libjava/java/lang/Class.h

   1 // Class.h - Header file for java.lang.Class.  -*- c++ -*-
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 // Written primary using compiler source and Class.java as guides.
  12 #ifndef __JAVA_LANG_CLASS_H__
  13 #define __JAVA_LANG_CLASS_H__
  14
  15 #pragma interface
  16
  17 #include <stddef.h>
  18 #include <java/lang/Object.h>
  19 #include <java/lang/String.h>
  20 #include <java/net/URL.h>
  21 #include <java/lang/reflect/Modifier.h>
  22 #include <java/security/ProtectionDomain.h>
  23 #include <java/lang/Package.h>
  24
  25 // Avoid including SystemClassLoader.h.
  26 extern "Java"
  27 {
  28   namespace gnu
  29   {
  30     namespace gcj
  31     {
  32       namespace runtime
  33       {
  34         class SystemClassLoader;
  35       }
  36     }
  37   }
  38 }
  39
  40 // We declare these here to avoid including gcj/cni.h.
  41 extern "C" void _Jv_InitClass (jclass klass);
  42 extern "C" jclass _Jv_NewClassFromInitializer
  43    (const jclass class_initializer);
  44 extern "C" void _Jv_RegisterNewClasses (void **classes);
  45 extern "C" void _Jv_RegisterClasses (const jclass *classes);
  46 extern "C" void _Jv_RegisterClasses_Counted (const jclass *classes,
  47                                              size_t count);
  48
  49 // This must be predefined with "C" linkage.
  50 extern "C" void *_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
  51                                                int meth_idx);
  52 extern "C" void *_Jv_ResolvePoolEntry (jclass this_class, jint index);
  53
  54 // These are the possible values for the `state' field of the class
  55 // structure.  Note that ordering is important here.  Whenever the
  56 // state changes, one should notify all waiters of this class.
  57 enum
  58 {
  59   JV_STATE_NOTHING = 0,         // Set by compiler.
  60
  61   JV_STATE_PRELOADING = 1,      // Can do _Jv_FindClass.
  62
  63   // There is an invariant through libgcj that a class will always be
  64   // at a state greater than or equal to JV_STATE_LOADING when it is
  65   // returned by a class loader to user code.  Hence, defineclass.cc
  66   // installs supers before returning a class, C++-ABI-compiled
  67   // classes are created with supers installed, and BC-ABI-compiled
  68   // classes are linked to this state before being returned by their
  69   // class loader.
  70   JV_STATE_LOADING = 3,         // Has super installed.
  71   JV_STATE_READ = 4,            // Has been completely defined.
  72   JV_STATE_LOADED = 5,          // Has Miranda methods defined.
  73
  74   JV_STATE_COMPILED = 6,        // This was a compiled class.
  75
  76   JV_STATE_PREPARED = 7,        // Layout & static init done.
  77   JV_STATE_LINKED = 9,          // Strings interned.
  78
  79   JV_STATE_IN_PROGRESS = 10,    // <clinit> running.
  80
  81   JV_STATE_ERROR = 12,
  82
  83   JV_STATE_PHANTOM = 13,        // Bytecode is missing. In many cases we can
  84                                 // work around that. If not, throw a
  85                                 // NoClassDefFoundError.
  86
  87   JV_STATE_DONE = 14,           // Must be last.
  88
  89
  90 };
  91
  92 struct _Jv_Field;
  93 struct _Jv_VTable;
  94 union _Jv_word;
  95 struct _Jv_ArrayVTable;
  96 class _Jv_Linker;
  97 class _Jv_ExecutionEngine;
  98 class _Jv_CompiledEngine;
  99 class _Jv_IndirectCompiledEngine;
 100 class _Jv_InterpreterEngine;
 101
 102 #ifdef INTERPRETER
 103 class _Jv_ClassReader;
 104 class _Jv_InterpClass;
 105 class _Jv_InterpMethod;
 106 #endif
 107
 108 struct _Jv_Constants
 109 {
 110   jint size;
 111   jbyte *tags;
 112   _Jv_word *data;
 113 };
 114
 115 struct _Jv_Method
 116 {
 117   // Method name.
 118   _Jv_Utf8Const *name;
 119   // Method signature.
 120   _Jv_Utf8Const *signature;
 121   // Access flags.
 122   _Jv_ushort accflags;
 123   // Method's index in the vtable.
 124   _Jv_ushort index;
 125   // Pointer to underlying function.
 126   void *ncode;
 127   // NULL-terminated list of exception class names; can be NULL if
 128   // there are none such.
