1 /*
   2  * Copyright (c) 1997, 2018, 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 offset_offset;
  57   static int count_offset;
  58   static int hash_offset;
  59 
  60   static bool initialized;
  61 
  62   static Handle basic_create(int length, TRAPS);
  63 
  64   static void set_offset(oop string, int offset) {
  65     assert(initialized, "Must be initialized");
  66     if (offset_offset > 0) {
  67       string->int_field_put(offset_offset, offset);
  68     }
  69   }
  70   static void set_count( oop string, int count) {
  71     assert(initialized, "Must be initialized");
  72     if (count_offset > 0) {
  73       string->int_field_put(count_offset,  count);
  74     }
  75   }
  76 
  77  public:
  78   static void compute_offsets();
  79 
  80   // Instance creation
  81   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  82   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  83   static Handle create_from_str(const char* utf8_str, TRAPS);
  84   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  85   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  86   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  87   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  88 
  89   static bool has_offset_field()  {
  90     assert(initialized, "Must be initialized");
  91     return (offset_offset > 0);
  92   }
  93 
  94   static bool has_count_field()  {
  95     assert(initialized, "Must be initialized");
  96     return (count_offset > 0);
  97   }
  98 
  99   static bool has_hash_field()  {
 100     assert(initialized, "Must be initialized");
 101     return (hash_offset > 0);
 102   }
 103 
 104   static int value_offset_in_bytes()  {
 105     assert(initialized && (value_offset > 0), "Must be initialized");
 106     return value_offset;
 107   }
 108   static int count_offset_in_bytes()  {
 109     assert(initialized && (count_offset > 0), "Must be initialized");
 110     return count_offset;
 111   }
 112   static int offset_offset_in_bytes() {
 113     assert(initialized && (offset_offset > 0), "Must be initialized");
 114     return offset_offset;
 115   }
 116   static int hash_offset_in_bytes()   {
 117     assert(initialized && (hash_offset > 0), "Must be initialized");
 118     return hash_offset;
 119   }
 120 
 121   static void set_value(oop string, typeArrayOop buffer) {
 122     assert(initialized && (value_offset > 0), "Must be initialized");
 123     string->obj_field_put(value_offset, (oop)buffer);
 124   }
 125   static void set_hash(oop string, unsigned int hash) {
 126     assert(initialized && (hash_offset > 0), "Must be initialized");
 127     string->int_field_put(hash_offset, hash);
 128   }
 129 
 130   // Accessors
 131   static typeArrayOop value(oop java_string) {
 132     assert(initialized && (value_offset > 0), "Must be initialized");
 133     assert(is_instance(java_string), "must be java_string");
 134     return (typeArrayOop) java_string->obj_field(value_offset);
 135   }
 136   static unsigned int hash(oop java_string) {
 137     assert(initialized && (hash_offset > 0), "Must be initialized");
 138     assert(is_instance(java_string), "must be java_string");
 139     return java_string->int_field(hash_offset);
 140   }
 141   static int offset(oop java_string) {
 142     assert(initialized, "Must be initialized");
 143     assert(is_instance(java_string), "must be java_string");
 144     if (offset_offset > 0) {
 145       return java_string->int_field(offset_offset);
 146     } else {
 147       return 0;
 148     }
 149   }
 150   static int length(oop java_string) {
 151     assert(initialized, "Must be initialized");
 152     assert(is_instance(java_string), "must be java_string");
 153     if (count_offset > 0) {
 154       return java_string->int_field(count_offset);
 155     } else {
 156       return ((typeArrayOop)java_string->obj_field(value_offset))->length();
 157     }
 158   }
 159   static int utf8_length(oop java_string);
 160 
 161   // String converters
 162   static char*  as_utf8_string(oop java_string);
 163   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 164   static char*  as_utf8_string(oop java_string, int start, int len);
 165   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 166   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 167   // produce an ascii string with all other values quoted using \u####
 168   static char*  as_quoted_ascii(oop java_string);
 169 
 170   // Compute the hash value for a java.lang.String object which would
 171   // contain the characters passed in.
 172   //
 173   // As the hash value used by the String object itself, in
 174   // String.hashCode().  This value is normally calculated in Java code
 175   // in the String.hashCode method(), but is precomputed for String
 176   // objects in the shared archive file.
 177   // hash P(31) from Kernighan & Ritchie
 178   //
 179   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 180   template <typename T> static unsigned int hash_code(T* s, int len) {
 181     unsigned int h = 0;
 182     while (len-- > 0) {
 183       h = 31*h + (unsigned int) *s;
 184       s++;
 185     }
 186     return h;
 187   }
 188   static unsigned int hash_code(oop java_string);
 189 
 190   // This is the string hash code used by the StringTable, which may be
 191   // the same as String.hashCode or an alternate hash code.
