primitive_mirror(BasicType t);
 252   // JVM_NewArray support
 253   static Klass* array_klass(oop java_class);
 254   static void set_array_klass(oop java_class, Klass* klass);
 255   // compiler support for class operations
 256   static int klass_offset_in_bytes()                { return _klass_offset; }
 257   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 258   // Support for classRedefinedCount field
 259   static int classRedefinedCount(oop the_class_mirror);
 260   static void set_classRedefinedCount(oop the_class_mirror, int value);
 261 
 262   // Support for embedded per-class oops
 263   static oop  protection_domain(oop java_class);
 264   static oop  init_lock(oop java_class);
 265   static oop  component_mirror(oop java_class);
 266   static objArrayOop  signers(oop java_class);
 267   static void set_signers(oop java_class, objArrayOop signers);
 268 
 269   static oop class_loader(oop java_class);
 270   static void set_module(oop java_class, oop module);
 271   static oop module(oop java_class);
 272 
 273   static int oop_size(oop java_class);
 274   static void set_oop_size(oop java_class, int size);
 275   static int static_oop_field_count(oop java_class);
 276   static void set_static_oop_field_count(oop java_class, int size);
 277 
 278 
 279   static GrowableArray<Klass*>* fixup_mirror_list() {
 280     return _fixup_mirror_list;
 281   }
 282   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 283     _fixup_mirror_list = v;
 284   }
 285 
 286   static GrowableArray<Klass*>* fixup_module_field_list() {
 287     return _fixup_module_field_list;
 288   }
 289   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 290     _fixup_module_field_list = v;
 291   }
 292 
 293   // Debugging
 294   friend class JavaClasses;
 295   friend class InstanceKlass;   // verification code accesses offsets
 296   friend class ClassFileParser; // access to number_of_fake_fields
 297 };
 298 
 299 // Interface to java.lang.Thread objects
 300 
 301 class java_lang_Thread : AllStatic {
 302  private:
 303   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 304   // so we compute the offsets at startup rather than hard-wiring them.
 305   static int _name_offset;
 306   static int _group_offset;
 307   static int _contextClassLoader_offset;
 308   static int _inheritedAccessControlContext_offset;
 309   static int _priority_offset;
 310   static int _eetop_offset;
 311   static int _daemon_offset;
 312   static int _stillborn_offset;
 313   static int _stackSize_offset;
 314   static int _tid_offset;
 315   static int _thread_status_offset;
 316   static int _park_blocker_offset;
 317   static int _park_event_offset ;
 318 
 319   static void compute_offsets();
 320 
 321  public:
 322   // Instance creation
 323   static oop create();
 324   // Returns the JavaThread associated with the thread obj
 325   static JavaThread* thread(oop java_thread);
 326   // Set JavaThread for instance
 327   static void set_thread(oop java_thread, JavaThread* thread);
 328   // Name
 329   static oop name(oop java_thread);
 330   static void set_name(oop java_thread, oop name);
 331   // Priority
 332   static ThreadPriority priority(oop java_thread);
 333   static void set_priority(oop java_thread, ThreadPriority priority);
 334   // Thread group
 335   static oop  threadGroup(oop java_thread);
 336   // Stillborn
 337   static bool is_stillborn(oop java_thread);
 338   static void set_stillborn(oop java_thread);
 339   // Alive (NOTE: this is not really a field, but provides the correct
 340   // definition without doing a Java call)
 341   static bool is_alive(oop java_thread);
 342   // Daemon
 343   static bool is_daemon(oop java_thread);
 344   static void set_daemon(oop java_thread);
 345   // Context ClassLoader
 346   static oop context_class_loader(oop java_thread);
 347   // Control context
 348   static oop inherited_access_control_context(oop java_thread);
 349   // Stack size hint
 350   static jlong stackSize(oop java_thread);
 351   // Thread ID
 352   static jlong thread_id(oop java_thread);
 353 
 354   // Blocker object responsible for thread parking
 355   static oop park_blocker(oop java_thread);
 356 
 357   // Pointer to type-stable park handler, encoded as jlong.
 358   // Should be set when apparently null
 359   // For details, see unsafe.cpp Unsafe_Unpark
 360   static jlong park_event(oop java_thread);
 361   static bool set_park_event(oop java_thread, jlong ptr);
 362 
 363   // Java Thread Status for JVMTI and M&M use.
 364   // This thread status info is saved in threadStatus field of
 365   // java.lang.Thread java class.
 366   enum ThreadStatus {
 367     NEW                      = 0,
 368     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 369                                JVMTI_THREAD_STATE_RUNNABLE,
 370     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 371                                JVMTI_THREAD_STATE_WAITING +
 372                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 373                                JVMTI_THREAD_STATE_SLEEPING,
 374     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 375                                JVMTI_THREAD_STATE_WAITING +
 376                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 377                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 378     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 379                                JVMTI_THREAD_STATE_WAITING +
 380                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 381                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 382     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 383                                JVMTI_THREAD_STATE_WAITING +
 384                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 385                                JVMTI_THREAD_STATE_PARKED,
 386     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 387                                JVMTI_THREAD_STATE_WAITING +
 388                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 389                                JVMTI_THREAD_STATE_PARKED,
 390     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 391                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 392     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 393   };
 394   // Write thread status info to threadStatus field of java.lang.Thread.
