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 char *class_initializer);
  44 extern "C" void _Jv_RegisterNewClasses (char **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 typedef enum
 196 {
 197   JV_CLASS_ATTR,
 198   JV_METHOD_ATTR,
 199   JV_FIELD_ATTR,
 200   JV_DONE_ATTR
 201 } jv_attr_type;
 202
 203 typedef enum
 204 {
 205   JV_INNER_CLASSES_KIND,
 206   JV_ENCLOSING_METHOD_KIND,
 207   JV_SIGNATURE_KIND,
 208   JV_ANNOTATIONS_KIND,
 209   JV_PARAMETER_ANNOTATIONS_KIND,
 210   JV_ANNOTATION_DEFAULT_KIND
 211 } jv_attr_kind;
 212
 213 #define JV_PRIMITIVE_VTABLE ((_Jv_VTable *) -1)
 214
 215 #define JV_CLASS(Obj) ((jclass) (*(_Jv_VTable **) Obj)->clas)
 216
 217 // Forward declarations for friends of java::lang::Class
 218
 219 // Friend functions implemented in natClass.cc.
 220 _Jv_Method *_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
 221                                 _Jv_Utf8Const *signature);
 222 jboolean _Jv_IsAssignableFrom (jclass, jclass);
 223 jboolean _Jv_IsAssignableFromSlow (jclass, jclass);
 224 jboolean _Jv_InterfaceAssignableFrom (jclass, jclass);
 225
 226 _Jv_Method* _Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
 227                                       _Jv_Utf8Const*, jclass * = NULL);
 228 jfieldID JvGetFirstInstanceField (jclass);
 229 jint JvNumInstanceFields (jclass);
 230 jfieldID JvGetFirstStaticField (jclass);
 231 jint JvNumStaticFields (jclass);
 232
 233 jobject _Jv_AllocObject (jclass);
 234 void *_Jv_AllocObj (jint, jclass);
 235 void *_Jv_AllocPtrFreeObj (jint, jclass);
 236 void *_Jv_AllocArray (jint, jclass);
 237
 238 bool _Jv_getInterfaceMethod(jclass, jclass&, int&,
 239                             const _Jv_Utf8Const*,
 240                             const _Jv_Utf8Const*);
 241
 242 jobject _Jv_JNI_ToReflectedField (_Jv_JNIEnv *, jclass, jfieldID,
 243                                   jboolean);
 244 jobject _Jv_JNI_ToReflectedMethod (_Jv_JNIEnv *, jclass, jmethodID,
 245                                    jboolean);
 246 jfieldID _Jv_FromReflectedField (java::lang::reflect::Field *);
 247
 248 jmethodID _Jv_FromReflectedMethod (java::lang::reflect::Method *);
 249 jmethodID _Jv_FromReflectedConstructor (java::lang::reflect::Constructor *);
 250 jint JvNumMethods (jclass);
 251 jmethodID JvGetFirstMethod (jclass);
 252 _Jv_Utf8Const *_Jv_GetClassNameUtf8 (jclass);
 253
 254 #ifdef INTERPRETER
 255 // Finds a desired interpreter method in the given class or NULL if not found
 256 class _Jv_MethodBase;
 257 _Jv_MethodBase *_Jv_FindInterpreterMethod (jclass, jmethodID);
 258 #endif
 259
 260 // Friend classes and functions to implement the ClassLoader
 261 class java::lang::ClassLoader;
 262 class java::lang::VMClassLoader;
 263
 264 class java::io::ObjectOutputStream;
 265 class java::io::ObjectInputStream;
 266 class java::io::ObjectStreamClass;
 267
 268 void _Jv_RegisterClassHookDefault (jclass klass);
 269 void _Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 270 void _Jv_UnregisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 271 void _Jv_UnregisterClass (jclass);
 272 jclass _Jv_FindClassNoException (_Jv_Utf8Const *name,
 273                       java::lang::ClassLoader *loader);
 274 jclass _Jv_FindClass (_Jv_Utf8Const *name,
 275                       java::lang::ClassLoader *loader);
 276 jclass _Jv_FindClassInCache (_Jv_Utf8Const *name);
 277 jclass _Jv_PopClass (void);
 278 void _Jv_PushClass (jclass k);
 279 void _Jv_NewArrayClass (jclass element,
 280                         java::lang::ClassLoader *loader,
 281                         _Jv_VTable *array_vtable = 0);
 282 jclass _Jv_NewClass (_Jv_Utf8Const *name, jclass superclass,
 283                      java::lang::ClassLoader *loader);
 284 void _Jv_InitNewClassFields (jclass klass);
 285
 286 // Friend functions and classes in prims.cc
 287 void _Jv_InitPrimClass (jclass, const char *, char, int);
 288 jstring _Jv_GetMethodString (jclass, _Jv_Method *, jclass = NULL);
 289
 290 jboolean _Jv_CheckAccess (jclass self_klass, jclass other_klass,
 291                           jint flags);
 292 jclass _Jv_GetArrayClass (jclass klass, java::lang::ClassLoader *loader);
 293
 294 jboolean _Jv_IsInterpretedClass (jclass);
 295 jboolean _Jv_IsBinaryCompatibilityABI (jclass);
 296
 297 jboolean _Jv_IsPhantomClass (jclass);
 298
 299 void _Jv_CopyClassesToSystemLoader (gnu::gcj::runtime::SystemClassLoader *);
 300
 301 #ifdef INTERPRETER
 302 void _Jv_InitField (jobject, jclass, int);
 303 #endif
 304
 305 class _Jv_StackTrace;
 306 class _Jv_BytecodeVerifier;
 307 class java::io::VMObjectStreamClass;
 308
 309 void _Jv_sharedlib_register_hook (jclass klass);
 310
 311 /* Find the class that defines the given method. Returns NULL
 312    if it cannot be found. Searches both interpreted and native
 313    classes. */
 314 jclass _Jv_GetMethodDeclaringClass (jmethodID method);
 315
 316 class java::lang::Class : public java::lang::Object
 317 {
 318 public:
 319   static jclass forName (jstring className, jboolean initialize,
 320                          java::lang::ClassLoader *loader);
 321   static jclass forName (jstring className);
 322   JArray<jclass> *getClasses (void);
 323
 324   java::lang::ClassLoader *getClassLoader (void);
 325 private:
 326   java::lang::ClassLoader *getClassLoader (jclass caller);
 327 public:
 328   // This is an internal method that circumvents the usual security
 329   // checks when getting the class loader.
 330   java::lang::ClassLoader *getClassLoaderInternal (void)
 331   {
 332     return loader;
 333   }
 334
 335   java::lang::reflect::Constructor *getConstructor (JArray<jclass> *);
 336   JArray<java::lang::reflect::Constructor *> *getConstructors (void);
 337   java::lang::reflect::Constructor *getDeclaredConstructor (JArray<jclass> *);
 338   JArray<java::lang::reflect::Constructor *> *getDeclaredConstructors (jboolean);
 339   java::lang::reflect::Field *getDeclaredField (jstring);
 340   JArray<java::lang::reflect::Field *> *getDeclaredFields ();
 341   JArray<java::lang::reflect::Field *> *getDeclaredFields (jboolean);
 342   java::lang::reflect::Method *getDeclaredMethod (jstring, JArray<jclass> *);
 343   JArray<java::lang::reflect::Method *> *getDeclaredMethods (void);
 344
 345   JArray<jclass> *getDeclaredClasses (void);
 346   JArray<jclass> *getDeclaredClasses (jboolean);
 347   jclass getDeclaringClass (void);
 348
 349   java::lang::reflect::Field *getField (jstring);
 350 private:
 351   JArray<java::lang::reflect::Field *> internalGetFields ();
 352   java::lang::reflect::Field *getField (jstring, jint);
 353   jint _getMethods (JArray<java::lang::reflect::Method *> *result,
 354                     jint offset);
 355   java::lang::reflect::Field *getPrivateField (jstring);
 356   java::lang::reflect::Method *getPrivateMethod (jstring, JArray<jclass> *);
 357   java::security::ProtectionDomain *getProtectionDomain0 ();
 358
 359   java::lang::reflect::Method *_getMethod (jstring, JArray<jclass> *);
 360   java::lang::reflect::Method *_getDeclaredMethod (jstring, JArray<jclass> *);
 361
 362   jstring getReflectionSignature (jint /*jv_attr_type*/ type,
 363                                   jint obj_index);
 364   jstring getReflectionSignature (::java::lang::reflect::Method *);
 365   jstring getReflectionSignature (::java::lang::reflect::Constructor *);
 366   jstring getReflectionSignature (::java::lang::reflect::Field *);
 367
 368   jstring getClassSignature();
 369   jobject getMethodDefaultValue (::java::lang::reflect::Method *);
 370
 371 public:
 372   JArray<java::lang::reflect::Field *> *getFields (void);
 373
 374   JArray<jclass> *getInterfaces (void);
 375
 376   void getSignature (java::lang::StringBuffer *buffer);
 377   static jstring getSignature (JArray<jclass> *, jboolean is_constructor);
 378   JArray<java::lang::reflect::Method *> *getMethods (void);
 379
 380   inline jint getModifiers (void)
 381   {
 382     return accflags & java::lang::reflect::Modifier::ALL_FLAGS;
 383   }
 384
 385   jstring getName (void);
 386
 387   java::net::URL        *getResource (jstring resourceName);
 388   java::io::InputStream *getResourceAsStream (jstring resourceName);
 389   JArray<jobject> *getSigners (void);
 390   void setSigners(JArray<jobject> *);
 391
 392   inline jclass getSuperclass (void)
 393   {
 394     return superclass;
 395   }
 396
 397   inline jclass getInterface (jint n)
 398   {
 399     return interfaces[n];
 400   }
 401
 402   inline jboolean isArray (void)
 403     {
 404       return name->first() == '[';
 405     }
 406
 407   inline jclass getComponentType (void)
 408     {
 409       return isArray () ? element_type : 0;
 410     }
 411
 412   jboolean isAssignableFrom (jclass cls);
 413   jboolean isInstance (jobject obj);
 414
 415   inline jboolean isInterface (void)
 416   {
 417     return (accflags & java::lang::reflect::Modifier::INTERFACE) != 0;
 418   }
 419
 420   inline jboolean isPrimitive (void)
 421     {
 422       return vtable == JV_PRIMITIVE_VTABLE;
 423     }
 424
 425   jobject newInstance (void);
 426   java::security::ProtectionDomain *getProtectionDomain (void);
 427   java::lang::Package *getPackage (void);
 428   jstring toString (void);
 429   jboolean desiredAssertionStatus (void);
 430
 431   JArray<java::lang::reflect::TypeVariable *> *getTypeParameters (void);
 432
 433   jint getEnclosingMethodData(void);
 434   java::lang::Class *getEnclosingClass (void);
 435   java::lang::reflect::Constructor *getEnclosingConstructor (void);
 436   java::lang::reflect::Method *getEnclosingMethod (void);
 437   jobjectArray getDeclaredAnnotations(jint, jint, jint);
 438   jobjectArray getDeclaredAnnotations(::java::lang::reflect::Method *,
 439                                       jboolean);
 440   jobjectArray getDeclaredAnnotations(::java::lang::reflect::Constructor *,
 441                                       jboolean);
 442   jobjectArray getDeclaredAnnotations(::java::lang::reflect::Field *);
 443   JArray< ::java::lang::annotation::Annotation *> *getDeclaredAnnotationsInternal();
 444
 445   jboolean isEnum (void)
 446   {
 447     return (accflags & 0x4000) != 0;
 448   }
 449   jboolean isSynthetic (void)
 450   {
 451     return (accflags & 0x1000) != 0;
 452   }
 453   jboolean isAnnotation (void)
 454   {
 455     return (accflags & 0x2000) != 0;
 456   }
 457
 458   jboolean isAnonymousClass();
 459   jboolean isLocalClass();
 460   jboolean isMemberClass();
 461
 462   // FIXME: this probably shouldn't be public.
 463   jint size (void)
 464   {
 465     return size_in_bytes;
 466   }
 467
 468   // The index of the first method we declare ourself (as opposed to
 469   // inheriting).
 470   inline jint firstMethodIndex (void)
 471   {
 472     return vtable_method_count - method_count;
 473   }
 474
 475   // finalization
 476   void finalize ();
 477
 478   // This constructor is used to create Class object for the primitive
 479   // types. See prims.cc.
 480   Class ();
 481
 482   // Given the BC ABI version, return the size of an Class initializer.
 483   static jlong initializerSize (jlong ABI)
 484   {
 485     unsigned long version = ABI & 0xfffff;
 486     int abi_rev = version % 100;
 487
 488     // The reflection_data field was added by abi_rev 1.
 489     if (abi_rev == 0)
 490       return ((char*)(&::java::lang::Class::class$.reflection_data)
 491               - (char*)&::java::lang::Class::class$);
 492
 493     return sizeof (::java::lang::Class);
 494   }
 495
 496   static java::lang::Class class$;
 497
 498 private:
 499
 500   void memberAccessCheck (jint flags);
 501
 502   void initializeClass (void);
 503
 504   static jstring getPackagePortion (jstring);
 505
 506   void set_state (jint nstate)
 507   {
 508     state = nstate;
 509     notifyAll ();
 510   }
 511
 512   jint findInnerClassAttribute();
 513   jint findDeclaredClasses(JArray<jclass> *, jboolean, jint);
 514
 515   // Friend functions implemented in natClass.cc.
 516   friend _Jv_Method *::_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
 517                                            _Jv_Utf8Const *signature);
 518   friend jboolean (::_Jv_IsAssignableFrom) (jclass, jclass);
 519   friend jboolean (::_Jv_IsAssignableFromSlow) (jclass, jclass);
 520   friend jboolean (::_Jv_InterfaceAssignableFrom) (jclass, jclass);
 521   friend void *::_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
 522                                                int method_idx);
 523
 524   friend void ::_Jv_InitClass (jclass klass);
 525   friend java::lang::Class* ::_Jv_NewClassFromInitializer (const char *class_initializer);
 526   friend void _Jv_RegisterNewClasses (void **classes);
 527
 528   friend _Jv_Method* ::_Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
 529                                                  _Jv_Utf8Const*, jclass *);
 530   friend jfieldID (::JvGetFirstInstanceField) (jclass);
 531   friend jint (::JvNumInstanceFields) (jclass);
 532   friend jfieldID (::JvGetFirstStaticField) (jclass);
 533   friend jint (::JvNumStaticFields) (jclass);
 534
 535   friend jobject (::_Jv_AllocObject) (jclass);
 536   friend void *::_Jv_AllocObj (jint, jclass);
 537   friend void *::_Jv_AllocPtrFreeObj (jint, jclass);
 538   friend void *::_Jv_AllocArray (jint, jclass);
 539
 540   friend jobject (::_Jv_JNI_ToReflectedField) (_Jv_JNIEnv *, jclass, jfieldID,
 541                                                jboolean);
 542   friend jobject (::_Jv_JNI_ToReflectedMethod) (_Jv_JNIEnv *, jclass, jmethodID,
 543                                                 jboolean);
 544   friend jfieldID (::_Jv_FromReflectedField) (java::lang::reflect::Field *);
 545
 546   friend jmethodID (::_Jv_FromReflectedMethod) (java::lang::reflect::Method *);
 547   friend jmethodID (::_Jv_FromReflectedConstructor) (java::lang::reflect::Constructor *);
 548   friend jint (::JvNumMethods) (jclass);
 549   friend jmethodID (::JvGetFirstMethod) (jclass);
 550   friend _Jv_Utf8Const *::_Jv_GetClassNameUtf8 (jclass);
 551 #ifdef INTERPRETER
 552   friend _Jv_MethodBase *(::_Jv_FindInterpreterMethod) (jclass klass,
 553                                                         jmethodID desired_method);
 554 #endif
 555
 556   // Friends classes and functions to implement the ClassLoader
 557   friend class java::lang::ClassLoader;
 558   friend class java::lang::VMClassLoader;
 559
 560   friend class java::io::ObjectOutputStream;
 561   friend class java::io::ObjectInputStream;
 562   friend class java::io::ObjectStreamClass;
 563
 564   friend void ::_Jv_RegisterClasses (const jclass *classes);
 565   friend void ::_Jv_RegisterClasses_Counted (const jclass *classes,
 566                                              size_t count);
 567   friend void ::_Jv_RegisterClassHookDefault (jclass klass);
 568   friend void ::_Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 569   friend void ::_Jv_UnregisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 570   friend void ::_Jv_UnregisterClass (jclass);
 571   friend jclass (::_Jv_FindClassNoException) (_Jv_Utf8Const *name,
 572                                    java::lang::ClassLoader *loader);
 573   friend jclass (::_Jv_FindClass) (_Jv_Utf8Const *name,
 574                                    java::lang::ClassLoader *loader);
 575   friend jclass (::_Jv_FindClassInCache) (_Jv_Utf8Const *name);
 576   friend jclass (::_Jv_PopClass) (void);
 577   friend void ::_Jv_PushClass (jclass k);
 578   friend void ::_Jv_NewArrayClass (jclass element,
 579                                    java::lang::ClassLoader *loader,
 580                                    _Jv_VTable *array_vtable);
 581   friend jclass (::_Jv_NewClass) (_Jv_Utf8Const *name, jclass superclass,
 582                                   java::lang::ClassLoader *loader);
 583   friend void ::_Jv_InitNewClassFields (jclass klass);
 584
 585   // in prims.cc
 586   friend void ::_Jv_InitPrimClass (jclass, const char *, char, int);
 587
 588   friend jstring (::_Jv_GetMethodString) (jclass, _Jv_Method *, jclass);
 589
 590   friend jboolean (::_Jv_CheckAccess) (jclass self_klass, jclass other_klass,
 591                                    jint flags);
 592
 593   friend bool (::_Jv_getInterfaceMethod) (jclass, jclass&, int&,
 594                                           const _Jv_Utf8Const*,
 595                                           const _Jv_Utf8Const*);
 596
 597   friend jclass (::_Jv_GetArrayClass) (jclass klass,
 598                                        java::lang::ClassLoader *loader);
 599
 600   friend jboolean (::_Jv_IsInterpretedClass) (jclass);
 601   friend jboolean (::_Jv_IsBinaryCompatibilityABI) (jclass);
 602
 603   friend jboolean (::_Jv_IsPhantomClass) (jclass);
 604
 605 #ifdef INTERPRETER
 606   friend void ::_Jv_InitField (jobject, jclass, int);
 607
 608   friend class ::_Jv_ClassReader;
 609   friend class ::_Jv_InterpClass;
 610   friend class ::_Jv_InterpMethod;
 611 #endif
 612   friend class ::_Jv_StackTrace;
 613
 614 #ifdef JV_MARKOBJ_DECL
 615   friend JV_MARKOBJ_DECL;
 616 #endif
 617
 618   friend class ::_Jv_BytecodeVerifier;
 619   friend class java::io::VMObjectStreamClass;
 620
 621   friend class ::_Jv_Linker;
 622   friend class ::_Jv_ExecutionEngine;
 623   friend class ::_Jv_CompiledEngine;
 624   friend class ::_Jv_IndirectCompiledEngine;
 625   friend class ::_Jv_InterpreterEngine;
 626
 627   friend void ::_Jv_sharedlib_register_hook (jclass klass);
 628
 629   friend void *::_Jv_ResolvePoolEntry (jclass this_class, jint index);
 630
 631   friend void ::_Jv_CopyClassesToSystemLoader (gnu::gcj::runtime::SystemClassLoader *);
 632
 633   friend class java::lang::reflect::Field;
 634   friend class java::lang::reflect::Method;
 635   friend class java::lang::reflect::Constructor;
 636   friend class java::lang::reflect::VMProxy;
 637
 638   // Chain for class pool.  This also doubles as the ABI version
 639   // number.  It is only used for this purpose at class registration
 640   // time, and only for precompiled classes.
 641   jclass next_or_version;
 642   // Name of class.
 643   _Jv_Utf8Const *name;
 644   // Access flags for class.
 645   _Jv_ushort accflags;
 646   // The superclass, or null for Object.
 647   jclass superclass;
 648   // Class constants.
 649   _Jv_Constants constants;
 650   // Methods.  If this is an array class, then this field holds a
 651   // pointer to the element type.
 652   union
 653   {
 654     _Jv_Method *methods;
 655     jclass element_type;
 656   };
 657   // Number of methods.  If this class is primitive, this holds the
 658   // character used to represent this type in a signature.
 659   jshort method_count;
 660   // Number of methods in the vtable.
 661   jshort vtable_method_count;
 662   // The fields.
 663   _Jv_Field *fields;
 664   // Size of instance fields, in bytes.
 665   jint size_in_bytes;
 666   // Total number of fields (instance and static).
 667   jshort field_count;
 668   // Number of static fields.
 669   jshort static_field_count;
 670   // The vtbl for all objects of this class.
 671   _Jv_VTable *vtable;
 672   // Virtual method offset table.
 673   _Jv_OffsetTable *otable;
 674   // Offset table symbols.
 675   _Jv_MethodSymbol *otable_syms;
 676   // Address table
 677   _Jv_AddressTable *atable;
 678   _Jv_MethodSymbol *atable_syms;
 679   // Interface table
 680   _Jv_AddressTable *itable;
 681   _Jv_MethodSymbol *itable_syms;
 682   _Jv_CatchClass *catch_classes;
 683   // Interfaces implemented by this class.
 684   jclass *interfaces;
 685   // The class loader for this class.
 686   java::lang::ClassLoader *loader;
 687   // Number of interfaces.
 688   jshort interface_count;
 689   // State of this class.
 690   jbyte state;
 691   // The thread which has locked this class.  Used during class
 692   // initialization.
 693   java::lang::Thread *thread;
 694   // How many levels of "extends" this class is removed from Object.
 695   jshort depth;
 696   // Vector of this class's superclasses, ordered by decreasing depth.
 697   jclass *ancestors;
 698   // In a regular class, this field points to the Class Interface Dispatch
 699   // Table. In an interface, it points to the ioffsets table.
 700   union
 701   {
 702     _Jv_IDispatchTable *idt;
 703     jshort *ioffsets;
 704   };
 705   // Pointer to the class that represents an array of this class.
 706   jclass arrayclass;
 707   // Security Domain to which this class belongs (or null).
 708   java::security::ProtectionDomain *protectionDomain;
 709   // Pointer to the type assertion table for this class.
 710   _Jv_TypeAssertion *assertion_table;
 711   // Signers of this class (or null).
 712   JArray<jobject> *hack_signers;
 713   // Used by Jv_PopClass and _Jv_PushClass to communicate with StackTrace.
 714   jclass chain;
 715   // Additional data, specific to the generator (JIT, native,
 716   // interpreter) of this class.
 717   void *aux_info;
 718   // Execution engine.
 719   _Jv_ExecutionEngine *engine;
 720   // Reflection data.
 721   unsigned char *reflection_data;
 722 };
 723
 724 // Inline functions that are friends of java::lang::Class
 725
 726 inline void _Jv_InitClass (jclass klass)
 727 {
 728   if (__builtin_expect (klass->state == JV_STATE_DONE, true))
 729     return;
 730   klass->initializeClass ();
 731 }
 732
 733 // Return array class corresponding to element type KLASS, creating it if
 734 // necessary.
 735 inline jclass
 736 _Jv_GetArrayClass (jclass klass, java::lang::ClassLoader *loader)
 737 {
 738   extern void _Jv_NewArrayClass (jclass element,
 739                                  java::lang::ClassLoader *loader,
 740                                  _Jv_VTable *array_vtable = 0);
 741   if (__builtin_expect (!klass->arrayclass, false))
 742     _Jv_NewArrayClass (klass, loader);
 743   return klass->arrayclass;
 744 }
 745
 746 #endif /* __JAVA_LANG_CLASS_H__ */