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, 2007  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
 101 #ifdef INTERPRETER
 102 class _Jv_InterpreterEngine;
 103 class _Jv_ClassReader;
 104 class _Jv_InterpClass;
 105 class _Jv_InterpMethod;
 106 #endif
 107
 108 class _Jv_ClosureList
 109 {
 110   _Jv_ClosureList *next;
 111   void *ptr;
 112 public:
 113   void registerClosure (jclass klass, void *ptr);
 114   static void releaseClosures (_Jv_ClosureList **closures);
 115 };
 116
 117 struct _Jv_Constants
 118 {
 119   jint size;
 120   jbyte *tags;
 121   _Jv_word *data;
 122 };
 123
 124 struct _Jv_Method
 125 {
 126   // Method name.
 127   _Jv_Utf8Const *name;
 128   // Method signature.
 129   _Jv_Utf8Const *signature;
 130   // Access flags.
 131   _Jv_ushort accflags;
 132   // Method's index in the vtable.
 133   _Jv_ushort index;
 134   // Pointer to underlying function.
 135   void *ncode;
 136   // NULL-terminated list of exception class names; can be NULL if
 137   // there are none such.
 138   _Jv_Utf8Const **throws;
 139
 140   _Jv_Method *getNextMethod ()
 141   { return this + 1; }
 142 };
 143
 144 // The table used to resolve interface calls.
 145 struct _Jv_IDispatchTable
 146 {
 147   // Index into interface's ioffsets.
 148   jshort iindex;
 149   jshort itable_length;
 150   // Class Interface dispatch table.
 151   void *itable[0];
 152 };
 153
 154 // Used by _Jv_Linker::get_interfaces ()
 155 struct _Jv_ifaces
 156 {
 157   jclass *list;
 158   jshort len;
 159   jshort count;
 160 };
 161
 162 struct _Jv_MethodSymbol
 163 {
 164   _Jv_Utf8Const *class_name;
 165   _Jv_Utf8Const *name;
 166   _Jv_Utf8Const *signature;
 167 };
 168
 169 struct _Jv_OffsetTable
 170 {
 171   jint state;
 172   jint offsets[];
 173 };
 174
 175 struct _Jv_AddressTable
 176 {
 177   jint state;
 178   void *addresses[];
 179 };
 180
 181 struct _Jv_CatchClass
 182 {
 183   java::lang::Class **address;
 184   _Jv_Utf8Const *classname;
 185 };
 186
 187 // Possible values for the assertion_code field in the type assertion table.
 188 enum
 189 {
 190   JV_ASSERT_END_OF_TABLE = 0,
 191   JV_ASSERT_TYPES_COMPATIBLE = 1,
 192   JV_ASSERT_IS_INSTANTIABLE = 2
 193 };
 194
 195 // Entry in the type assertion table, used to validate type constraints
 196 // for binary compatibility.
 197 struct _Jv_TypeAssertion
 198 {
 199   jint assertion_code;
 200   _Jv_Utf8Const *op1;
 201   _Jv_Utf8Const *op2;
 202 };
 203
 204 typedef enum
 205 {
 206   JV_CLASS_ATTR,
 207   JV_METHOD_ATTR,
 208   JV_FIELD_ATTR,
 209   JV_DONE_ATTR
 210 } jv_attr_type;
 211
 212 typedef enum
 213 {
 214   JV_INNER_CLASSES_KIND,
 215   JV_ENCLOSING_METHOD_KIND,
 216   JV_SIGNATURE_KIND,
 217   JV_ANNOTATIONS_KIND,
 218   JV_PARAMETER_ANNOTATIONS_KIND,
 219   JV_ANNOTATION_DEFAULT_KIND
 220 } jv_attr_kind;
 221
 222 #define JV_PRIMITIVE_VTABLE ((_Jv_VTable *) -1)
 223
 224 #define JV_CLASS(Obj) ((jclass) (*(_Jv_VTable **) Obj)->clas)
 225
 226 // Forward declarations for friends of java::lang::Class
 227
 228 // Friend functions implemented in natClass.cc.
 229 _Jv_Method *_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
 230                                 _Jv_Utf8Const *signature);
 231 jboolean _Jv_IsAssignableFrom (jclass, jclass);
 232 jboolean _Jv_IsAssignableFromSlow (jclass, jclass);
 233 jboolean _Jv_InterfaceAssignableFrom (jclass, jclass);
 234
 235 _Jv_Method* _Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
 236                                       _Jv_Utf8Const*, jclass * = NULL);
 237 java::lang::reflect::Method *_Jv_GetReflectedMethod (jclass klass,
 238                                                     _Jv_Utf8Const *name,
 239                                                     _Jv_Utf8Const *signature);
 240 jfieldID JvGetFirstInstanceField (jclass);
 241 jint JvNumInstanceFields (jclass);
 242 jfieldID JvGetFirstStaticField (jclass);
 243 jint JvNumStaticFields (jclass);
 244
 245 jobject _Jv_AllocObject (jclass);
 246 void *_Jv_AllocObj (jint, jclass);
 247 void *_Jv_AllocPtrFreeObj (jint, jclass);
 248 void *_Jv_AllocArray (jint, jclass);
 249
 250 bool _Jv_getInterfaceMethod(jclass, jclass&, int&,
 251                             const _Jv_Utf8Const*,
 252                             const _Jv_Utf8Const*);
 253
 254 jobject JNICALL _Jv_JNI_ToReflectedField (_Jv_JNIEnv *, jclass, jfieldID,
 255                                           jboolean);
 256 jobject JNICALL _Jv_JNI_ToReflectedMethod (_Jv_JNIEnv *, jclass, jmethodID,
 257                                            jboolean);
 258 jfieldID _Jv_FromReflectedField (java::lang::reflect::Field *);
 259
 260 jmethodID _Jv_FromReflectedMethod (java::lang::reflect::Method *);
 261 jmethodID _Jv_FromReflectedConstructor (java::lang::reflect::Constructor *);
 262 jint JvNumMethods (jclass);
 263 jmethodID JvGetFirstMethod (jclass);
 264 _Jv_Utf8Const *_Jv_GetClassNameUtf8 (jclass);
 265
 266 #ifdef INTERPRETER
 267 // Finds a desired interpreter method in the given class or NULL if not found
 268 class _Jv_MethodBase;
 269 _Jv_MethodBase *_Jv_FindInterpreterMethod (jclass, jmethodID);
 270 jstring _Jv_GetInterpClassSourceFile (jclass);
 271 #endif
 272
 273 jbyte _Jv_GetClassState (jclass);
 274
 275 void _Jv_RegisterClassHookDefault (jclass klass);
 276 void _Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 277 void _Jv_UnregisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 278 void _Jv_UnregisterClass (jclass);
 279 jclass _Jv_FindClassNoException (_Jv_Utf8Const *name,
 280                       java::lang::ClassLoader *loader);
 281 jclass _Jv_FindClass (_Jv_Utf8Const *name,
 282                       java::lang::ClassLoader *loader);
 283 jclass _Jv_FindClassInCache (_Jv_Utf8Const *name);
 284 jclass _Jv_PopClass (void);
 285 void _Jv_PushClass (jclass k);
 286 void _Jv_NewArrayClass (jclass element,
 287                         java::lang::ClassLoader *loader,
 288                         _Jv_VTable *array_vtable = 0);
 289 jclass _Jv_NewClass (_Jv_Utf8Const *name, jclass superclass,
 290                      java::lang::ClassLoader *loader);
 291 void _Jv_InitNewClassFields (jclass klass);
 292
 293 // Friend functions and classes in prims.cc
 294 void _Jv_InitPrimClass (jclass, const char *, char, int);
 295 jstring _Jv_GetMethodString (jclass, _Jv_Method *, jclass = NULL);
 296
 297 jboolean _Jv_CheckAccess (jclass self_klass, jclass other_klass,
 298                           jint flags);
 299 jclass _Jv_GetArrayClass (jclass klass, java::lang::ClassLoader *loader);
 300
 301 jboolean _Jv_IsInterpretedClass (jclass);
 302 jboolean _Jv_IsBinaryCompatibilityABI (jclass);
 303
 304 jboolean _Jv_IsPhantomClass (jclass);
 305
 306 void _Jv_CopyClassesToSystemLoader (gnu::gcj::runtime::SystemClassLoader *);
 307
 308 #ifdef INTERPRETER
 309 void _Jv_InitField (jobject, jclass, int);
 310 #endif
 311
 312 class _Jv_StackTrace;
 313 class _Jv_BytecodeVerifier;
 314
 315 void _Jv_sharedlib_register_hook (jclass klass);
 316
 317 /* Find the class that defines the given method. Returns NULL
 318    if it cannot be found. Searches both interpreted and native
 319    classes. */
 320 jclass _Jv_GetMethodDeclaringClass (jmethodID method);
 321
 322 class java::lang::Class : public java::lang::Object
 323 {
 324 public:
 325   static jclass forName (jstring className, jboolean initialize,
 326                          java::lang::ClassLoader *loader);
 327   static jclass forName (jstring className);
 328   JArray<jclass> *getClasses (void);
 329
 330   java::lang::ClassLoader *getClassLoader (void);
 331 private:
 332   java::lang::ClassLoader *getClassLoader (jclass caller);
 333 public:
 334   // This is an internal method that circumvents the usual security
 335   // checks when getting the class loader.
 336   java::lang::ClassLoader *getClassLoaderInternal (void)
 337   {
 338     return loader;
 339   }
 340
 341   java::lang::reflect::Constructor *getConstructor (JArray<jclass> *);
 342   JArray<java::lang::reflect::Constructor *> *getConstructors (void);
 343   java::lang::reflect::Constructor *getDeclaredConstructor (JArray<jclass> *);
 344   JArray<java::lang::reflect::Constructor *> *getDeclaredConstructors (jboolean);
 345   java::lang::reflect::Field *getDeclaredField (jstring);
 346   JArray<java::lang::reflect::Field *> *getDeclaredFields ();
 347   JArray<java::lang::reflect::Field *> *getDeclaredFields (jboolean);
 348   java::lang::reflect::Method *getDeclaredMethod (jstring, JArray<jclass> *);
 349   JArray<java::lang::reflect::Method *> *getDeclaredMethods (void);
 350
 351   JArray<jclass> *getDeclaredClasses (void);
 352   JArray<jclass> *getDeclaredClasses (jboolean);
 353   jclass getDeclaringClass (void);
 354
 355   java::lang::reflect::Field *getField (jstring);
 356 private:
 357   JArray<java::lang::reflect::Field *> internalGetFields ();
 358   java::lang::reflect::Field *getField (jstring, jint);
 359   jint _getMethods (JArray<java::lang::reflect::Method *> *result,
 360                     jint offset);
 361   java::lang::reflect::Field *getPrivateField (jstring);
 362   java::lang::reflect::Method *getPrivateMethod (jstring, JArray<jclass> *);
 363   java::security::ProtectionDomain *getProtectionDomain0 ();
 364
 365   java::lang::reflect::Method *_getMethod (jstring, JArray<jclass> *);
 366   java::lang::reflect::Method *_getDeclaredMethod (jstring, JArray<jclass> *);
 367
 368   jstring getReflectionSignature (jint /*jv_attr_type*/ type,
 369                                   jint obj_index);
 370   jstring getReflectionSignature (::java::lang::reflect::Method *);
 371   jstring getReflectionSignature (::java::lang::reflect::Constructor *);
 372   jstring getReflectionSignature (::java::lang::reflect::Field *);
 373
 374   jstring getClassSignature();
 375   jobject getMethodDefaultValue (::java::lang::reflect::Method *);
 376
 377 public:
 378   JArray<java::lang::reflect::Field *> *getFields (void);
 379
 380   JArray<jclass> *getInterfaces (void);
 381
 382   void getSignature (java::lang::StringBuffer *buffer);
 383   static jstring getSignature (JArray<jclass> *, jboolean is_constructor);
 384   JArray<java::lang::reflect::Method *> *getMethods (void);
 385
 386   inline jint getModifiers (void)
 387   {
 388     return accflags & java::lang::reflect::Modifier::ALL_FLAGS;
 389   }
 390
 391   jstring getName (void);
 392
 393   java::net::URL        *getResource (jstring resourceName);
 394   java::io::InputStream *getResourceAsStream (jstring resourceName);
 395   JArray<jobject> *getSigners (void);
 396   void setSigners(JArray<jobject> *);
 397
 398   inline jclass getSuperclass (void)
 399   {
 400     return superclass;
 401   }
 402
 403   inline jclass getInterface (jint n)
 404   {
 405     return interfaces[n];
 406   }
 407
 408   inline jboolean isArray (void)
 409     {
 410       return name->first() == '[';
 411     }
 412
 413   inline jclass getComponentType (void)
 414     {
 415       return isArray () ? element_type : 0;
 416     }
 417
 418   jboolean isAssignableFrom (jclass cls);
 419   jboolean isInstance (jobject obj);
 420
 421   inline jboolean isInterface (void)
 422   {
 423     return (accflags & java::lang::reflect::Modifier::INTERFACE) != 0;
 424   }
 425
 426   inline jboolean isPrimitive (void)
 427     {
 428       return vtable == JV_PRIMITIVE_VTABLE;
 429     }
 430
 431   jobject newInstance (void);
 432   java::security::ProtectionDomain *getProtectionDomain (void);
 433   java::lang::Package *getPackage (void);
 434   jstring toString (void);
 435   jboolean desiredAssertionStatus (void);
 436
 437   JArray<java::lang::reflect::TypeVariable *> *getTypeParameters (void);
 438
 439   jint getEnclosingMethodData(void);
 440   java::lang::Class *getEnclosingClass (void);
 441   java::lang::reflect::Constructor *getEnclosingConstructor (void);
 442   java::lang::reflect::Method *getEnclosingMethod (void);
 443   jobjectArray getDeclaredAnnotations(jint, jint, jint);
 444   jobjectArray getDeclaredAnnotations(::java::lang::reflect::Method *,
 445                                       jboolean);
 446   jobjectArray getDeclaredAnnotations(::java::lang::reflect::Constructor *,
 447                                       jboolean);
 448   jobjectArray getDeclaredAnnotations(::java::lang::reflect::Field *);
 449   JArray< ::java::lang::annotation::Annotation *> *getDeclaredAnnotationsInternal();
 450
 451   jboolean isEnum (void)
 452   {
 453     return (accflags & 0x4000) != 0;
 454   }
 455   jboolean isSynthetic (void)
 456   {
 457     return (accflags & 0x1000) != 0;
 458   }
 459   jboolean isAnnotation (void)
 460   {
 461     return (accflags & 0x2000) != 0;
 462   }
 463
 464   jboolean isAnonymousClass();
 465   jboolean isLocalClass();
 466   jboolean isMemberClass();
 467
 468   // FIXME: this probably shouldn't be public.
 469   jint size (void)
 470   {
 471     return size_in_bytes;
 472   }
 473
 474   // The index of the first method we declare ourself (as opposed to
 475   // inheriting).
 476   inline jint firstMethodIndex (void)
 477   {
 478     return vtable_method_count - method_count;
 479   }
 480
 481   // finalization
 482   void finalize ();
 483
 484   // This constructor is used to create Class object for the primitive
 485   // types. See prims.cc.
 486   Class ();
 487
 488   // Given the BC ABI version, return the size of an Class initializer.
 489   static jlong initializerSize (jlong ABI)
 490   {
 491     unsigned long version = ABI & 0xfffff;
 492     int abi_rev = version % 100;
 493
 494     // The reflection_data field was added by abi_rev 1.
 495     if (abi_rev == 0)
 496       return ((char*)(&::java::lang::Class::class$.reflection_data)
 497               - (char*)&::java::lang::Class::class$);
 498
 499     return sizeof (::java::lang::Class);
 500   }
 501
 502   static java::lang::Class class$;
 503
 504 private:
 505
 506   void memberAccessCheck (jint flags);
 507
 508   void initializeClass (void);
 509
 510   static jstring getPackagePortion (jstring);
 511
 512   void set_state (jint nstate)
 513   {
 514     state = nstate;
 515     notifyAll ();
 516   }
 517
 518   jint findInnerClassAttribute();
 519   jint findDeclaredClasses(JArray<jclass> *, jboolean, jint);
 520
 521   // Friend functions implemented in natClass.cc.
 522   friend _Jv_Method *::_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
 523                                            _Jv_Utf8Const *signature);
 524   friend jboolean (::_Jv_IsAssignableFrom) (jclass, jclass);
 525   friend jboolean (::_Jv_IsAssignableFromSlow) (jclass, jclass);
 526   friend jboolean (::_Jv_InterfaceAssignableFrom) (jclass, jclass);
 527   friend void *::_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
 528                                                int method_idx);
 529
 530   friend void ::_Jv_InitClass (jclass klass);
 531   friend java::lang::Class* ::_Jv_NewClassFromInitializer (const char *class_initializer);
 532   friend void _Jv_RegisterNewClasses (void **classes);
 533
 534   friend _Jv_Method* ::_Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
 535                                                  _Jv_Utf8Const*, jclass *);
 536   friend java::lang::reflect::Method* ::_Jv_GetReflectedMethod (jclass klass,
 537                                                     _Jv_Utf8Const *name,
 538                                                     _Jv_Utf8Const *signature);
 539   friend jfieldID (::JvGetFirstInstanceField) (jclass);
 540   friend jint (::JvNumInstanceFields) (jclass);
 541   friend jfieldID (::JvGetFirstStaticField) (jclass);
 542   friend jint (::JvNumStaticFields) (jclass);
 543
 544   friend jobject (::_Jv_AllocObject) (jclass);
 545   friend void *::_Jv_AllocObj (jint, jclass);
 546   friend void *::_Jv_AllocPtrFreeObj (jint, jclass);
 547   friend void *::_Jv_AllocArray (jint, jclass);
 548
 549   friend jobject JNICALL (::_Jv_JNI_ToReflectedField) (_Jv_JNIEnv *, jclass, jfieldID,
 550                                                jboolean);
 551   friend jobject (::_Jv_JNI_ToReflectedMethod) (_Jv_JNIEnv *, jclass, jmethodID,
 552                                                 jboolean);
 553   friend jfieldID (::_Jv_FromReflectedField) (java::lang::reflect::Field *);
 554
 555   friend jmethodID (::_Jv_FromReflectedMethod) (java::lang::reflect::Method *);
 556   friend jmethodID (::_Jv_FromReflectedConstructor) (java::lang::reflect::Constructor *);
 557   friend jint (::JvNumMethods) (jclass);
 558   friend jmethodID (::JvGetFirstMethod) (jclass);
 559   friend _Jv_Utf8Const *::_Jv_GetClassNameUtf8 (jclass);
 560 #ifdef INTERPRETER
 561   friend _Jv_MethodBase *(::_Jv_FindInterpreterMethod) (jclass klass,
 562                                                         jmethodID desired_method);
 563   friend jstring ::_Jv_GetInterpClassSourceFile (jclass);
 564 #endif
 565   friend jbyte (::_Jv_GetClassState) (jclass klass);
 566
 567   // Friends classes and functions to implement the ClassLoader
 568   friend class java::lang::ClassLoader;
 569   friend class java::lang::VMClassLoader;
 570
 571   friend class java::io::ObjectOutputStream;
 572   friend class java::io::ObjectInputStream;
 573   friend class java::io::ObjectStreamClass;
 574
 575   friend void ::_Jv_RegisterClasses (const jclass *classes);
 576   friend void ::_Jv_RegisterClasses_Counted (const jclass *classes,
 577                                              size_t count);
 578   friend void ::_Jv_RegisterClassHookDefault (jclass klass);
 579   friend void ::_Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 580   friend void ::_Jv_UnregisterInitiatingLoader (jclass,java::lang::ClassLoader*);
 581   friend void ::_Jv_UnregisterClass (jclass);
 582   friend jclass (::_Jv_FindClassNoException) (_Jv_Utf8Const *name,
 583                                    java::lang::ClassLoader *loader);
 584   friend jclass (::_Jv_FindClass) (_Jv_Utf8Const *name,
 585                                    java::lang::ClassLoader *loader);
 586   friend jclass (::_Jv_FindClassInCache) (_Jv_Utf8Const *name);
 587   friend jclass (::_Jv_PopClass) (void);
 588   friend void ::_Jv_PushClass (jclass k);
 589   friend void ::_Jv_NewArrayClass (jclass element,
 590                                    java::lang::ClassLoader *loader,
 591                                    _Jv_VTable *array_vtable);
 592   friend jclass (::_Jv_NewClass) (_Jv_Utf8Const *name, jclass superclass,
 593                                   java::lang::ClassLoader *loader);
 594   friend void ::_Jv_InitNewClassFields (jclass klass);
 595
 596   // in prims.cc
 597   friend void ::_Jv_InitPrimClass (jclass, const char *, char, int);
 598
 599   friend jstring (::_Jv_GetMethodString) (jclass, _Jv_Method *, jclass);
 600
 601   friend jboolean (::_Jv_CheckAccess) (jclass self_klass, jclass other_klass,
 602                                    jint flags);
 603
 604   friend bool (::_Jv_getInterfaceMethod) (jclass, jclass&, int&,
 605                                           const _Jv_Utf8Const*,
 606                                           const _Jv_Utf8Const*);
 607
 608   friend jclass (::_Jv_GetArrayClass) (jclass klass,
 609                                        java::lang::ClassLoader *loader);
 610
 611   friend jboolean (::_Jv_IsInterpretedClass) (jclass);
 612   friend jboolean (::_Jv_IsBinaryCompatibilityABI) (jclass);
 613
 614   friend jboolean (::_Jv_IsPhantomClass) (jclass);
 615
 616 #ifdef INTERPRETER
 617   friend void ::_Jv_InitField (jobject, jclass, int);
 618
 619   friend class ::_Jv_ClassReader;
 620   friend class ::_Jv_InterpClass;
 621   friend class ::_Jv_InterpMethod;
 622   friend class ::_Jv_InterpreterEngine;
 623 #endif
 624   friend class ::_Jv_StackTrace;
 625
 626 #ifdef JV_MARKOBJ_DECL
 627   friend JV_MARKOBJ_DECL;
 628 #endif
 629
 630   friend class ::_Jv_BytecodeVerifier;
 631   friend class java::io::VMObjectStreamClass;
 632
 633   friend class ::_Jv_Linker;
 634   friend class ::_Jv_ExecutionEngine;
 635   friend class ::_Jv_CompiledEngine;
 636   friend class ::_Jv_IndirectCompiledEngine;
 637   friend class ::_Jv_ClosureList;
 638
 639   friend void ::_Jv_sharedlib_register_hook (jclass klass);
 640
 641   friend void *::_Jv_ResolvePoolEntry (jclass this_class, jint index);
 642
 643   friend void ::_Jv_CopyClassesToSystemLoader (gnu::gcj::runtime::SystemClassLoader *);
 644
 645   friend class java::lang::reflect::Field;
 646   friend class java::lang::reflect::Method;
 647   friend class java::lang::reflect::Constructor;
 648   friend class java::lang::reflect::VMProxy;
 649
 650   // Chain for class pool.  This also doubles as the ABI version
 651   // number.  It is only used for this purpose at class registration
 652   // time, and only for precompiled classes.
 653   jclass next_or_version;
 654   // Name of class.
 655   _Jv_Utf8Const *name;
 656   // Access flags for class.
 657   _Jv_ushort accflags;
 658   // The superclass, or null for Object.
 659   jclass superclass;
 660   // Class constants.
 661   _Jv_Constants constants;
 662   // Methods.  If this is an array class, then this field holds a
 663   // pointer to the element type.
 664   union
 665   {
 666     _Jv_Method *methods;
 667     jclass element_type;
 668   };
 669   // Number of methods.  If this class is primitive, this holds the
 670   // character used to represent this type in a signature.
 671   jshort method_count;
 672   // Number of methods in the vtable.
 673   jshort vtable_method_count;
 674   // The fields.
 675   _Jv_Field *fields;
 676   // Size of instance fields, in bytes.
 677   jint size_in_bytes;
 678   // Total number of fields (instance and static).
 679   jshort field_count;
 680   // Number of static fields.
 681   jshort static_field_count;
 682   // The vtbl for all objects of this class.
 683   _Jv_VTable *vtable;
 684   // Virtual method offset table.
 685   _Jv_OffsetTable *otable;
 686   // Offset table symbols.
 687   _Jv_MethodSymbol *otable_syms;
 688   // Address table
 689   _Jv_AddressTable *atable;
 690   _Jv_MethodSymbol *atable_syms;
 691   // Interface table
 692   _Jv_AddressTable *itable;
 693   _Jv_MethodSymbol *itable_syms;
 694   _Jv_CatchClass *catch_classes;
 695   // Interfaces implemented by this class.
 696   jclass *interfaces;
 697   // The class loader for this class.
 698   java::lang::ClassLoader *loader;
 699   // Number of interfaces.
 700   jshort interface_count;
 701   // State of this class.
 702   jbyte state;
 703   // The thread which has locked this class.  Used during class
 704   // initialization.
 705   java::lang::Thread *thread;
 706   // How many levels of "extends" this class is removed from Object.
 707   jshort depth;
 708   // Vector of this class's superclasses, ordered by decreasing depth.
 709   jclass *ancestors;
 710   // In a regular class, this field points to the Class Interface Dispatch
 711   // Table. In an interface, it points to the ioffsets table.
 712   union
 713   {
 714     _Jv_IDispatchTable *idt;
 715     jshort *ioffsets;
 716   };
 717   // Pointer to the class that represents an array of this class.
 718   jclass arrayclass;
 719   // Security Domain to which this class belongs (or null).
 720   java::security::ProtectionDomain *protectionDomain;
 721   // Pointer to the type assertion table for this class.
 722   _Jv_TypeAssertion *assertion_table;
 723   // Signers of this class (or null).
 724   JArray<jobject> *hack_signers;
 725   // Used by Jv_PopClass and _Jv_PushClass to communicate with StackTrace.
 726   jclass chain;
 727   // Additional data, specific to the generator (JIT, native,
 728   // interpreter) of this class.
 729   void *aux_info;
 730   // Execution engine.
 731   _Jv_ExecutionEngine *engine;
 732   // Reflection data.
 733   unsigned char *reflection_data;
 734 };
 735
 736 // Inline functions that are friends of java::lang::Class
 737
 738 inline void _Jv_InitClass (jclass klass)
 739 {
 740   if (__builtin_expect (klass->state == JV_STATE_DONE, true))
 741     return;
 742   klass->initializeClass ();
 743 }
 744
 745 // Return array class corresponding to element type KLASS, creating it if
 746 // necessary.
 747 inline jclass
 748 _Jv_GetArrayClass (jclass klass, java::lang::ClassLoader *loader)
 749 {
 750   extern void _Jv_NewArrayClass (jclass element,
 751                                  java::lang::ClassLoader *loader,
 752                                  _Jv_VTable *array_vtable = 0);
 753   if (__builtin_expect (!klass->arrayclass, false))
 754     _Jv_NewArrayClass (klass, loader);
 755   return klass->arrayclass;
 756 }
 757
 758 #endif /* __JAVA_LANG_CLASS_H__ */