 395   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 396   // Read thread status info from threadStatus field of java.lang.Thread.
 397   static ThreadStatus get_thread_status(oop java_thread_oop);
 398 
 399   static const char*  thread_status_name(oop java_thread_oop);
 400 
 401   // Debugging
 402   friend class JavaClasses;
 403 };
 404 
 405 // Interface to java.lang.ThreadGroup objects
 406 
 407 class java_lang_ThreadGroup : AllStatic {
 408  private:
 409   static int _parent_offset;
 410   static int _name_offset;
 411   static int _threads_offset;
 412   static int _groups_offset;
 413   static int _maxPriority_offset;
 414   static int _destroyed_offset;
 415   static int _daemon_offset;
 416   static int _vmAllowSuspension_offset;
 417   static int _nthreads_offset;
 418   static int _ngroups_offset;
 419 
 420   static void compute_offsets();
 421 
 422  public:
 423   // parent ThreadGroup
 424   static oop  parent(oop java_thread_group);
 425   // name
 426   static const char* name(oop java_thread_group);
 427   // ("name as oop" accessor is not necessary)
 428   // Number of threads in group
 429   static int nthreads(oop java_thread_group);
 430   // threads
 431   static objArrayOop threads(oop java_thread_group);
 432   // Number of threads in group
 433   static int ngroups(oop java_thread_group);
 434   // groups
 435   static objArrayOop groups(oop java_thread_group);
 436   // maxPriority in group
 437   static ThreadPriority maxPriority(oop java_thread_group);
 438   // Destroyed
 439   static bool is_destroyed(oop java_thread_group);
 440   // Daemon
 441   static bool is_daemon(oop java_thread_group);
 442   // vmAllowSuspension
 443   static bool is_vmAllowSuspension(oop java_thread_group);
 444   // Debugging
 445   friend class JavaClasses;
 446 };
 447 
 448 
 449 
 450 // Interface to java.lang.Throwable objects
 451 
 452 class java_lang_Throwable: AllStatic {
 453   friend class BacktraceBuilder;
 454   friend class BacktraceIterator;
 455 
 456  private:
 457   // Offsets
 458   enum {
 459     hc_backtrace_offset     =  0,
 460     hc_detailMessage_offset =  1,
 461     hc_cause_offset         =  2,  // New since 1.4
 462     hc_stackTrace_offset    =  3   // New since 1.4
 463   };
 464   enum {
 465       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 466   };
 467   // Trace constants
 468   enum {
 469     trace_methods_offset = 0,
 470     trace_bcis_offset    = 1,
 471     trace_mirrors_offset = 2,
 472     trace_cprefs_offset  = 3,
 473     trace_next_offset    = 4,
 474     trace_size           = 5,
 475     trace_chunk_size     = 32
 476   };
 477 
 478   static int backtrace_offset;
 479   static int detailMessage_offset;
 480   static int stackTrace_offset;
 481   static int depth_offset;
 482   static int static_unassigned_stacktrace_offset;
 483 
 484   // StackTrace (programmatic access, new since 1.4)
 485   static void clear_stacktrace(oop throwable);
 486   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 487   static void set_stacktrace(oop throwable, oop st_element_array);
 488   static oop unassigned_stacktrace();
 489 
 490  public:
 491   // Backtrace
 492   static oop backtrace(oop throwable);
 493   static void set_backtrace(oop throwable, oop value);
 494   static int depth(oop throwable);
 495   static void set_depth(oop throwable, int value);
 496   // Needed by JVMTI to filter out this internal field.
 497   static int get_backtrace_offset() { return backtrace_offset;}
 498   static int get_detailMessage_offset() { return detailMessage_offset;}
 499   // Message
 500   static oop message(Handle throwable);
 501   static void set_message(oop throwable, oop value);
 502   static Symbol* detail_message(oop throwable);
 503   static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
 504   static void print_stack_usage(Handle stream);
 505 
 506   static void compute_offsets();
 507 
 508   // Allocate space for backtrace (created but stack trace not filled in)
 509   static void allocate_backtrace(Handle throwable, TRAPS);
 510   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 511   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 512   // Fill in current stack trace, can cause GC
 513   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 514   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 515   // Programmatic access to stack trace
 516   static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
 517   // Printing
 518   static void print(Handle throwable, outputStream* st);
 519   static void print_stack_trace(Handle throwable, outputStream* st);
 520   static void java_printStackTrace(Handle throwable, TRAPS);
 521   // Debugging
 522   friend class JavaClasses;
 523 };
 524 
 525 
 526 // Interface to java.lang.reflect.AccessibleObject objects
 527 
 528 class java_lang_reflect_AccessibleObject: AllStatic {
 529  private:
 530   // Note that to reduce dependencies on the JDK we compute these
 531   // offsets at run-time.