 192   static unsigned int hash_string(oop java_string);
 193 
 194   static bool equals(oop java_string, jchar* chars, int len);
 195   static bool equals(oop str1, oop str2);
 196 
 197   // Conversion between '.' and '/' formats
 198   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 199   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 200 
 201   // Conversion
 202   static Symbol* as_symbol(Handle java_string, TRAPS);
 203   static Symbol* as_symbol_or_null(oop java_string);
 204 
 205   // Testers
 206   static bool is_instance(oop obj) {
 207     return obj != NULL && obj->klass() == SystemDictionary::String_klass();
 208   }
 209 
 210   // Debugging
 211   static void print(oop java_string, outputStream* st);
 212   friend class JavaClasses;
 213 };
 214 
 215 
 216 // Interface to java.lang.Class objects
 217 
 218 #define CLASS_INJECTED_FIELDS(macro)                                       \
 219   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 220   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 221   macro(java_lang_Class, oop_size,               int_signature,     false) \
 222   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 223   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 224   macro(java_lang_Class, init_lock,              object_signature,  false) \
 225   macro(java_lang_Class, signers,                object_signature,  false)
 226 
 227 class java_lang_Class : AllStatic {
 228   friend class VMStructs;
 229 
 230  private:
 231   // The fake offsets are added by the class loader when java.lang.Class is loaded
 232 
 233   static int _klass_offset;
 234   static int _array_klass_offset;
 235 
 236   static int _oop_size_offset;
 237   static int _static_oop_field_count_offset;
 238 
 239   static int _protection_domain_offset;
 240   static int _init_lock_offset;
 241   static int _signers_offset;
 242   static int _class_loader_offset;
 243 
 244   static bool offsets_computed;
 245   static int classRedefinedCount_offset;
 246 
 247   static GrowableArray<Klass*>* _fixup_mirror_list;
 248 
 249   static void set_init_lock(oop java_class, oop init_lock);
 250   static void set_protection_domain(oop java_class, oop protection_domain);
 251   static void set_class_loader(oop java_class, oop class_loader);
 252   static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
 253  public:
 254   static void compute_offsets();
 255 
 256   // Instance creation
 257   static void create_mirror(KlassHandle k, Handle class_loader,
 258                             Handle protection_domain, TRAPS);
 259   static void fixup_mirror(KlassHandle k, TRAPS);
 260   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 261   // Conversion
 262   static Klass* as_Klass(oop java_class);
 263   static void set_klass(oop java_class, Klass* klass);
 264   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 265   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 266     Klass* refk_oop = NULL;
 267     BasicType result = as_BasicType(java_class, &refk_oop);
 268     (*reference_klass) = KlassHandle(refk_oop);
 269     return result;
 270   }
 271   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 272   static void print_signature(oop java_class, outputStream *st);
 273   static const char* as_external_name(oop java_class);
 274   // Testing
 275   static bool is_instance(oop obj) {
 276     return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
 277   }
 278   static bool is_primitive(oop java_class);
 279   static BasicType primitive_type(oop java_class);
 280   static oop primitive_mirror(BasicType t);
 281   // JVM_NewArray support
 282   static Klass* array_klass(oop java_class);
 283   static void set_array_klass(oop java_class, Klass* klass);
 284   // compiler support for class operations
 285   static int klass_offset_in_bytes()                { return _klass_offset; }
 286   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 287   // Support for classRedefinedCount field
 288   static int classRedefinedCount(oop the_class_mirror);
 289   static void set_classRedefinedCount(oop the_class_mirror, int value);
 290 
 291   // Support for embedded per-class oops
 292   static oop  protection_domain(oop java_class);
 293   static oop  init_lock(oop java_class);
 294   static objArrayOop  signers(oop java_class);
 295   static void set_signers(oop java_class, objArrayOop signers);
 296 
 297   static oop class_loader(oop java_class);
 298 
 299   static int oop_size(oop java_class);
 300   static void set_oop_size(oop java_class, int size);
 301   static int static_oop_field_count(oop java_class);
 302   static void set_static_oop_field_count(oop java_class, int size);
 303 
 304   static GrowableArray<Klass*>* fixup_mirror_list() {
 305     return _fixup_mirror_list;
 306   }
 307   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 308     _fixup_mirror_list = v;
 309   }
 310   // Debugging
 311   friend class JavaClasses;
 312   friend class InstanceKlass;   // verification code accesses offsets
 313   friend class ClassFileParser; // access to number_of_fake_fields
 314 };
 315 
 316 // Interface to java.lang.Thread objects
 317 
 318 class java_lang_Thread : AllStatic {
 319  private:
 320   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 321   // so we compute the offsets at startup rather than hard-wiring them.
 322   static int _name_offset;
 323   static int _group_offset;
 324   static int _contextClassLoader_offset;
 325   static int _inheritedAccessControlContext_offset;
 326   static int _priority_offset;
 327   static int _eetop_offset;
 328   static int _daemon_offset;
 329   static int _stillborn_offset;
 330   static int _stackSize_offset;
 331   static int _tid_offset;
 332   static int _thread_status_offset;
 333   static int _park_blocker_offset;
 334   static int _park_event_offset ;
 335 
 336   static void compute_offsets();
 337 
 338  public:
 339   // Instance creation
 340   static oop create();
 341   // Returns the JavaThread associated with the thread obj
 342   static JavaThread* thread(oop java_thread);
 343   // Set JavaThread for instance
 344   static void set_thread(oop java_thread, JavaThread* thread);
 345   // Name
 346   static oop name(oop java_thread);
 347   static void set_name(oop java_thread, oop name);
 348   // Priority
 349   static ThreadPriority priority(oop java_thread);
 350   static void set_priority(oop java_thread, ThreadPriority priority);
 351   // Thread group
 352   static oop  threadGroup(oop java_thread);
 353   // Stillborn
 354   static bool is_stillborn(oop java_thread);
 355   static void set_stillborn(oop java_thread);
 356   // Alive (NOTE: this is not really a field, but provides the correct
 357   // definition without doing a Java call)
 358   static bool is_alive(oop java_thread);
 359   // Daemon
 360   static bool is_daemon(oop java_thread);
 361   static void set_daemon(oop java_thread);
 362   // Context ClassLoader
 363   static oop context_class_loader(oop java_thread);
 364   // Control context
 365   static oop inherited_access_control_context(oop java_thread);
 366   // Stack size hint
 367   static jlong stackSize(oop java_thread);
 368   // Thread ID
 369   static jlong thread_id(oop java_thread);
 370 
 371   // Blocker object responsible for thread parking
 372   static oop park_blocker(oop java_thread);
 373 
 374   // Pointer to type-stable park handler, encoded as jlong.