 129   _Jv_Utf8Const **throws;
 130
 131   _Jv_Method *getNextMethod ()
 132   { return this + 1; }
 133 };
 134
 135 // The table used to resolve interface calls.
 136 struct _Jv_IDispatchTable
 137 {
 138   // Index into interface's ioffsets.
 139   jshort iindex;
 140   jshort itable_length;
 141   // Class Interface dispatch table.
 142   void *itable[0];
 143 };
 144
 145 // Used by _Jv_Linker::get_interfaces ()
 146 struct _Jv_ifaces
 147 {
 148   jclass *list;
 149   jshort len;
 150   jshort count;
 151 };
 152
 153 struct _Jv_MethodSymbol
 154 {
 155   _Jv_Utf8Const *class_name;
 156   _Jv_Utf8Const *name;
 157   _Jv_Utf8Const *signature;
 158 };
 159
 160 struct _Jv_OffsetTable
 161 {
 162   jint state;
 163   jint offsets[];
 164 };
 165
 166 struct _Jv_AddressTable
 167 {
 168   jint state;
 169   void *addresses[];
 170 };
 171
 172 struct _Jv_CatchClass
 173 {
 174   java::lang::Class **address;
 175   _Jv_Utf8Const *classname;
 176 };
 177
 178 // Possible values for the assertion_code field in the type assertion table.
 179 enum
 180 {
 181   JV_ASSERT_END_OF_TABLE = 0,
 182   JV_ASSERT_TYPES_COMPATIBLE = 1,
 183   JV_ASSERT_IS_INSTANTIABLE = 2
 184 };
 185
 186 // Entry in the type assertion table, used to validate type constraints
 187 // for binary compatibility.
 188 struct _Jv_TypeAssertion
 189 {
 190   jint assertion_code;
 191   _Jv_Utf8Const *op1;
 192   _Jv_Utf8Const *op2;
 193 };
 194
 195 #define JV_PRIMITIVE_VTABLE ((_Jv_VTable *) -1)
 196
 197 #define JV_CLASS(Obj) ((jclass) (*(_Jv_VTable **) Obj)->clas)
 198
 199 // Forward declarations for friends of java::lang::Class
 200
 201 // Friend functions implemented in natClass.cc.
 202 _Jv_Method *_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
 203                                 _Jv_Utf8Const *signature);
 204 jboolean _Jv_IsAssignableFrom (jclass, jclass);
 205 jboolean _Jv_IsAssignableFromSlow (jclass, jclass);
 206 jboolean _Jv_InterfaceAssignableFrom (jclass, jclass);
 207
 208 _Jv_Method* _Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
 209                                       _Jv_Utf8Const*, jclass * = NULL);
 210 jfieldID JvGetFirstInstanceField (jclass);
 211 jint JvNumInstanceFields (jclass);
 212 jfieldID JvGetFirstStaticField (jclass);
 213 jint JvNumStaticFields (jclass);
 214
 215 jobject _Jv_AllocObject (jclass);
 216 void *_Jv_AllocObj (jint, jclass);
 217 void *_Jv_AllocPtrFreeObj (jint, jclass);
 218 void *_Jv_AllocArray (jint, jclass);
 219
 220 bool _Jv_getInterfaceMethod(jclass, jclass&, int&,
 221                             const _Jv_Utf8Const*,
 222                             const _Jv_Utf8Const*);
 223
 224 jobject _Jv_JNI_ToReflectedField (_Jv_JNIEnv *, jclass, jfieldID,
 225                                   jboolean);
 226 jobject _Jv_JNI_ToReflectedMethod (_Jv_JNIEnv *, jclass, jmethodID,
 227                                    jboolean);
 228 jfieldID _Jv_FromReflectedField (java::lang::reflect::Field *);
 229
 230 jmethodID _Jv_FromReflectedMethod (java::lang::reflect::Method *);
 231 jmethodID _Jv_FromReflectedConstructor (java::lang::reflect::Constructor *);
 232 jint JvNumMethods (jclass);
 233 jmethodID JvGetFirstMethod (jclass);
 234
 235 #ifdef INTERPRETER
 236 // Finds a desired interpreter method in the given class or NULL if not found
 237 _Jv_InterpMethod* _Jv_FindInterpreterMethod (jclass, jmethodID);
 238 #endif
 239
 240 // Friend classes and functions to implement the ClassLoader
 241 class java::lang::ClassLoader;
 242 class java::lang::VMClassLoader;
 243
 244 class java::io::ObjectOutputStream;
 245 class java::io::ObjectInputStream;
 246 class java::io::ObjectStreamClass;
 247
 248 void _Jv_RegisterClassHookDefault (jclass klass);
 249 void _Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 250 void _Jv_UnregisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 251 void _Jv_UnregisterClass (jclass);
 252 jclass _Jv_FindClassNoException (_Jv_Utf8Const *name,
 253                       java::lang::ClassLoader *loader);
 254 jclass _Jv_FindClass (_Jv_Utf8Const *name,
 255                       java::lang::ClassLoader *loader);
 256 jclass _Jv_FindClassInCache (_Jv_Utf8Const *name);
 257 jclass _Jv_PopClass (void);
 258 void _Jv_PushClass (jclass k);
 259 void _Jv_NewArrayClass (jclass element,
 260                         java::lang::ClassLoader *loader,
 261                         _Jv_VTable *array_vtable = 0);
 262 jclass _Jv_NewClass (_Jv_Utf8Const *name, jclass superclass,
 263                      java::lang::ClassLoader *loader);
 264 void _Jv_InitNewClassFields (jclass klass);
 265
 266 // Friend functions and classes in prims.cc
 267 void _Jv_InitPrimClass (jclass, const char *, char, int);
 268 jstring _Jv_GetMethodString (jclass, _Jv_Method *, jclass = NULL);
 269
 270 jboolean _Jv_CheckAccess (jclass self_klass, jclass other_klass,
 271                           jint flags);
 272 jclass _Jv_GetArrayClass (jclass klass, java::lang::ClassLoader *loader);
 273
 274 jboolean _Jv_IsInterpretedClass (jclass);
 275 jboolean _Jv_IsBinaryCompatibilityABI (jclass);
 276
 277 jboolean _Jv_IsPhantomClass (jclass);
 278
 279 void _Jv_CopyClassesToSystemLoader (gnu::gcj::runtime::SystemClassLoader *);
 280
 281 #ifdef INTERPRETER
 282 void _Jv_InitField (jobject, jclass, int);
 283 #endif
 284
 285 class _Jv_StackTrace;
 286 class _Jv_BytecodeVerifier;
 287 class java::io::VMObjectStreamClass;
 288
 289 void _Jv_sharedlib_register_hook (jclass klass);
 290
 291
 292 class java::lang::Class : public java::lang::Object
 293 {
 294 public:
 295   static jclass forName (jstring className, jboolean initialize,
 296                          java::lang::ClassLoader *loader);
 297   static jclass forName (jstring className);
 298   JArray<jclass> *getClasses (void);
 299
 300   java::lang::ClassLoader *getClassLoader (void);
 301 private:
 302   java::lang::ClassLoader *getClassLoader (jclass caller);
 303 public:
 304   // This is an internal method that circumvents the usual security
 305   // checks when getting the class loader.
 306   java::lang::ClassLoader *getClassLoaderInternal (void)
 307   {
 308     return loader;
 309   }
 310
 311   java::lang::reflect::Constructor *getConstructor (JArray<jclass> *);
 312   JArray<java::lang::reflect::Constructor *> *getConstructors (void);
 313   java::lang::reflect::Constructor *getDeclaredConstructor (JArray<jclass> *);
 314   JArray<java::lang::reflect::Constructor *> *getDeclaredConstructors (jboolean);
 315   java::lang::reflect::Field *getDeclaredField (jstring);
 316   JArray<java::lang::reflect::Field *> *getDeclaredFields ();
 317   JArray<java::lang::reflect::Field *> *getDeclaredFields (jboolean);
 318   java::lang::reflect::Method *getDeclaredMethod (jstring, JArray<jclass> *);
 319   JArray<java::lang::reflect::Method *> *getDeclaredMethods (void);
 320
 321   JArray<jclass> *getDeclaredClasses (void);
 322   JArray<jclass> *getDeclaredClasses (jboolean);
 323   jclass getDeclaringClass (void);
 324
 325   java::lang::reflect::Field *getField (jstring);
 326 private:
 327   JArray<java::lang::reflect::Field *> internalGetFields ();
 328   java::lang::reflect::Field *getField (jstring, jint);
 329   jint _getMethods (JArray<java::lang::reflect::Method *> *result,
 330                     jint offset);
 331   java::lang::reflect::Field *getPrivateField (jstring);
 332   java::lang::reflect::Method *getPrivateMethod (jstring, JArray<jclass> *);
 333   java::security::ProtectionDomain *getProtectionDomain0 ();
 334
 335   java::lang::reflect::Method *_getMethod (jstring, JArray<jclass> *);
 336   java::lang::reflect::Method *_getDeclaredMethod (jstring, JArray<jclass> *);
 337
 338 public:
 339   JArray<java::lang::reflect::Field *> *getFields (void);
 340
 341   JArray<jclass> *getInterfaces (void);
 342
 343   void getSignature (java::lang::StringBuffer *buffer);
 344   static jstring getSignature (JArray<jclass> *, jboolean is_constructor);
 345   JArray<java::lang::reflect::Method *> *getMethods (void);
 346
 347   inline jint getModifiers (void)
 348   {
 349     return accflags & java::lang::reflect::Modifier::ALL_FLAGS;
 350   }
 351
 352   jstring getName (void);
 353
 354   java::net::URL        *getResource (jstring resourceName);
 355   java::io::InputStream *getResourceAsStream (jstring resourceName);
 356   JArray<jobject> *getSigners (void);
 357   void setSigners(JArray<jobject> *);
 358
 359   inline jclass getSuperclass (void)
 360   {
 361     return superclass;
 362   }
 363
 364   inline jclass getInterface (jint n)
 365   {
 366     return interfaces[n];
 367   }
 368
 369   inline jboolean isArray (void)
 370     {
 371       return name->first() == '[';
 372     }
 373
 374   inline jclass getComponentType (void)
 375     {
 376       return isArray () ? element_type : 0;
 377     }
 378
 379   jboolean isAssignableFrom (jclass cls);
 380   jboolean isInstance (jobject obj);
 381
 382   inline jboolean isInterface (void)
 383   {
 384     return (accflags & java::lang::reflect::Modifier::INTERFACE) != 0;
 385   }
 386
 387   inline jboolean isPrimitive (void)
 388     {
 389       return vtable == JV_PRIMITIVE_VTABLE;
 390     }
 391
 392   jobject newInstance (void);
 393   java::security::ProtectionDomain *getProtectionDomain (void);
 394   java::lang::Package *getPackage (void);
 395   jstring toString (void);
 396   jboolean desiredAssertionStatus (void);
 397
 398   // FIXME: this probably shouldn't be public.
 399   jint size (void)
 400   {
 401     return size_in_bytes;
 402   }
 403
 404   // The index of the first method we declare ourself (as opposed to
 405   // inheriting).
 406   inline jint firstMethodIndex (void)
 407   {
 408     return vtable_method_count - method_count;
 409   }
 410
 411   // finalization
 412   void finalize ();
 413
 414   // This constructor is used to create Class object for the primitive
 415   // types. See prims.cc.
 416   Class ();
 417
 418   static java::lang::Class class$;
 419
 420 private:
 421
 422   void memberAccessCheck (jint flags);
 423
 424   void initializeClass (void);
 425
 426   static jstring getPackagePortion (jstring);
 427
 428   void set_state (jint nstate)
 429   {
 430     state = nstate;
 431     notifyAll ();
 432   }
 433
 434   // Friend functions implemented in natClass.cc.
 435   friend _Jv_Method *::_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
 436                                            _Jv_Utf8Const *signature);
 437   friend jboolean (::_Jv_IsAssignableFrom) (jclass, jclass);
 438   friend jboolean (::_Jv_IsAssignableFromSlow) (jclass, jclass);
 439   friend jboolean (::_Jv_InterfaceAssignableFrom) (jclass, jclass);
 440   friend void *::_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
 441                                                int method_idx);
 442
 443   friend void ::_Jv_InitClass (jclass klass);
 444   friend java::lang::Class* ::_Jv_NewClassFromInitializer (const jclass class_initializer);
 445   friend void _Jv_RegisterNewClasses (void **classes);
 446
 447   friend _Jv_Method* ::_Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
 448                                                  _Jv_Utf8Const*, jclass *);
 449   friend jfieldID (::JvGetFirstInstanceField) (jclass);
 450   friend jint (::JvNumInstanceFields) (jclass);
 451   friend jfieldID (::JvGetFirstStaticField) (jclass);
 452   friend jint (::JvNumStaticFields) (jclass);
 453
 454   friend jobject (::_Jv_AllocObject) (jclass);
 455   friend void *::_Jv_AllocObj (jint, jclass);
 456   friend void *::_Jv_AllocPtrFreeObj (jint, jclass);
 457   friend void *::_Jv_AllocArray (jint, jclass);
 458
 459   friend jobject (::_Jv_JNI_ToReflectedField) (_Jv_JNIEnv *, jclass, jfieldID,
 460                                                jboolean);
 461   friend jobject (::_Jv_JNI_ToReflectedMethod) (_Jv_JNIEnv *, jclass, jmethodID,
 462                                                 jboolean);
 463   friend jfieldID (::_Jv_FromReflectedField) (java::lang::reflect::Field *);
 464
 465   friend jmethodID (::_Jv_FromReflectedMethod) (java::lang::reflect::Method *);
 466   friend jmethodID (::_Jv_FromReflectedConstructor) (java::lang::reflect::Constructor *);
 467   friend jint (::JvNumMethods) (jclass);
 468   friend jmethodID (::JvGetFirstMethod) (jclass);
 469 #ifdef INTERPRETER
 470   friend _Jv_InterpMethod* (::_Jv_FindInterpreterMethod) (jclass klass,
 471                                                           jmethodID desired_method);
 472 #endif
 473
 474   // Friends classes and functions to implement the ClassLoader
 475   friend class java::lang::ClassLoader;
 476   friend class java::lang::VMClassLoader;
 477
 478   friend class java::io::ObjectOutputStream;
 479   friend class java::io::ObjectInputStream;
 480   friend class java::io::ObjectStreamClass;
 481
 482   friend void ::_Jv_RegisterClasses (const jclass *classes);
 483   friend void ::_Jv_RegisterClasses_Counted (const jclass *classes,
 484                                              size_t count);
 485   friend void ::_Jv_RegisterClassHookDefault (jclass klass);
 486   friend void ::_Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 487   friend void ::_Jv_UnregisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 488   friend void ::_Jv_UnregisterClass (jclass);
 489   friend jclass (::_Jv_FindClassNoException) (_Jv_Utf8Const *name,
 490                                    java::lang::ClassLoader *loader);
 491   friend jclass (::_Jv_FindClass) (_Jv_Utf8Const *name,
 492                                    java::lang::ClassLoader *loader);
 493   friend jclass (::_Jv_FindClassInCache) (_Jv_Utf8Const *name);
 494   friend jclass (::_Jv_PopClass) (void);
 495   friend void ::_Jv_PushClass (jclass k);
 496   friend void ::_Jv_NewArrayClass (jclass element,
 497                                    java::lang::ClassLoader *loader,
 498                                    _Jv_VTable *array_vtable);
 499   friend jclass (::_Jv_NewClass) (_Jv_Utf8Const *name, jclass superclass,
 500                                   java::lang::ClassLoader *loader);
 501   friend void ::_Jv_InitNewClassFields (jclass klass);
 502
 503   // in prims.cc
 504   friend void ::_Jv_InitPrimClass (jclass, const char *, char, int);
 505
 506   friend jstring (::_Jv_GetMethodString) (jclass, _Jv_Method *, jclass);
 507
 508   friend jboolean (::_Jv_CheckAccess) (jclass self_klass, jclass other_klass,
 509                                    jint flags);
 510
 511   friend bool (::_Jv_getInterfaceMethod) (jclass, jclass&, int&,
 512                                           const _Jv_Utf8Const*,
 513                                           const _Jv_Utf8Const*);
 514
 515   friend jclass (::_Jv_GetArrayClass) (jclass klass,
 516                                        java::lang::ClassLoader *loader);
 517
 518   friend jboolean (::_Jv_IsInterpretedClass) (jclass);
 519   friend jboolean (::_Jv_IsBinaryCompatibilityABI) (jclass);
 520
 521   friend jboolean (::_Jv_IsPhantomClass) (jclass);
 522
 523 #ifdef INTERPRETER
 524   friend void ::_Jv_InitField (jobject, jclass, int);
 525
 526   friend class ::_Jv_ClassReader;
 527   friend class ::_Jv_InterpClass;
 528   friend class ::_Jv_InterpMethod;
 529 #endif
 530   friend class ::_Jv_StackTrace;
 531
 532 #ifdef JV_MARKOBJ_DECL
 533   friend JV_MARKOBJ_DECL;
 534 #endif
 535
 536   friend class ::_Jv_BytecodeVerifier;
 537   friend class java::io::VMObjectStreamClass;
 538
 539   friend class ::_Jv_Linker;
 540   friend class ::_Jv_ExecutionEngine;
 541   friend class ::_Jv_CompiledEngine;
 542   friend class ::_Jv_IndirectCompiledEngine;
 543   friend class ::_Jv_InterpreterEngine;
 544
 545   friend void ::_Jv_sharedlib_register_hook (jclass klass);
 546
 547   friend void *::_Jv_ResolvePoolEntry (jclass this_class, jint index);
 548
 549   friend void ::_Jv_CopyClassesToSystemLoader (gnu::gcj::runtime::SystemClassLoader *);
 550
 551   // Chain for class pool.  This also doubles as the ABI version
 552   // number.  It is only used for this purpose at class registration
 553   // time, and only for precompiled classes.
 554   jclass next_or_version;
 555   // Name of class.
 556   _Jv_Utf8Const *name;
 557   // Access flags for class.
 558   _Jv_ushort accflags;
 559   // The superclass, or null for Object.
 560   jclass superclass;
 561   // Class constants.
 562   _Jv_Constants constants;
 563   // Methods.  If this is an array class, then this field holds a
 564   // pointer to the element type.
 565   union
 566   {
 567     _Jv_Method *methods;
 568     jclass element_type;
 569   };
 570   // Number of methods.  If this class is primitive, this holds the
 571   // character used to represent this type in a signature.
 572   jshort method_count;
 573   // Number of methods in the vtable.
 574   jshort vtable_method_count;
 575   // The fields.
 576   _Jv_Field *fields;
 577   // Size of instance fields, in bytes.
 578   jint size_in_bytes;
 579   // Total number of fields (instance and static).
 580   jshort field_count;
 581   // Number of static fields.
 582   jshort static_field_count;
 583   // The vtbl for all objects of this class.
 584   _Jv_VTable *vtable;
 585   // Virtual method offset table.
 586   _Jv_OffsetTable *otable;
 587   // Offset table symbols.
 588   _Jv_MethodSymbol *otable_syms;
 589   // Address table
 590   _Jv_AddressTable *atable;
 591   _Jv_MethodSymbol *atable_syms;
 592   // Interface table
 593   _Jv_AddressTable *itable;
 594   _Jv_MethodSymbol *itable_syms;
 595   _Jv_CatchClass *catch_classes;
 596   // Interfaces implemented by this class.
 597   jclass *interfaces;
 598   // The class loader for this class.
 599   java::lang::ClassLoader *loader;
 600   // Number of interfaces.
 601   jshort interface_count;
 602   // State of this class.
 603   jbyte state;
 604   // The thread which has locked this class.  Used during class
 605   // initialization.
 606   java::lang::Thread *thread;
 607   // How many levels of "extends" this class is removed from Object.
 608   jshort depth;
 609   // Vector of this class's superclasses, ordered by decreasing depth.
 610   jclass *ancestors;
 611   // In a regular class, this field points to the Class Interface Dispatch
 612   // Table. In an interface, it points to the ioffsets table.
 613   union
 614   {
 615     _Jv_IDispatchTable *idt;
 616     jshort *ioffsets;
 617   };
 618   // Pointer to the class that represents an array of this class.
 619   jclass arrayclass;
 620   // Security Domain to which this class belongs (or null).
 621   java::security::ProtectionDomain *protectionDomain;
 622   // Pointer to the type assertion table for this class.
 623   _Jv_TypeAssertion *assertion_table;
 624   // Signers of this class (or null).
 625   JArray<jobject> *hack_signers;
 626   // Used by Jv_PopClass and _Jv_PushClass to communicate with StackTrace.
 627   jclass chain;
 628   // Additional data, specific to the generator (JIT, native,
 629   // interpreter) of this class.
 630   void *aux_info;
 631   // Execution engine.
 632   _Jv_ExecutionEngine *engine;
 633 };
 634
 635 // Inline functions that are friends of java::lang::Class
 636
 637 inline void _Jv_InitClass (jclass klass)
 638 {
 639   if (__builtin_expect (klass->state == JV_STATE_DONE, true))
 640     return;
 641   klass->initializeClass ();
 642 }
 643
 644 // Return array class corresponding to element type KLASS, creating it if
 645 // necessary.
 646 inline jclass
 647 _Jv_GetArrayClass (jclass klass, java::lang::ClassLoader *loader)
 648 {
 649   extern void _Jv_NewArrayClass (jclass element,
 650                                  java::lang::ClassLoader *loader,
 651                                  _Jv_VTable *array_vtable = 0);
 652   if (__builtin_expect (!klass->arrayclass, false))
 653     _Jv_NewArrayClass (klass, loader);
 654   return klass->arrayclass;
 655 }
 656
 657 #endif /* __JAVA_LANG_CLASS_H__ */