 532   static int override_offset;
 533 
 534   static void compute_offsets();
 535 
 536  public:
 537   // Accessors
 538   static jboolean override(oop reflect);
 539   static void set_override(oop reflect, jboolean value);
 540 
 541   // Debugging
 542   friend class JavaClasses;
 543 };
 544 
 545 
 546 // Interface to java.lang.reflect.Method objects
 547 
 548 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 549  private:
 550   // Note that to reduce dependencies on the JDK we compute these
 551   // offsets at run-time.
 552   static int clazz_offset;
 553   static int name_offset;
 554   static int returnType_offset;
 555   static int parameterTypes_offset;
 556   static int exceptionTypes_offset;
 557   static int slot_offset;
 558   static int modifiers_offset;
 559   static int signature_offset;
 560   static int annotations_offset;
 561   static int parameter_annotations_offset;
 562   static int annotation_default_offset;
 563   static int type_annotations_offset;
 564 
 565   static void compute_offsets();
 566 
 567  public:
 568   // Allocation
 569   static Handle create(TRAPS);
 570 
 571   // Accessors
 572   static oop clazz(oop reflect);
 573   static void set_clazz(oop reflect, oop value);
 574 
 575   static oop name(oop method);
 576   static void set_name(oop method, oop value);
 577 
 578   static oop return_type(oop method);
 579   static void set_return_type(oop method, oop value);
 580 
 581   static oop parameter_types(oop method);
 582   static void set_parameter_types(oop method, oop value);
 583 
 584   static oop exception_types(oop method);
 585   static void set_exception_types(oop method, oop value);
 586 
 587   static int slot(oop reflect);
 588   static void set_slot(oop reflect, int value);
 589 
 590   static int modifiers(oop method);
 591   static void set_modifiers(oop method, int value);
 592 
 593   static bool has_signature_field();
 594   static oop signature(oop method);
 595   static void set_signature(oop method, oop value);
 596 
 597   static bool has_annotations_field();
 598   static oop annotations(oop method);
 599   static void set_annotations(oop method, oop value);
 600 
 601   static bool has_parameter_annotations_field();
 602   static oop parameter_annotations(oop method);
 603   static void set_parameter_annotations(oop method, oop value);
 604 
 605   static bool has_annotation_default_field();
 606   static oop annotation_default(oop method);
 607   static void set_annotation_default(oop method, oop value);
 608 
 609   static bool has_type_annotations_field();
 610   static oop type_annotations(oop method);
 611   static void set_type_annotations(oop method, oop value);
 612 
 613   // Debugging
 614   friend class JavaClasses;
 615 };
 616 
 617 
 618 // Interface to java.lang.reflect.Constructor objects
 619 
 620 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 621  private:
 622   // Note that to reduce dependencies on the JDK we compute these
 623   // offsets at run-time.
 624   static int clazz_offset;
 625   static int parameterTypes_offset;
 626   static int exceptionTypes_offset;
 627   static int slot_offset;
 628   static int modifiers_offset;
 629   static int signature_offset;
 630   static int annotations_offset;
 631   static int parameter_annotations_offset;
 632   static int type_annotations_offset;
 633 
 634   static void compute_offsets();
 635 
 636  public:
 637   // Allocation
 638   static Handle create(TRAPS);
 639 
 640   // Accessors
 641   static oop clazz(oop reflect);
 642   static void set_clazz(oop reflect, oop value);
 643 
 644   static oop parameter_types(oop constructor);
 645   static void set_parameter_types(oop constructor, oop value);
 646 
 647   static oop exception_types(oop constructor);
 648   static void set_exception_types(oop constructor, oop value);
 649 
 650   static int slot(oop reflect);
 651   static void set_slot(oop reflect, int value);
 652 
 653   static int modifiers(oop constructor);
 654   static void set_modifiers(oop constructor, int value);
 655 
 656   static bool has_signature_field();
 657   static oop signature(oop constructor);
 658   static void set_signature(oop constructor, oop value);
 659 
 660   static bool has_annotations_field();
 661   static oop annotations(oop constructor);
 662   static void set_annotations(oop constructor, oop value);
 663 
 664   static bool has_parameter_annotations_field();
 665   static oop parameter_annotations(oop method);
 666   static void set_parameter_annotations(oop method, oop value);
 667 
 668   static bool has_type_annotations_field();
 669   static oop type_annotations(oop constructor);
 670   static void set_type_annotations(oop constructor, oop value);
 671 
 672   // Debugging
 673   friend class JavaClasses;
 674 };
 675 
 676 
 677 // Interface to java.lang.reflect.Field objects
 678 
 679 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 680  private:
 681   // Note that to reduce dependencies on the JDK we compute these
 682   // offsets at run-time.