 375   // Should be set when apparently null
 376   // For details, see unsafe.cpp Unsafe_Unpark
 377   static jlong park_event(oop java_thread);
 378   static bool set_park_event(oop java_thread, jlong ptr);
 379 
 380   // Java Thread Status for JVMTI and M&M use.
 381   // This thread status info is saved in threadStatus field of
 382   // java.lang.Thread java class.
 383   enum ThreadStatus {
 384     NEW                      = 0,
 385     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 386                                JVMTI_THREAD_STATE_RUNNABLE,
 387     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 388                                JVMTI_THREAD_STATE_WAITING +
 389                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 390                                JVMTI_THREAD_STATE_SLEEPING,
 391     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 392                                JVMTI_THREAD_STATE_WAITING +
 393                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 394                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 395     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 396                                JVMTI_THREAD_STATE_WAITING +
 397                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 398                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 399     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 400                                JVMTI_THREAD_STATE_WAITING +
 401                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 402                                JVMTI_THREAD_STATE_PARKED,
 403     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 404                                JVMTI_THREAD_STATE_WAITING +
 405                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 406                                JVMTI_THREAD_STATE_PARKED,
 407     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 408                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 409     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 410   };
 411   // Write thread status info to threadStatus field of java.lang.Thread.
 412   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 413   // Read thread status info from threadStatus field of java.lang.Thread.
 414   static ThreadStatus get_thread_status(oop java_thread_oop);
 415 
 416   static const char*  thread_status_name(oop java_thread_oop);
 417 
 418   // Debugging
 419   friend class JavaClasses;
 420 };
 421 
 422 // Interface to java.lang.ThreadGroup objects
 423 
 424 class java_lang_ThreadGroup : AllStatic {
 425  private:
 426   static int _parent_offset;
 427   static int _name_offset;
 428   static int _threads_offset;
 429   static int _groups_offset;
 430   static int _maxPriority_offset;
 431   static int _destroyed_offset;
 432   static int _daemon_offset;
 433   static int _vmAllowSuspension_offset;
 434   static int _nthreads_offset;
 435   static int _ngroups_offset;
 436 
 437   static void compute_offsets();
 438 
 439  public:
 440   // parent ThreadGroup
 441   static oop  parent(oop java_thread_group);
 442   // name
 443   static typeArrayOop name(oop java_thread_group);
 444   // ("name as oop" accessor is not necessary)
 445   // Number of threads in group
 446   static int nthreads(oop java_thread_group);
 447   // threads
 448   static objArrayOop threads(oop java_thread_group);
 449   // Number of threads in group
 450   static int ngroups(oop java_thread_group);
 451   // groups
 452   static objArrayOop groups(oop java_thread_group);
 453   // maxPriority in group
 454   static ThreadPriority maxPriority(oop java_thread_group);
 455   // Destroyed
 456   static bool is_destroyed(oop java_thread_group);
 457   // Daemon
 458   static bool is_daemon(oop java_thread_group);
 459   // vmAllowSuspension
 460   static bool is_vmAllowSuspension(oop java_thread_group);
 461   // Debugging
 462   friend class JavaClasses;
 463 };
 464 
 465 
 466 
 467 // Interface to java.lang.Throwable objects
 468 
 469 class java_lang_Throwable: AllStatic {
 470   friend class BacktraceBuilder;
 471 
 472  private:
 473   // Offsets
 474   enum {
 475     hc_backtrace_offset     =  0,
 476     hc_detailMessage_offset =  1,
 477     hc_cause_offset         =  2,  // New since 1.4
 478     hc_stackTrace_offset    =  3   // New since 1.4
 479   };
 480   enum {
 481       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 482   };
 483   // Trace constants
 484   enum {
 485     trace_methods_offset = 0,
 486     trace_bcis_offset    = 1,
 487     trace_mirrors_offset = 2,
 488     trace_cprefs_offset  = 3,
 489     trace_next_offset    = 4,
 490     trace_size           = 5,
 491     trace_chunk_size     = 32
 492   };
 493 
 494   static int backtrace_offset;
 495   static int detailMessage_offset;
 496   static int cause_offset;
 497   static int stackTrace_offset;
 498   static int static_unassigned_stacktrace_offset;
 499 
 500   // Printing
 501   static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
 502   // StackTrace (programmatic access, new since 1.4)
 503   static void clear_stacktrace(oop throwable);
 504   // No stack trace available
 505   static const char* no_stack_trace_message();
 506   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 507   static void set_stacktrace(oop throwable, oop st_element_array);
 508   static oop unassigned_stacktrace();
 509 
 510  public:
 511   // Backtrace
 512   static oop backtrace(oop throwable);
 513   static void set_backtrace(oop throwable, oop value);
 514   // Needed by JVMTI to filter out this internal field.
 515   static int get_backtrace_offset() { return backtrace_offset;}
 516   static int get_detailMessage_offset() { return detailMessage_offset;}
 517   // Message
 518   static oop message(oop throwable);
 519   static oop message(Handle throwable);
 520   static void set_message(oop throwable, oop value);
 521   static void print_stack_element(outputStream *st, Handle mirror, int method,
 522                                   int version, int bci, int cpref);
 523   static void print_stack_element(outputStream *st, methodHandle method, int bci);
 524   static void print_stack_usage(Handle stream);
 525 
 526   // Allocate space for backtrace (created but stack trace not filled in)
 527   static void allocate_backtrace(Handle throwable, TRAPS);
 528   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 529   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 530   // Fill in current stack trace, can cause GC
 531   static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
 532   static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
 533   // Programmatic access to stack trace
 534   static oop  get_stack_trace_element(oop throwable, int index, TRAPS);
 535   static int  get_stack_trace_depth(oop throwable, TRAPS);
 536   // Printing
 537   static void print(oop throwable, outputStream* st);
 538   static void print(Handle throwable, outputStream* st);
 539   static void print_stack_trace(oop throwable, outputStream* st);
 540   // Debugging
 541   friend class JavaClasses;
 542 };
 543 
 544 
 545 // Interface to java.lang.reflect.AccessibleObject objects
 546 
 547 class java_lang_reflect_AccessibleObject: AllStatic {
 548  private:
 549   // Note that to reduce dependencies on the JDK we compute these
 550   // offsets at run-time.
 551   static int override_offset;
 552 
 553   static void compute_offsets();
 554 
 555  public:
 556   // Accessors
 557   static jboolean override(oop reflect);
 558   static void set_override(oop reflect, jboolean value);
 559 
 560   // Debugging
 561   friend class JavaClasses;
 562 };
 563 
 564 
 565 // Interface to java.lang.reflect.Method objects
 566 
 567 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 568  private:
 569   // Note that to reduce dependencies on the JDK we compute these
 570   // offsets at run-time.
 571   static int clazz_offset;
 572   static int name_offset;
 573   static int returnType_offset;
 574   static int parameterTypes_offset;
 575   static int exceptionTypes_offset;
 576   static int slot_offset;
 577   static int modifiers_offset;
 578   static int signature_offset;
 579   static int annotations_offset;
 580   static int parameter_annotations_offset;
 581   static int annotation_default_offset;
 582   static int type_annotations_offset;
 583 
 584   static void compute_offsets();
 585 
 586  public:
 587   // Allocation
 588   static Handle create(TRAPS);
 589 
 590   // Accessors
 591   static oop clazz(oop reflect);
 592   static void set_clazz(oop reflect, oop value);
 593 
 594   static oop name(oop method);
 595   static void set_name(oop method, oop value);
 596 
 597   static oop return_type(oop method);
 598   static void set_return_type(oop method, oop value);
 599 
 600   static oop parameter_types(oop method);
 601   static void set_parameter_types(oop method, oop value);
 602 
 603   static oop exception_types(oop method);
 604   static void set_exception_types(oop method, oop value);
 605 
 606   static int slot(oop reflect);
 607   static void set_slot(oop reflect, int value);
 608 
 609   static int modifiers(oop method);
 610   static void set_modifiers(oop method, int value);
 611 
 612   static bool has_signature_field();
 613   static oop signature(oop method);
 614   static void set_signature(oop method, oop value);
 615 
 616   static bool has_annotations_field();
 617   static oop annotations(oop method);
 618   static void set_annotations(oop method, oop value);
 619 
 620   static bool has_parameter_annotations_field();
 621   static oop parameter_annotations(oop method);
 622   static void set_parameter_annotations(oop method, oop value);
 623 
 624   static bool has_annotation_default_field();
 625   static oop annotation_default(oop method);
 626   static void set_annotation_default(oop method, oop value);
 627 
 628   static bool has_type_annotations_field();
 629   static oop type_annotations(oop method);
 630   static void set_type_annotations(oop method, oop value);
 631 
 632   // Debugging
 633   friend class JavaClasses;
 634 };
 635 
 636 
 637 // Interface to java.lang.reflect.Constructor objects
 638 
 639 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 640  private:
 641   // Note that to reduce dependencies on the JDK we compute these
 642   // offsets at run-time.
 643   static int clazz_offset;
 644   static int parameterTypes_offset;
 645   static int exceptionTypes_offset;
 646   static int slot_offset;
 647   static int modifiers_offset;
 648   static int signature_offset;
 649   static int annotations_offset;
 650   static int parameter_annotations_offset;
 651   static int type_annotations_offset;
 652 
 653   static void compute_offsets();
 654 
 655  public:
 656   // Allocation
 657   static Handle create(TRAPS);
 658 
 659   // Accessors
 660   static oop clazz(oop reflect);
 661   static void set_clazz(oop reflect, oop value);
 662 
 663   static oop parameter_types(oop constructor);
 664   static void set_parameter_types(oop constructor, oop value);
 665 
 666   static oop exception_types(oop constructor);
 667   static void set_exception_types(oop constructor, oop value);
 668 
 669   static int slot(oop reflect);
 670   static void set_slot(oop reflect, int value);
 671 
 672   static int modifiers(oop constructor);
 673   static void set_modifiers(oop constructor, int value);
 674 
 675   static bool has_signature_field();
 676   static oop signature(oop constructor);
 677   static void set_signature(oop constructor, oop value);
 678 
 679   static bool has_annotations_field();
 680   static oop annotations(oop constructor);
 681   static void set_annotations(oop constructor, oop value);
 682 
 683   static bool has_parameter_annotations_field();
 684   static oop parameter_annotations(oop method);
 685   static void set_parameter_annotations(oop method, oop value);
 686 
 687   static bool has_type_annotations_field();
 688   static oop type_annotations(oop constructor);
 689   static void set_type_annotations(oop constructor, oop value);
 690 
 691   // Debugging
 692   friend class JavaClasses;
 693 };
 694 
 695 
 696 // Interface to java.lang.reflect.Field objects
 697 
 698 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 699  private:
 700   // Note that to reduce dependencies on the JDK we compute these
 701   // offsets at run-time.
 702   static int clazz_offset;
 703   static int name_offset;
 704   static int type_offset;
 705   static int slot_offset;
 706   static int modifiers_offset;
 707   static int signature_offset;
 708   static int annotations_offset;
 709   static int type_annotations_offset;
 710 
 711   static void compute_offsets();
 712 
 713  public:
 714   // Allocation
 715   static Handle create(TRAPS);
 716 
 717   // Accessors
 718   static oop clazz(oop reflect);
 719   static void set_clazz(oop reflect, oop value);
 720 
 721   static oop name(oop field);
 722   static void set_name(oop field, oop value);
 723 
 724   static oop type(oop field);
 725   static void set_type(oop field, oop value);
 726 
 727   static int slot(oop reflect);
 728   static void set_slot(oop reflect, int value);
 729 
 730   static int modifiers(oop field);
 731   static void set_modifiers(oop field, int value);
 732 
 733   static bool has_signature_field();
 734   static oop signature(oop constructor);
 735   static void set_signature(oop constructor, oop value);
 736 
 737   static bool has_annotations_field();
 738   static oop annotations(oop constructor);
 739   static void set_annotations(oop constructor, oop value);
 740 
 741   static bool has_parameter_annotations_field();
 742   static oop parameter_annotations(oop method);
 743   static void set_parameter_annotations(oop method, oop value);
 744 
 745   static bool has_annotation_default_field();
 746   static oop annotation_default(oop method);
 747   static void set_annotation_default(oop method, oop value);
 748 
 749   static bool has_type_annotations_field();
 750   static oop type_annotations(oop field);
 751   static void set_type_annotations(oop field, oop value);
 752 
 753   // Debugging
 754   friend class JavaClasses;
 755 };
 756 
 757 class java_lang_reflect_Parameter {
 758  private:
 759   // Note that to reduce dependencies on the JDK we compute these
 760   // offsets at run-time.
 761   static int name_offset;
 762   static int modifiers_offset;
 763   static int index_offset;
 764   static int executable_offset;
 765 
 766   static void compute_offsets();
 767 
 768  public:
 769   // Allocation
 770   static Handle create(TRAPS);
 771 
 772   // Accessors
 773   static oop name(oop field);
 774   static void set_name(oop field, oop value);
 775 
 776   static int index(oop reflect);
 777   static void set_index(oop reflect, int value);
 778 
 779   static int modifiers(oop reflect);
 780   static void set_modifiers(oop reflect, int value);
 781 
 782   static oop executable(oop constructor);
 783   static void set_executable(oop constructor, oop value);
 784 
 785   friend class JavaClasses;
 786 };
 787 
 788 // Interface to sun.reflect.ConstantPool objects
 789 class sun_reflect_ConstantPool {
 790  private:
 791   // Note that to reduce dependencies on the JDK we compute these
 792   // offsets at run-time.
 793   static int _oop_offset;
 794 
 795   static void compute_offsets();
 796 
 797  public:
 798   // Allocation
 799   static Handle create(TRAPS);
 800 
 801   // Accessors
 802   static void set_cp(oop reflect, ConstantPool* value);
 803   static int oop_offset() {
 804     return _oop_offset;
 805   }
 806 
 807   static ConstantPool* get_cp(oop reflect);
 808 
 809   // Debugging
 810   friend class JavaClasses;
 811 };
 812 
 813 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
 814 class sun_reflect_UnsafeStaticFieldAccessorImpl {
 815  private:
 816   static int _base_offset;
 817   static void compute_offsets();
 818 
 819  public:
 820   static int base_offset() {
 821     return _base_offset;
 822   }
 823 
 824   // Debugging
 825   friend class JavaClasses;
 826 };
 827 
 828 // Interface to java.lang primitive type boxing objects:
 829 //  - java.lang.Boolean
 830 //  - java.lang.Character
 831 //  - java.lang.Float
 832 //  - java.lang.Double
 833 //  - java.lang.Byte
 834 //  - java.lang.Short
 835 //  - java.lang.Integer
 836 //  - java.lang.Long
 837 
 838 // This could be separated out into 8 individual classes.
 839 
 840 class java_lang_boxing_object: AllStatic {
 841  private:
 842   enum {
 843    hc_value_offset = 0
 844   };
 845   static int value_offset;
 846   static int long_value_offset;
 847 
 848   static oop initialize_and_allocate(BasicType type, TRAPS);
 849  public:
 850   // Allocation. Returns a boxed value, or NULL for invalid type.
 851   static oop create(BasicType type, jvalue* value, TRAPS);
 852   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 853   static BasicType get_value(oop box, jvalue* value);
 854   static BasicType set_value(oop box, jvalue* value);
 855   static BasicType basic_type(oop box);
 856   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 857   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 858   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 859   static void print(BasicType type, jvalue* value, outputStream* st);
 860 
 861   static int value_offset_in_bytes(BasicType type) {
 862     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 863                                                     value_offset;
 864   }
 865 
 866   // Debugging
 867   friend class JavaClasses;
 868 };
 869 
 870 
 871 
 872 // Interface to java.lang.ref.Reference objects
 873 
 874 class java_lang_ref_Reference: AllStatic {
 875  public:
 876   enum {
 877    hc_referent_offset   = 0,
 878    hc_queue_offset      = 1,
 879    hc_next_offset       = 2,
 880    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 881   };
 882   enum {
 883    hc_static_lock_offset    = 0,
 884    hc_static_pending_offset = 1
 885   };
 886 
 887   static int referent_offset;
 888   static int queue_offset;
 889   static int next_offset;
 890   static int discovered_offset;
 891   static int static_lock_offset;
 892   static int static_pending_offset;
 893   static int number_of_fake_oop_fields;
 894 
 895   // Accessors
 896   static oop referent(oop ref) {
 897     return ref->obj_field(referent_offset);
 898   }
 899   static void set_referent(oop ref, oop value) {
 900     ref->obj_field_put(referent_offset, value);
 901   }
 902   static void set_referent_raw(oop ref, oop value) {
 903     ref->obj_field_put_raw(referent_offset, value);
 904   }
 905   static HeapWord* referent_addr(oop ref) {
 906     return ref->obj_field_addr<HeapWord>(referent_offset);
 907   }
 908   static oop next(oop ref) {
 909     return ref->obj_field(next_offset);
 910   }
 911   static void set_next(oop ref, oop value) {
 912     ref->obj_field_put(next_offset, value);
 913   }
 914   static void set_next_raw(oop ref, oop value) {
 915     ref->obj_field_put_raw(next_offset, value);
 916   }
 917   static HeapWord* next_addr(oop ref) {
 918     return ref->obj_field_addr<HeapWord>(next_offset);
 919   }
 920   static oop discovered(oop ref) {
 921     return ref->obj_field(discovered_offset);
 922   }
 923   static void set_discovered(oop ref, oop value) {
 924     ref->obj_field_put(discovered_offset, value);
 925   }
 926   static void set_discovered_raw(oop ref, oop value) {
 927     ref->obj_field_put_raw(discovered_offset, value);
 928   }
 929   static HeapWord* discovered_addr(oop ref) {
 930     return ref->obj_field_addr<HeapWord>(discovered_offset);
 931   }
 932   static inline oop queue(oop ref) {
 933     return ref->obj_field(queue_offset);
 934   }
 935   static inline void set_queue(oop ref, oop value) {
 936     return ref->obj_field_put(queue_offset, value);
 937   }
 938   // Accessors for statics
 939   static oop  pending_list_lock();
 940   static oop  pending_list();
 941 
 942   static HeapWord*  pending_list_lock_addr();
 943   static HeapWord*  pending_list_addr();
 944 };
 945 
 946 
 947 // Interface to java.lang.ref.SoftReference objects
 948 
 949 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 950  public:
 951   enum {
 952    // The timestamp is a long field and may need to be adjusted for alignment.
 953    hc_timestamp_offset  = hc_discovered_offset + 1
 954   };
 955   enum {
 956    hc_static_clock_offset = 0
 957   };
 958 
 959   static int timestamp_offset;
 960   static int static_clock_offset;
 961 
 962   // Accessors
 963   static jlong timestamp(oop ref);
 964 
 965   // Accessors for statics
 966   static jlong clock();
 967   static void set_clock(jlong value);
 968 };
 969 
 970 
 971 // Interface to java.lang.ref.ReferenceQueue objects
 972 
 973 class java_lang_ref_ReferenceQueue: public AllStatic {
 974 public:
 975   static int static_NULL_queue_offset;
 976   static int static_ENQUEUED_queue_offset;
 977 
 978   // Accessors
 979   static oop NULL_queue();
 980   static oop ENQUEUED_queue();
 981 
 982   static void compute_offsets();
 983 };
 984 
 985 // Interface to java.lang.invoke.MethodHandle objects
 986 
 987 class MethodHandleEntry;
 988 
 989 class java_lang_invoke_MethodHandle: AllStatic {
 990   friend class JavaClasses;
 991 
 992  private:
 993   static int _type_offset;               // the MethodType of this MH
 994   static int _form_offset;               // the LambdaForm of this MH
 995 
 996   static void compute_offsets();
 997 
 998  public:
 999   // Accessors
1000   static oop            type(oop mh);
1001   static void       set_type(oop mh, oop mtype);
1002 
1003   static oop            form(oop mh);
1004   static void       set_form(oop mh, oop lform);
1005 
1006   // Testers
1007   static bool is_subclass(Klass* klass) {
1008     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
1009   }
1010   static bool is_instance(oop obj) {
1011     return obj != NULL && is_subclass(obj->klass());
1012   }
1013 
1014   // Accessors for code generation:
1015   static int type_offset_in_bytes()             { return _type_offset; }
1016   static int form_offset_in_bytes()             { return _form_offset; }
1017 };
1018 
1019 // Interface to java.lang.invoke.DirectMethodHandle objects
1020 
1021 class java_lang_invoke_DirectMethodHandle: AllStatic {
1022   friend class JavaClasses;
1023 
1024  private:
1025   static int _member_offset;               // the MemberName of this DMH
1026 
1027   static void compute_offsets();
1028 
1029  public:
1030   // Accessors
1031   static oop  member(oop mh);
1032 
1033   // Testers
1034   static bool is_subclass(Klass* klass) {
1035     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1036   }
1037   static bool is_instance(oop obj) {
1038     return obj != NULL && is_subclass(obj->klass());
1039   }
1040 
1041   // Accessors for code generation:
1042   static int member_offset_in_bytes()           { return _member_offset; }
1043 };
1044 
1045 // Interface to java.lang.invoke.LambdaForm objects
1046 // (These are a private interface for managing adapter code generation.)
1047 
1048 class java_lang_invoke_LambdaForm: AllStatic {
1049   friend class JavaClasses;
1050 
1051  private:
1052   static int _vmentry_offset;  // type is MemberName
1053 
1054   static void compute_offsets();
1055 
1056  public:
1057   // Accessors
1058   static oop            vmentry(oop lform);
1059   static void       set_vmentry(oop lform, oop invoker);
1060 
1061   // Testers
1062   static bool is_subclass(Klass* klass) {
1063     return SystemDictionary::LambdaForm_klass() != NULL &&
1064       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1065   }
1066   static bool is_instance(oop obj) {
1067     return obj != NULL && is_subclass(obj->klass());
1068   }
1069 
1070   // Accessors for code generation:
1071   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1072 };
1073 
1074 
1075 // Interface to java.lang.invoke.MemberName objects
1076 // (These are a private interface for Java code to query the class hierarchy.)
1077 
1078 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1079   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1080   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1081   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1082 
1083 class java_lang_invoke_MemberName: AllStatic {
1084   friend class JavaClasses;
1085 
1086  private:
1087   // From java.lang.invoke.MemberName:
1088   //    private Class<?>   clazz;       // class in which the method is defined
1089   //    private String     name;        // may be null if not yet materialized
1090   //    private Object     type;        // may be null if not yet materialized
1091   //    private int        flags;       // modifier bits; see reflect.Modifier
1092   //    private intptr     vmtarget;    // VM-specific target value
1093   //    private intptr_t   vmindex;     // member index within class or interface
1094   static int _clazz_offset;
1095   static int _name_offset;
1096   static int _type_offset;
1097   static int _flags_offset;
1098   static int _vmtarget_offset;
1099   static int _vmloader_offset;
1100   static int _vmindex_offset;
1101 
1102   static void compute_offsets();
1103 
1104  public:
1105   // Accessors
1106   static oop            clazz(oop mname);
1107   static void       set_clazz(oop mname, oop clazz);
1108 
1109   static oop            type(oop mname);
1110   static void       set_type(oop mname, oop type);
1111 
1112   static oop            name(oop mname);
1113   static void       set_name(oop mname, oop name);
1114 
1115   static int            flags(oop mname);
1116   static void       set_flags(oop mname, int flags);
1117 
1118   static Metadata*      vmtarget(oop mname);
1119   static void       set_vmtarget(oop mname, Metadata* target);
1120 
1121   static intptr_t       vmindex(oop mname);
1122   static void       set_vmindex(oop mname, intptr_t index);
1123 
1124   // Testers
1125   static bool is_subclass(Klass* klass) {
1126     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1127   }
1128   static bool is_instance(oop obj) {
1129     return obj != NULL && is_subclass(obj->klass());
1130   }
1131 
1132   static bool is_method(oop obj);
1133 
1134   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1135   enum {
1136     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1137     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1138     MN_IS_FIELD             = 0x00040000, // field
1139     MN_IS_TYPE              = 0x00080000, // nested type
1140     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1141     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1142     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1143     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1144     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1145     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1146   };
1147 
1148   // Accessors for code generation:
1149   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1150   static int type_offset_in_bytes()             { return _type_offset; }
1151   static int name_offset_in_bytes()             { return _name_offset; }
1152   static int flags_offset_in_bytes()            { return _flags_offset; }
1153   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1154   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1155 
1156   static bool equals(oop mt1, oop mt2);
1157 };
1158 
1159 
1160 // Interface to java.lang.invoke.MethodType objects
1161 
1162 class java_lang_invoke_MethodType: AllStatic {
1163   friend class JavaClasses;
1164 
1165  private:
1166   static int _rtype_offset;
1167   static int _ptypes_offset;
1168 
1169   static void compute_offsets();
1170 
1171  public:
1172   // Accessors
1173   static oop            rtype(oop mt);
1174   static objArrayOop    ptypes(oop mt);
1175 
1176   static oop            ptype(oop mt, int index);
1177   static int            ptype_count(oop mt);
1178 
1179   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1180   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1181 
1182   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1183   static void           print_signature(oop mt, outputStream* st);
1184 
1185   static bool is_instance(oop obj) {
1186     return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1187   }
1188 
1189   static bool equals(oop mt1, oop mt2);
1190 
1191   // Accessors for code generation:
1192   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1193   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1194 };
1195 
1196 
1197 // Interface to java.lang.invoke.CallSite objects
1198 
1199 class java_lang_invoke_CallSite: AllStatic {
1200   friend class JavaClasses;
1201 
1202 private:
1203   static int _target_offset;
1204 
1205   static void compute_offsets();
1206 
1207 public:
1208   // Accessors
1209   static oop              target(         oop site)             { return site->obj_field(             _target_offset);         }
1210   static void         set_target(         oop site, oop target) {        site->obj_field_put(         _target_offset, target); }
1211 
1212   static volatile oop     target_volatile(oop site)             { return oop((oopDesc *)(site->obj_field_volatile(_target_offset))); }
1213   static void         set_target_volatile(oop site, oop target) {        site->obj_field_put_volatile(_target_offset, target); }
1214 
1215   // Testers
1216   static bool is_subclass(Klass* klass) {
1217     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1218   }
1219   static bool is_instance(oop obj) {
1220     return obj != NULL && is_subclass(obj->klass());
1221   }
1222 
1223   // Accessors for code generation:
1224   static int target_offset_in_bytes()           { return _target_offset; }
1225 };
1226 
1227 
1228 // Interface to java.security.AccessControlContext objects
1229 
1230 class java_security_AccessControlContext: AllStatic {
1231  private:
1232   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1233   // so we compute the offsets at startup rather than hard-wiring them.
1234   static int _context_offset;
1235   static int _privilegedContext_offset;
1236   static int _isPrivileged_offset;
1237   static int _isAuthorized_offset;
1238 
1239   static void compute_offsets();
1240  public:
1241   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1242 
1243   static bool is_authorized(Handle context);
1244 
1245   // Debugging/initialization
1246   friend class JavaClasses;
1247 };
1248 
1249 
1250 // Interface to java.lang.ClassLoader objects
1251 
1252 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1253   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1254 
1255 class java_lang_ClassLoader : AllStatic {
1256  private:
1257   // The fake offsets are added by the class loader when java.lang.Class is loaded
1258   enum {
1259    hc_parent_offset = 0
1260   };
1261   static int _loader_data_offset;
1262   static bool offsets_computed;
1263   static int parent_offset;
1264   static int parallelCapable_offset;
1265 
1266  public:
1267   static void compute_offsets();
1268 
1269   static ClassLoaderData** loader_data_addr(oop loader);
1270   static ClassLoaderData* loader_data(oop loader);
1271 
1272   static oop parent(oop loader);
1273   static bool isAncestor(oop loader, oop cl);
1274 
1275   // Support for parallelCapable field
1276   static bool parallelCapable(oop the_class_mirror);
1277 
1278   static bool is_trusted_loader(oop loader);
1279 
1280   // Fix for 4474172
1281   static oop  non_reflection_class_loader(oop loader);
1282 
1283   // Testers
1284   static bool is_subclass(Klass* klass) {
1285     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1286   }
1287   static bool is_instance(oop obj) {
1288     return obj != NULL && is_subclass(obj->klass());
1289   }
1290 
1291   // Debugging
1292   friend class JavaClasses;
1293   friend class ClassFileParser; // access to number_of_fake_fields
1294 };
1295 
1296 
1297 // Interface to java.lang.System objects
1298 
1299 class java_lang_System : AllStatic {
1300  private:
1301   enum {
1302    hc_static_in_offset  = 0,
1303    hc_static_out_offset = 1,
1304    hc_static_err_offset = 2,
1305    hc_static_security_offset = 3
1306   };
1307 
1308   static int  static_in_offset;
1309   static int static_out_offset;
1310   static int static_err_offset;
1311   static int static_security_offset;
1312 
1313  public:
1314   static int  in_offset_in_bytes();
1315   static int out_offset_in_bytes();
1316   static int err_offset_in_bytes();
1317 
1318   static bool has_security_manager();
1319 
1320   // Debugging
1321   friend class JavaClasses;
1322 };
1323 
1324 
1325 // Interface to java.lang.StackTraceElement objects
1326 
1327 class java_lang_StackTraceElement: AllStatic {
1328  private:
1329   enum {
1330     hc_declaringClass_offset  = 0,
1331     hc_methodName_offset = 1,
1332     hc_fileName_offset   = 2,
1333     hc_lineNumber_offset = 3
1334   };
1335 
1336   static int declaringClass_offset;
1337   static int methodName_offset;
1338   static int fileName_offset;
1339   static int lineNumber_offset;
1340 
1341  public:
1342   // Setters
1343   static void set_declaringClass(oop element, oop value);
1344   static void set_methodName(oop element, oop value);
1345   static void set_fileName(oop element, oop value);
1346   static void set_lineNumber(oop element, int value);
1347 
1348   // Create an instance of StackTraceElement
1349   static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1350   static oop create(methodHandle method, int bci, TRAPS);
1351 
1352   // Debugging
1353   friend class JavaClasses;
1354 };
1355 
1356 
1357 // Interface to java.lang.AssertionStatusDirectives objects
1358 
1359 class java_lang_AssertionStatusDirectives: AllStatic {
1360  private:
1361   enum {
1362     hc_classes_offset,
1363     hc_classEnabled_offset,
1364     hc_packages_offset,
1365     hc_packageEnabled_offset,
1366     hc_deflt_offset
1367   };
1368 
1369   static int classes_offset;
1370   static int classEnabled_offset;
1371   static int packages_offset;
1372   static int packageEnabled_offset;
1373   static int deflt_offset;
1374 
1375  public:
1376   // Setters
1377   static void set_classes(oop obj, oop val);
1378   static void set_classEnabled(oop obj, oop val);
1379   static void set_packages(oop obj, oop val);
1380   static void set_packageEnabled(oop obj, oop val);
1381   static void set_deflt(oop obj, bool val);
1382   // Debugging
1383   friend class JavaClasses;
1384 };
1385 
1386 
1387 class java_nio_Buffer: AllStatic {
1388  private:
1389   static int _limit_offset;
1390 
1391  public:
1392   static int  limit_offset();
1393   static void compute_offsets();
1394 };
1395 
1396 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1397  private:
1398   static int  _owner_offset;
1399  public:
1400   static void initialize(TRAPS);
1401   static oop  get_owner_threadObj(oop obj);
1402 };
1403 
1404 // Use to declare fields that need to be injected into Java classes
1405 // for the JVM to use.  The name_index and signature_index are
1406 // declared in vmSymbols.  The may_be_java flag is used to declare
1407 // fields that might already exist in Java but should be injected if
1408 // they don't.  Otherwise the field is unconditionally injected and
1409 // the JVM uses the injected one.  This is to ensure that name
1410 // collisions don't occur.  In general may_be_java should be false
1411 // unless there's a good reason.
1412 
1413 class InjectedField {
1414  public:
1415   const SystemDictionary::WKID klass_id;
1416   const vmSymbols::SID name_index;
1417   const vmSymbols::SID signature_index;
1418   const bool           may_be_java;
1419 
1420 
1421   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1422   Symbol* name() const      { return lookup_symbol(name_index); }
1423   Symbol* signature() const { return lookup_symbol(signature_index); }
1424 
1425   int compute_offset();
1426 
1427   // Find the Symbol for this index
1428   static Symbol* lookup_symbol(int symbol_index) {
1429     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1430   }
1431 };
1432 
1433 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1434   klass##_##name##_enum,
1435 
1436 #define ALL_INJECTED_FIELDS(macro)          \
1437   CLASS_INJECTED_FIELDS(macro)              \
1438   CLASSLOADER_INJECTED_FIELDS(macro)        \
1439   MEMBERNAME_INJECTED_FIELDS(macro)
1440 
1441 // Interface to hard-coded offset checking
1442 
1443 class JavaClasses : AllStatic {
1444  private:
1445 
1446   static InjectedField _injected_fields[];
1447 
1448   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1449   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1450   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1451 
1452  public:
1453   enum InjectedFieldID {
1454     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1455     MAX_enum
1456   };
1457 
1458   static int compute_injected_offset(InjectedFieldID id);
1459 
1460   static void compute_hard_coded_offsets();
1461   static void compute_offsets();
1462   static void check_offsets() PRODUCT_RETURN;
1463 
1464   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1465 };
1466 
1467 #undef DECLARE_INJECTED_FIELD_ENUM
1468 
1469 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP