1bf8972740
Fix for PR java.lang/258: * prims.cc (_Jv_PrimClass): Set state of primitive class to JV_STATE_DONE, to prevent accidental initialization. * java/lang/natClass.cc (_Jv_IsAssignableFrom): Call _Jv_InterfaceAssignableFrom if target is an interface and source is an interface or an abstract class. Remove redundant initializeClass calls. Remove duplicate if_idt test. (_Jv_InterfaceAssignableFrom): New function. * java/lang/Class.h (_Jv_InterfaceAssignableFrom): Prototype. From-SVN: r34563
340 lines
10 KiB
C++
340 lines
10 KiB
C++
// Class.h - Header file for java.lang.Class. -*- c++ -*-
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/* Copyright (C) 1998, 1999, 2000 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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// Written primary using compiler source and Class.java as guides.
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#ifndef __JAVA_LANG_CLASS_H__
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#define __JAVA_LANG_CLASS_H__
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#pragma interface
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#include <java/lang/Object.h>
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#include <java/lang/String.h>
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#include <java/net/URL.h>
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// We declare these here to avoid including gcj/cni.h.
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extern "C" void _Jv_InitClass (jclass klass);
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extern "C" void _Jv_RegisterClasses (jclass *classes);
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// This must be predefined with "C" linkage.
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extern "C" void *_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
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int meth_idx);
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// These are the possible values for the `state' field of the class
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// structure. Note that ordering is important here. Whenever the
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// state changes, one should notify all waiters of this class.
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enum
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{
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JV_STATE_NOTHING = 0, // Set by compiler.
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JV_STATE_PRELOADING = 1, // Can do _Jv_FindClass.
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JV_STATE_LOADING = 3, // Has super installed.
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JV_STATE_LOADED = 5, // Is complete.
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JV_STATE_COMPILED = 6, // This was a compiled class.
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JV_STATE_PREPARED = 7, // Layout & static init done.
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JV_STATE_LINKED = 9, // Strings interned.
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JV_STATE_IN_PROGRESS = 10, // <Clinit> running.
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JV_STATE_DONE = 12, //
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JV_STATE_ERROR = 14 // must be last.
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};
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struct _Jv_Field;
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struct _Jv_VTable;
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union _Jv_word;
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struct _Jv_Constants
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{
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jint size;
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jbyte *tags;
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_Jv_word *data;
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};
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struct _Jv_Method
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{
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_Jv_Utf8Const *name;
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_Jv_Utf8Const *signature;
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_Jv_ushort accflags;
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void *ncode;
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_Jv_Method *getNextMethod ()
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{ return this + 1; }
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};
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// Interface Dispatch Tables
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union _Jv_IDispatchTable
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{
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struct
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{
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// Index into interface's ioffsets.
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jshort iindex;
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jshort itable_length;
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// Class Interface dispatch table.
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void **itable;
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} cls;
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struct
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{
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// Offsets into implementation class itables.
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jshort *ioffsets;
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} iface;
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};
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// Used by _Jv_GetInterfaces ()
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struct _Jv_ifaces
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{
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jclass *list;
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jshort len;
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jshort count;
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};
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#define JV_PRIMITIVE_VTABLE ((_Jv_VTable *) -1)
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#define JV_CLASS(Obj) ((jclass) (*(_Jv_VTable **) Obj)->clas)
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class java::lang::Class : public java::lang::Object
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{
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public:
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static jclass forName (jstring className);
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JArray<jclass> *getClasses (void);
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java::lang::ClassLoader *getClassLoader (void)
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{
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return loader;
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}
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java::lang::reflect::Constructor *getConstructor (JArray<jclass> *);
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JArray<java::lang::reflect::Constructor *> *getConstructors (void);
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java::lang::reflect::Constructor *getDeclaredConstructor (JArray<jclass> *);
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JArray<java::lang::reflect::Constructor *> *getDeclaredConstructors (void);
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java::lang::reflect::Field *getDeclaredField (jstring);
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JArray<java::lang::reflect::Field *> *getDeclaredFields (void);
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java::lang::reflect::Method *getDeclaredMethod (jstring, JArray<jclass> *);
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JArray<java::lang::reflect::Method *> *getDeclaredMethods (void);
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JArray<jclass> *getDeclaredClasses (void);
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jclass getDeclaringClass (void);
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java::lang::reflect::Field *getField (jstring);
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private:
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jint _getFields (JArray<java::lang::reflect::Field *> *result, jint offset);
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JArray<java::lang::reflect::Constructor *> *_getConstructors (jboolean);
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java::lang::reflect::Field *getField (jstring, jint);
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jint _getMethods (JArray<java::lang::reflect::Method *> *result,
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jint offset);
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java::lang::reflect::Field *getPrivateField (jstring);
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java::lang::reflect::Method *getPrivateMethod (jstring, JArray<jclass> *);
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public:
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JArray<java::lang::reflect::Field *> *getFields (void);
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JArray<jclass> *getInterfaces (void);
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void getSignature (java::lang::StringBuffer *buffer);
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static jstring getSignature (JArray<jclass> *, jboolean is_constructor);
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java::lang::reflect::Method *getMethod (jstring, JArray<jclass> *);
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JArray<java::lang::reflect::Method *> *getMethods (void);
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inline jint getModifiers (void)
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{
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return accflags;
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}
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jstring getName (void);
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java::net::URL *getResource (jstring resourceName);
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java::io::InputStream *getResourceAsStream (jstring resourceName);
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JArray<jobject> *getSigners (void);
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inline jclass getSuperclass (void)
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{
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return superclass;
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}
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inline jboolean isArray (void)
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{
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return name->data[0] == '[';
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}
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inline jclass getComponentType (void)
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{
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return isArray () ? (* (jclass *) &methods) : 0;
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}
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jboolean isAssignableFrom (jclass cls);
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jboolean isInstance (jobject obj);
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jboolean isInterface (void);
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inline jboolean isPrimitive (void)
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{
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return vtable == JV_PRIMITIVE_VTABLE;
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}
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jobject newInstance (void);
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jstring toString (void);
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// FIXME: this probably shouldn't be public.
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jint size (void)
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{
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return size_in_bytes;
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}
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// finalization
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void finalize ();
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private:
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void checkMemberAccess (jint flags);
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void initializeClass (void);
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// Friend functions implemented in natClass.cc.
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friend _Jv_Method *_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
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_Jv_Utf8Const *signature);
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friend jboolean _Jv_IsAssignableFrom(jclass, jclass);
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friend jboolean _Jv_InterfaceAssignableFrom (jclass, jclass);
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friend void *_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
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int method_idx);
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inline friend void
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_Jv_InitClass (jclass klass)
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{
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if (klass->state == JV_STATE_DONE)
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return;
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klass->initializeClass ();
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}
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friend _Jv_Method* _Jv_LookupDeclaredMethod (jclass, _Jv_Utf8Const *,
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_Jv_Utf8Const*);
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friend jfieldID JvGetFirstInstanceField (jclass);
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friend jint JvNumInstanceFields (jclass);
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friend jfieldID JvGetFirstStaticField (jclass);
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friend jint JvNumStaticFields (jclass);
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friend jobject _Jv_AllocObject (jclass, jint);
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friend jobjectArray _Jv_NewObjectArray (jsize, jclass, jobject);
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friend jobject _Jv_NewPrimArray (jclass, jint);
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friend jobject _Jv_JNI_ToReflectedField (_Jv_JNIEnv *, jclass, jfieldID,
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jboolean);
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friend jobject _Jv_JNI_ToReflectedMethod (_Jv_JNIEnv *, jclass, jmethodID,
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jboolean);
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friend jfieldID _Jv_FromReflectedField (java::lang::reflect::Field *);
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friend jmethodID _Jv_FromReflectedMethod (java::lang::reflect::Method *);
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friend jmethodID _Jv_FromReflectedConstructor (java::lang::reflect::Constructor *);
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friend jint JvNumMethods (jclass);
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friend jmethodID JvGetFirstMethod (jclass);
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friend class _Jv_PrimClass;
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// Friends classes and functions to implement the ClassLoader
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friend class java::lang::ClassLoader;
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friend class java::io::ObjectOutputStream;
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friend class java::io::ObjectInputStream;
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friend class java::io::ObjectStreamClass;
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friend void _Jv_WaitForState (jclass, int);
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friend void _Jv_RegisterClasses (jclass *classes);
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friend void _Jv_RegisterInitiatingLoader (jclass,java::lang::ClassLoader*);
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friend void _Jv_UnregisterClass (jclass);
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friend jclass _Jv_FindClass (_Jv_Utf8Const *name,
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java::lang::ClassLoader *loader);
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friend jclass _Jv_FindClassInCache (_Jv_Utf8Const *name,
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java::lang::ClassLoader *loader);
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friend jclass _Jv_FindArrayClass (jclass element,
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java::lang::ClassLoader *loader,
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_Jv_VTable *array_vtable = 0);
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friend jclass _Jv_NewClass (_Jv_Utf8Const *name, jclass superclass,
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java::lang::ClassLoader *loader);
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friend void _Jv_PrepareCompiledClass (jclass);
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friend void _Jv_PrepareConstantTimeTables (jclass);
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friend jshort _Jv_GetInterfaces (jclass, _Jv_ifaces *);
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friend void _Jv_GenerateITable (jclass, _Jv_ifaces *, jshort *);
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friend jstring _Jv_GetMethodString(jclass, _Jv_Utf8Const *);
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friend jshort _Jv_AppendPartialITable (jclass, jclass, void **, jshort);
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friend jshort _Jv_FindIIndex (jclass *, jshort *, jshort);
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#ifdef INTERPRETER
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friend jboolean _Jv_IsInterpretedClass (jclass);
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friend void _Jv_InitField (jobject, jclass, _Jv_Field*);
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friend int _Jv_DetermineVTableIndex (jclass, _Jv_Utf8Const *,
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_Jv_Utf8Const*);
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friend void _Jv_InitField (jobject, jclass, int);
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friend _Jv_word _Jv_ResolvePoolEntry (jclass, int);
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friend _Jv_Method *_Jv_SearchMethodInClass (jclass cls, jclass klass,
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_Jv_Utf8Const *method_name,
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_Jv_Utf8Const *method_signature);
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friend void _Jv_PrepareClass (jclass);
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friend class _Jv_ClassReader;
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friend class _Jv_InterpClass;
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friend class _Jv_InterpMethod;
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friend class _Jv_InterpMethodInvocation;
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#endif
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#ifdef JV_MARKOBJ_DECL
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friend JV_MARKOBJ_DECL;
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#endif
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// Chain for class pool.
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jclass next;
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// Name of class.
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_Jv_Utf8Const *name;
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// Access flags for class.
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_Jv_ushort accflags;
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// The superclass, or null for Object.
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jclass superclass;
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// Class constants.
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_Jv_Constants constants;
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// Methods. If this is an array class, then this field holds a
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// pointer to the element type. If this is a primitive class, this
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// is used to cache a pointer to the appropriate array type.
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_Jv_Method *methods;
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// Number of methods. If this class is primitive, this holds the
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// character used to represent this type in a signature.
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jshort method_count;
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// Number of methods in the vtable.
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jshort vtable_method_count;
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// The fields.
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_Jv_Field *fields;
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// Size of instance fields, in bytes.
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jint size_in_bytes;
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// Total number of fields (instance and static).
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jshort field_count;
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// Number of static fields.
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jshort static_field_count;
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// The vtbl for all objects of this class.
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_Jv_VTable *vtable;
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// Interfaces implemented by this class.
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jclass *interfaces;
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// The class loader for this class.
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java::lang::ClassLoader *loader;
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// Number of interfaces.
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jshort interface_count;
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// State of this class.
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jbyte state;
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// The thread which has locked this class. Used during class
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// initialization.
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java::lang::Thread *thread;
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// How many levels of "extends" this class is removed from Object.
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jshort depth;
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// Vector of this class's superclasses, ordered by decreasing depth.
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jclass *ancestors;
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// Interface Dispatch Table.
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_Jv_IDispatchTable *idt;
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};
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#endif /* __JAVA_LANG_CLASS_H__ */
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