 683   static int clazz_offset;
 684   static int name_offset;
 685   static int type_offset;
 686   static int slot_offset;
 687   static int modifiers_offset;
 688   static int signature_offset;
 689   static int annotations_offset;
 690   static int type_annotations_offset;
 691 
 692   static void compute_offsets();
 693 
 694  public:
 695   // Allocation
 696   static Handle create(TRAPS);
 697 
 698   // Accessors
 699   static oop clazz(oop reflect);
 700   static void set_clazz(oop reflect, oop value);
 701 
 702   static oop name(oop field);
 703   static void set_name(oop field, oop value);
 704 
 705   static oop type(oop field);
 706   static void set_type(oop field, oop value);
 707 
 708   static int slot(oop reflect);
 709   static void set_slot(oop reflect, int value);
 710 
 711   static int modifiers(oop field);
 712   static void set_modifiers(oop field, int value);
 713 
 714   static bool has_signature_field();
 715   static oop signature(oop constructor);
 716   static void set_signature(oop constructor, oop value);
 717 
 718   static bool has_annotations_field();
 719   static oop annotations(oop constructor);
 720   static void set_annotations(oop constructor, oop value);
 721 
 722   static bool has_parameter_annotations_field();
 723   static oop parameter_annotations(oop method);
 724   static void set_parameter_annotations(oop method, oop value);
 725 
 726   static bool has_annotation_default_field();
 727   static oop annotation_default(oop method);
 728   static void set_annotation_default(oop method, oop value);
 729 
 730   static bool has_type_annotations_field();
 731   static oop type_annotations(oop field);
 732   static void set_type_annotations(oop field, oop value);
 733 
 734   // Debugging
 735   friend class JavaClasses;
 736 };
 737 
 738 class java_lang_reflect_Parameter {
 739  private:
 740   // Note that to reduce dependencies on the JDK we compute these
 741   // offsets at run-time.
 742   static int name_offset;
 743   static int modifiers_offset;
 744   static int index_offset;
 745   static int executable_offset;
 746 
 747   static void compute_offsets();
 748 
 749  public:
 750   // Allocation
 751   static Handle create(TRAPS);
 752 
 753   // Accessors
 754   static oop name(oop field);
 755   static void set_name(oop field, oop value);
 756 
 757   static int index(oop reflect);
 758   static void set_index(oop reflect, int value);
 759 
 760   static int modifiers(oop reflect);
 761   static void set_modifiers(oop reflect, int value);
 762 
 763   static oop executable(oop constructor);
 764   static void set_executable(oop constructor, oop value);
 765 
 766   friend class JavaClasses;
 767 };
 768 
 769 #define MODULE_INJECTED_FIELDS(macro)                            \
 770   macro(java_lang_reflect_Module, module_entry, intptr_signature, false)
 771 
 772 class java_lang_reflect_Module {
 773   private:
 774     static int loader_offset;
 775     static int name_offset;
 776     static int _module_entry_offset;
 777     static void compute_offsets();
 778 
 779   public:
 780     // Allocation
 781     static Handle create(Handle loader, Handle module_name, TRAPS);
 782 
 783     // Testers
 784     static bool is_subclass(Klass* klass) {
 785       return klass->is_subclass_of(SystemDictionary::reflect_Module_klass());
 786     }
 787     static bool is_instance(oop obj);
 788 
 789     // Accessors
 790     static oop loader(oop module);
 791     static void set_loader(oop module, oop value);
 792 
 793     static oop name(oop module);
 794     static void set_name(oop module, oop value);
 795 
 796     static ModuleEntry* module_entry(oop module, TRAPS);
 797     static void set_module_entry(oop module, ModuleEntry* module_entry);
 798 
 799   friend class JavaClasses;
 800 };
 801 
 802 // Interface to jdk.internal.reflect.ConstantPool objects
 803 class reflect_ConstantPool {
 804  private:
 805   // Note that to reduce dependencies on the JDK we compute these
 806   // offsets at run-time.
 807   static int _oop_offset;
 808 
 809   static void compute_offsets();
 810 
 811  public:
 812   // Allocation
 813   static Handle create(TRAPS);
 814 
 815   // Accessors
 816   static void set_cp(oop reflect, ConstantPool* value);
 817   static int oop_offset() {
 818     return _oop_offset;
 819   }
 820 
 821   static ConstantPool* get_cp(oop reflect);
 822 
 823   // Debugging
 824   friend class JavaClasses;
 825 };
 826 
 827 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
 828 class reflect_UnsafeStaticFieldAccessorImpl {
 829  private:
 830   static int _base_offset;
 831   static void compute_offsets();
 832 
 833  public:
 834   static int base_offset() {
 835     return _base_offset;
 836   }
 837 
 838   // Debugging
 839   friend class JavaClasses;
 840 };
 841 
 842 // Interface to java.lang primitive type boxing objects:
 843 //  - java.lang.Boolean
 844 //  - java.lang.Character
 845 //  - java.lang.Float
 846 //  - java.lang.Double
 847 //  - java.lang.Byte
 848 //  - java.lang.Short
 849 //  - java.lang.Integer
 850 //  - java.lang.Long
 851 
 852 // This could be separated out into 8 individual classes.
 853 
 854 class java_lang_boxing_object: AllStatic {
 855  private:
 856   enum {
 857    hc_value_offset = 0
 858   };
 859   static int value_offset;
 860   static int long_value_offset;
 861 
 862   static oop initialize_and_allocate(BasicType type, TRAPS);
 863  public:
 864   // Allocation. Returns a boxed value, or NULL for invalid type.
 865   static oop create(BasicType type, jvalue* value, TRAPS);
 866   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 867   static BasicType get_value(oop box, jvalue* value);
 868   static BasicType set_value(oop box, jvalue* value);
 869   static BasicType basic_type(oop box);
 870   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 871   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 872   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 873   static void print(BasicType type, jvalue* value, outputStream* st);
 874 
 875   static int value_offset_in_bytes(BasicType type) {
 876     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 877                                                     value_offset;
 878   }
 879 
 880   // Debugging
 881   friend class JavaClasses;
 882 };
 883 
 884 
 885 
 886 // Interface to java.lang.ref.Reference objects
 887 
 888 class java_lang_ref_Reference: AllStatic {
 889  public:
 890   enum {
 891    hc_referent_offset   = 0,
 892    hc_queue_offset      = 1,
 893    hc_next_offset       = 2,
 894    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 895   };
 896   enum {
 897    hc_static_lock_offset    = 0,
 898    hc_static_pending_offset = 1
 899   };
 900 
 901   static int referent_offset;
 902   static int queue_offset;
 903   static int next_offset;
 904   static int discovered_offset;
 905   static int static_lock_offset;
 906   static int static_pending_offset;
 907   static int number_of_fake_oop_fields;
 908 
 909   // Accessors
 910   static inline oop referent(oop ref);
 911   static inline void set_referent(oop ref, oop value);
 912   static inline void set_referent_raw(oop ref, oop value);
 913   static inline HeapWord* referent_addr(oop ref);
 914   static inline oop next(oop ref);
 915   static inline void set_next(oop ref, oop value);
 916   static inline void set_next_raw(oop ref, oop value);
 917   static inline HeapWord* next_addr(oop ref);
 918   static inline oop discovered(oop ref);
 919   static inline void set_discovered(oop ref, oop value);
 920   static inline void set_discovered_raw(oop ref, oop value);
 921   static inline HeapWord* discovered_addr(oop ref);
 922 
 923   // Accessors for statics
 924   static oop  pending_list_lock();
 925   static oop  pending_list();
 926 
 927   static HeapWord*  pending_list_lock_addr();
 928   static HeapWord*  pending_list_addr();
 929 };
 930 
 931 
 932 // Interface to java.lang.ref.SoftReference objects
 933 
 934 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 935  public:
 936   enum {
 937    // The timestamp is a long field and may need to be adjusted for alignment.
 938    hc_timestamp_offset  = hc_discovered_offset + 1
 939   };
 940   enum {
 941    hc_static_clock_offset = 0
 942   };
 943 
 944   static int timestamp_offset;
 945   static int static_clock_offset;
 946 
 947   // Accessors
 948   static jlong timestamp(oop ref);
 949 
 950   // Accessors for statics
 951   static jlong clock();
 952   static void set_clock(jlong value);
 953 };
 954 
 955 // Interface to java.lang.invoke.MethodHandle objects
 956 
 957 class MethodHandleEntry;
 958 
 959 class java_lang_invoke_MethodHandle: AllStatic {
 960   friend class JavaClasses;
 961 
 962  private:
 963   static int _type_offset;               // the MethodType of this MH
 964   static int _form_offset;               // the LambdaForm of this MH
 965 
 966   static void compute_offsets();
 967 
 968  public:
 969   // Accessors
 970   static oop            type(oop mh);
 971   static void       set_type(oop mh, oop mtype);
 972 
 973   static oop            form(oop mh);
 974   static void       set_form(oop mh, oop lform);
 975 
 976   // Testers
 977   static bool is_subclass(Klass* klass) {
 978     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 979   }
 980   static bool is_instance(oop obj);
 981 
 982   // Accessors for code generation:
 983   static int type_offset_in_bytes()             { return _type_offset; }
 984   static int form_offset_in_bytes()             { return _form_offset; }
 985 };
 986 
 987 // Interface to java.lang.invoke.DirectMethodHandle objects
 988 
 989 class java_lang_invoke_DirectMethodHandle: AllStatic {
 990   friend class JavaClasses;
 991 
 992  private:
 993   static int _member_offset;               // the MemberName of this DMH
 994 
 995   static void compute_offsets();
 996 
 997  public:
 998   // Accessors
 999   static oop  member(oop mh);
1000 
1001   // Testers
1002   static bool is_subclass(Klass* klass) {
1003     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1004   }
1005   static bool is_instance(oop obj);
1006 
1007   // Accessors for code generation:
1008   static int member_offset_in_bytes()           { return _member_offset; }
1009 };
1010 
1011 // Interface to java.lang.invoke.LambdaForm objects
1012 // (These are a private interface for managing adapter code generation.)
1013 
1014 class java_lang_invoke_LambdaForm: AllStatic {
1015   friend class JavaClasses;
1016 
1017  private:
1018   static int _vmentry_offset;  // type is MemberName
1019 
1020   static void compute_offsets();
1021 
1022  public:
1023   // Accessors
1024   static oop            vmentry(oop lform);
1025   static void       set_vmentry(oop lform, oop invoker);
1026 
1027   // Testers
1028   static bool is_subclass(Klass* klass) {
1029     return SystemDictionary::LambdaForm_klass() != NULL &&
1030       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1031   }
1032   static bool is_instance(oop obj);
1033 
1034   // Accessors for code generation:
1035   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1036 };
1037 
1038 
1039 // Interface to java.lang.invoke.MemberName objects
1040 // (These are a private interface for Java code to query the class hierarchy.)
1041 
1042 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1043   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1044   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1045   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1046 
1047 class java_lang_invoke_MemberName: AllStatic {
1048   friend class JavaClasses;
1049 
1050  private:
1051   // From java.lang.invoke.MemberName:
1052   //    private Class<?>   clazz;       // class in which the method is defined
1053   //    private String     name;        // may be null if not yet materialized
1054   //    private Object     type;        // may be null if not yet materialized
1055   //    private int        flags;       // modifier bits; see reflect.Modifier
1056   //    private intptr     vmtarget;    // VM-specific target value
1057   //    private intptr_t   vmindex;     // member index within class or interface
1058   static int _clazz_offset;
1059   static int _name_offset;
1060   static int _type_offset;
1061   static int _flags_offset;
1062   static int _vmtarget_offset;
1063   static int _vmloader_offset;
1064   static int _vmindex_offset;
1065 
1066   static void compute_offsets();
1067 
1068  public:
1069   // Accessors
1070   static oop            clazz(oop mname);
1071   static void       set_clazz(oop mname, oop clazz);
1072 
1073   static oop            type(oop mname);
1074   static void       set_type(oop mname, oop type);
1075 
1076   static oop            name(oop mname);
1077   static void       set_name(oop mname, oop name);
1078 
1079   static int            flags(oop mname);
1080   static void       set_flags(oop mname, int flags);
1081 
1082   static Metadata*      vmtarget(oop mname);
1083   static void       set_vmtarget(oop mname, Metadata* target);
1084 
1085   static intptr_t       vmindex(oop mname);
1086   static void       set_vmindex(oop mname, intptr_t index);
1087 
1088   // Testers
1089   static bool is_subclass(Klass* klass) {
1090     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1091   }
1092   static bool is_instance(oop obj);
1093 
1094   static bool is_method(oop obj);
1095 
1096   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1097   enum {
1098     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1099     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1100     MN_IS_FIELD             = 0x00040000, // field
1101     MN_IS_TYPE              = 0x00080000, // nested type
1102     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1103     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1104     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1105     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1106     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1107     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1108   };
1109 
1110   // Accessors for code generation:
1111   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1112   static int type_offset_in_bytes()             { return _type_offset; }
1113   static int name_offset_in_bytes()             { return _name_offset; }
1114   static int flags_offset_in_bytes()            { return _flags_offset; }
1115   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1116   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1117 
1118   static bool equals(oop mt1, oop mt2);
1119 };
1120 
1121 
1122 // Interface to java.lang.invoke.MethodType objects
1123 
1124 class java_lang_invoke_MethodType: AllStatic {
1125   friend class JavaClasses;
1126 
1127  private:
1128   static int _rtype_offset;
1129   static int _ptypes_offset;
1130 
1131   static void compute_offsets();
1132 
1133  public:
1134   // Accessors
1135   static oop            rtype(oop mt);
1136   static objArrayOop    ptypes(oop mt);
1137 
1138   static oop            ptype(oop mt, int index);
1139   static int            ptype_count(oop mt);
1140 
1141   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1142   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1143 
1144   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1145   static void           print_signature(oop mt, outputStream* st);
1146 
1147   static bool is_instance(oop obj);
1148 
1149   static bool equals(oop mt1, oop mt2);
1150 
1151   // Accessors for code generation:
1152   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1153   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1154 };
1155 
1156 
1157 // Interface to java.lang.invoke.CallSite objects
1158 
1159 class java_lang_invoke_CallSite: AllStatic {
1160   friend class JavaClasses;
1161 
1162 private:
1163   static int _target_offset;
1164   static int _context_offset;
1165 
1166   static void compute_offsets();
1167 
1168 public:
1169   // Accessors
1170   static oop              target(          oop site);
1171   static void         set_target(          oop site, oop target);
1172   static void         set_target_volatile( oop site, oop target);
1173 
1174   static oop              context(oop site);
1175 
1176   // Testers
1177   static bool is_subclass(Klass* klass) {
1178     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1179   }
1180   static bool is_instance(oop obj);
1181 
1182   // Accessors for code generation:
1183   static int target_offset_in_bytes()           { return _target_offset; }
1184 };
1185 
1186 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1187 
1188 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1189   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1190 
1191 class DependencyContext;
1192 
1193 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1194   friend class JavaClasses;
1195 
1196 private:
1197   static int _vmdependencies_offset;
1198 
1199   static void compute_offsets();
1200 
1201 public:
1202   // Accessors
1203   static DependencyContext vmdependencies(oop context);
1204 
1205   // Testers
1206   static bool is_subclass(Klass* klass) {
1207     return klass->is_subclass_of(SystemDictionary::Context_klass());
1208   }
1209   static bool is_instance(oop obj);
1210 };
1211 
1212 // Interface to java.security.AccessControlContext objects
1213 
1214 class java_security_AccessControlContext: AllStatic {
1215  private:
1216   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1217   // so we compute the offsets at startup rather than hard-wiring them.
1218   static int _context_offset;
1219   static int _privilegedContext_offset;
1220   static int _isPrivileged_offset;
1221   static int _isAuthorized_offset;
1222 
1223   static void compute_offsets();
1224  public:
1225   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1226 
1227   static bool is_authorized(Handle context);
1228 
1229   // Debugging/initialization
1230   friend class JavaClasses;
1231 };
1232 
1233 
1234 // Interface to java.lang.ClassLoader objects
1235 
1236 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1237   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1238 
1239 class java_lang_ClassLoader : AllStatic {
1240  private:
1241   // The fake offsets are added by the class loader when java.lang.Class is loaded
1242   enum {
1243    hc_parent_offset = 0
1244   };
1245   static int _loader_data_offset;
1246   static bool offsets_computed;
1247   static int parent_offset;
1248   static int parallelCapable_offset;
1249   static int unnamedModule_offset;
1250 
1251  public:
1252   static void compute_offsets();
1253 
1254   static ClassLoaderData** loader_data_addr(oop loader);
1255   static ClassLoaderData* loader_data(oop loader);
1256 
1257   static oop parent(oop loader);
1258   static bool isAncestor(oop loader, oop cl);
1259 
1260   // Support for parallelCapable field
1261   static bool parallelCapable(oop the_class_mirror);
1262 
1263   static bool is_trusted_loader(oop loader);
1264 
1265   // Fix for 4474172
1266   static oop  non_reflection_class_loader(oop loader);
1267 
1268   // Testers
1269   static bool is_subclass(Klass* klass) {
1270     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1271   }
1272   static bool is_instance(oop obj);
1273 
1274   static oop unnamedModule(oop loader);
1275 
1276   // Debugging
1277   friend class JavaClasses;
1278   friend class ClassFileParser; // access to number_of_fake_fields
1279 };
1280 
1281 
1282 // Interface to java.lang.System objects
1283 
1284 class java_lang_System : AllStatic {
1285  private:
1286   enum {
1287    hc_static_in_offset  = 0,
1288    hc_static_out_offset = 1,
1289    hc_static_err_offset = 2,
1290    hc_static_security_offset = 3
1291   };
1292 
1293   static int  static_in_offset;
1294   static int static_out_offset;
1295   static int static_err_offset;
1296   static int static_security_offset;
1297 
1298  public:
1299   static int  in_offset_in_bytes();
1300   static int out_offset_in_bytes();
1301   static int err_offset_in_bytes();
1302 
1303   static bool has_security_manager();
1304 
1305   // Debugging
1306   friend class JavaClasses;
1307 };
1308 
1309 
1310 // Interface to java.lang.StackTraceElement objects
1311 
1312 class java_lang_StackTraceElement: AllStatic {
1313  private:
1314   enum {
1315     hc_moduleName_offset = 0,
1316     hc_moduleVersion_offset = 1,
1317     hc_declaringClass_offset = 2,
1318     hc_methodName_offset = 3,
1319     hc_fileName_offset   = 4,
1320     hc_lineNumber_offset = 5
1321   };
1322 
1323   static int moduleName_offset;
1324   static int moduleVersion_offset;
1325   static int declaringClass_offset;
1326   static int methodName_offset;
1327   static int fileName_offset;
1328   static int lineNumber_offset;
1329 
1330   // Setters
1331   static void set_moduleName(oop element, oop value);
1332   static void set_moduleVersion(oop element, oop value);
1333   static void set_declaringClass(oop element, oop value);
1334   static void set_methodName(oop element, oop value);
1335   static void set_fileName(oop element, oop value);
1336   static void set_lineNumber(oop element, int value);
1337 
1338  public:
1339   // Create an instance of StackTraceElement
1340   static oop create(const methodHandle& method, int bci, TRAPS);
1341 
1342   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1343                       int version, int bci, int cpref, TRAPS);
1344 
1345   // Debugging
1346   friend class JavaClasses;
1347 };
1348 
1349 
1350 class Backtrace: AllStatic {
1351  public:
1352   // Helper backtrace functions to store bci|version together.
1353   static int merge_bci_and_version(int bci, int version);
1354   static int merge_mid_and_cpref(int mid, int cpref);
1355   static int bci_at(unsigned int merged);
1356   static int version_at(unsigned int merged);
1357   static int mid_at(unsigned int merged);
1358   static int cpref_at(unsigned int merged);
1359   static int get_line_number(const methodHandle& method, int bci);
1360   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1361 
1362   // Debugging
1363   friend class JavaClasses;
1364 };
1365 
1366 // Interface to java.lang.StackFrameInfo objects
1367 
1368 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1369   macro(java_lang_StackFrameInfo, version, short_signature, false)
1370 
1371 class java_lang_StackFrameInfo: AllStatic {
1372 private:
1373   static int _declaringClass_offset;
1374   static int _memberName_offset;
1375   static int _bci_offset;
1376   static int _version_offset;
1377 
1378   static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1379 
1380 public:
1381   // Setters
1382   static void set_declaringClass(oop info, oop value);
1383   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1384   static void set_bci(oop info, int value);
1385 
1386   static void set_version(oop info, short value);
1387 
1388   static void compute_offsets();
1389 
1390   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1391 
1392   // Debugging
1393   friend class JavaClasses;
1394 };
1395 
1396 class java_lang_LiveStackFrameInfo: AllStatic {
1397  private:
1398   static int _monitors_offset;
1399   static int _locals_offset;
1400   static int _operands_offset;
1401 
1402  public:
1403   static void set_monitors(oop info, oop value);
1404   static void set_locals(oop info, oop value);
1405   static void set_operands(oop info, oop value);
1406 
1407   static void compute_offsets();
1408 
1409   // Debugging
1410   friend class JavaClasses;
1411 };
1412 
1413 // Interface to java.lang.AssertionStatusDirectives objects
1414 
1415 class java_lang_AssertionStatusDirectives: AllStatic {
1416  private:
1417   enum {
1418     hc_classes_offset,
1419     hc_classEnabled_offset,
1420     hc_packages_offset,
1421     hc_packageEnabled_offset,
1422     hc_deflt_offset
1423   };
1424 
1425   static int classes_offset;
1426   static int classEnabled_offset;
1427   static int packages_offset;
1428   static int packageEnabled_offset;
1429   static int deflt_offset;
1430 
1431  public:
1432   // Setters
1433   static void set_classes(oop obj, oop val);
1434   static void set_classEnabled(oop obj, oop val);
1435   static void set_packages(oop obj, oop val);
1436   static void set_packageEnabled(oop obj, oop val);
1437   static void set_deflt(oop obj, bool val);
1438   // Debugging
1439   friend class JavaClasses;
1440 };
1441 
1442 
1443 class java_nio_Buffer: AllStatic {
1444  private:
1445   static int _limit_offset;
1446 
1447  public:
1448   static int  limit_offset();
1449   static void compute_offsets();
1450 };
1451 
1452 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1453  private:
1454   static int  _owner_offset;
1455  public:
1456   static void initialize(TRAPS);
1457   static oop  get_owner_threadObj(oop obj);
1458 };
1459 
1460 // Use to declare fields that need to be injected into Java classes
1461 // for the JVM to use.  The name_index and signature_index are
1462 // declared in vmSymbols.  The may_be_java flag is used to declare
1463 // fields that might already exist in Java but should be injected if
1464 // they don't.  Otherwise the field is unconditionally injected and
1465 // the JVM uses the injected one.  This is to ensure that name
1466 // collisions don't occur.  In general may_be_java should be false
1467 // unless there's a good reason.
1468 
1469 class InjectedField {
1470  public:
1471   const SystemDictionary::WKID klass_id;
1472   const vmSymbols::SID name_index;
1473   const vmSymbols::SID signature_index;
1474   const bool           may_be_java;
1475 
1476 
1477   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1478   Symbol* name() const      { return lookup_symbol(name_index); }
1479   Symbol* signature() const { return lookup_symbol(signature_index); }
1480 
1481   int compute_offset();
1482 
1483   // Find the Symbol for this index
1484   static Symbol* lookup_symbol(int symbol_index) {
1485     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1486   }
1487 };
1488 
1489 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1490   klass##_##name##_enum,
1491 
1492 #define ALL_INJECTED_FIELDS(macro)          \
1493   CLASS_INJECTED_FIELDS(macro)              \
1494   CLASSLOADER_INJECTED_FIELDS(macro)        \
1495   MEMBERNAME_INJECTED_FIELDS(macro)         \
1496   CALLSITECONTEXT_INJECTED_FIELDS(macro)    \
1497   STACKFRAMEINFO_INJECTED_FIELDS(macro)     \
1498   MODULE_INJECTED_FIELDS(macro)
1499 
1500 // Interface to hard-coded offset checking
1501 
1502 class JavaClasses : AllStatic {
1503  private:
1504 
1505   static InjectedField _injected_fields[];
1506 
1507   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1508   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1509   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1510 
1511  public:
1512   enum InjectedFieldID {
1513     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1514     MAX_enum
1515   };
1516 
1517   static int compute_injected_offset(InjectedFieldID id);
1518 
1519   static void compute_hard_coded_offsets();
1520   static void compute_offsets();
1521   static void check_offsets() PRODUCT_RETURN;
1522 
1523   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1524 };
1525 
1526 #undef DECLARE_INJECTED_FIELD_ENUM
1527 
1528 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP