799 lines
21 KiB
C++
799 lines
21 KiB
C++
// natClass.cc - Implementation of java.lang.Class native methods.
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/* Copyright (C) 1998, 1999, 2000 Cygnus Solutions
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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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#include <config.h>
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#include <stdlib.h>
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#include <string.h>
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#pragma implementation "Class.h"
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java/lang/Class.h>
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#include <java/lang/ClassLoader.h>
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#include <java/lang/String.h>
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#include <java/lang/reflect/Modifier.h>
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#include <java/lang/reflect/Member.h>
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#include <java/lang/reflect/Method.h>
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#include <java/lang/reflect/Field.h>
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#include <java/lang/reflect/Constructor.h>
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#include <java/lang/AbstractMethodError.h>
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#include <java/lang/ClassNotFoundException.h>
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#include <java/lang/IllegalAccessException.h>
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#include <java/lang/IllegalAccessError.h>
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#include <java/lang/IncompatibleClassChangeError.h>
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#include <java/lang/InstantiationException.h>
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#include <java/lang/NoClassDefFoundError.h>
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#include <java/lang/NoSuchFieldException.h>
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#include <java/lang/NoSuchMethodException.h>
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#include <java/lang/Thread.h>
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#include <java/lang/NullPointerException.h>
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#include <java/lang/System.h>
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#include <java/lang/SecurityManager.h>
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#include <java/lang/StringBuffer.h>
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#include <java-cpool.h>
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#define CloneableClass _CL_Q34java4lang9Cloneable
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extern java::lang::Class CloneableClass;
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#define ObjectClass _CL_Q34java4lang6Object
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extern java::lang::Class ObjectClass;
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#define ErrorClass _CL_Q34java4lang5Error
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extern java::lang::Class ErrorClass;
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#define ClassClass _CL_Q34java4lang5Class
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extern java::lang::Class ClassClass;
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#define MethodClass _CL_Q44java4lang7reflect6Method
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extern java::lang::Class MethodClass;
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#define FieldClass _CL_Q44java4lang7reflect5Field
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extern java::lang::Class FieldClass;
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#define ConstructorClass _CL_Q44java4lang7reflect11Constructor
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extern java::lang::Class ConstructorClass;
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// Some constants we use to look up the class initializer.
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static _Jv_Utf8Const *void_signature = _Jv_makeUtf8Const ("()V", 3);
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static _Jv_Utf8Const *clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
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static _Jv_Utf8Const *init_name = _Jv_makeUtf8Const ("<init>", 6);
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jclass
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java::lang::Class::forName (jstring className)
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{
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if (! className)
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JvThrow (new java::lang::NullPointerException);
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#if 0
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// FIXME: should check syntax of CLASSNAME and throw
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// IllegalArgumentException on failure.
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// FIXME: should use class loader from calling method.
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jclass klass = _Jv_FindClass (className, NULL);
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#else
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jsize length = _Jv_GetStringUTFLength (className);
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char buffer[length];
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_Jv_GetStringUTFRegion (className, 0, length, buffer);
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// FIXME: should check syntax of CLASSNAME and throw
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// IllegalArgumentException on failure.
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_Jv_Utf8Const *name = _Jv_makeUtf8Const (buffer, length);
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// FIXME: should use class loader from calling method.
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jclass klass = (buffer[0] == '['
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? _Jv_FindClassFromSignature (name->data, NULL)
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: _Jv_FindClass (name, NULL));
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#endif
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if (! klass)
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JvThrow (new java::lang::ClassNotFoundException (className));
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return klass;
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}
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java::lang::reflect::Constructor *
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java::lang::Class::getConstructor (JArray<jclass> *param_types)
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{
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jstring partial_sig = getSignature (param_types);
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jint hash = partial_sig->hashCode ();
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int i = isPrimitive () ? 0 : method_count;
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while (--i >= 0)
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{
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// FIXME: access checks.
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if (_Jv_equalUtf8Consts (methods[i].name, init_name)
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&& _Jv_equal (methods[i].signature, partial_sig, hash))
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{
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// Found it. For getConstructor, the constructor must be
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// public.
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using namespace java::lang::reflect;
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if (Modifier::isPublic(methods[i].accflags))
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break;
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Constructor *cons = new Constructor ();
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cons->offset = (char *) (&methods[i]) - (char *) methods;
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cons->declaringClass = this;
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return cons;
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}
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}
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JvThrow (new java::lang::NoSuchMethodException);
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}
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JArray<java::lang::reflect::Constructor *> *
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java::lang::Class::_getConstructors (jboolean declared)
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{
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// FIXME: this method needs access checks.
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int numConstructors = 0;
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int max = isPrimitive () ? 0 : method_count;
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int i;
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for (i = max; --i >= 0; )
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{
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_Jv_Method *method = &methods[i];
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if (method->name == NULL
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&& ! _Jv_equalUtf8Consts (method->name, init_name))
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continue;
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if (declared
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&& ! java::lang::reflect::Modifier::isPublic(method->accflags))
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continue;
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numConstructors++;
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}
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JArray<java::lang::reflect::Constructor *> *result
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= (JArray<java::lang::reflect::Constructor *> *)
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JvNewObjectArray (numConstructors, &ConstructorClass, NULL);
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java::lang::reflect::Constructor** cptr = elements (result);
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for (i = 0; i < max; i++)
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{
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_Jv_Method *method = &methods[i];
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if (method->name == NULL
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&& ! _Jv_equalUtf8Consts (method->name, init_name))
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continue;
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if (declared
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&& ! java::lang::reflect::Modifier::isPublic(method->accflags))
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continue;
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java::lang::reflect::Constructor *cons
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= new java::lang::reflect::Constructor ();
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cons->offset = (char *) method - (char *) methods;
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cons->declaringClass = this;
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*cptr++ = cons;
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}
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return result;
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}
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java::lang::reflect::Constructor *
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java::lang::Class::getDeclaredConstructor (JArray<jclass> *param_types)
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{
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jstring partial_sig = getSignature (param_types);
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jint hash = partial_sig->hashCode ();
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int i = isPrimitive () ? 0 : method_count;
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while (--i >= 0)
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{
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// FIXME: access checks.
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if (_Jv_equalUtf8Consts (methods[i].name, init_name)
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&& _Jv_equal (methods[i].signature, partial_sig, hash))
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{
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// Found it.
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using namespace java::lang::reflect;
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Constructor *cons = new Constructor ();
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cons->offset = (char *) (&methods[i]) - (char *) methods;
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cons->declaringClass = this;
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return cons;
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}
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}
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JvThrow (new java::lang::NoSuchMethodException);
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}
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java::lang::reflect::Field *
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java::lang::Class::getField (jstring name, jint hash)
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{
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java::lang::reflect::Field* rfield;
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for (int i = 0; i < field_count; i++)
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{
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_Jv_Field *field = &fields[i];
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if (! _Jv_equal (field->name, name, hash))
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continue;
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if (! (field->getModifiers() & java::lang::reflect::Modifier::PUBLIC))
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continue;
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rfield = new java::lang::reflect::Field ();
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rfield->offset = (char*) field - (char*) fields;
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rfield->declaringClass = this;
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rfield->name = name;
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return rfield;
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}
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jclass superclass = getSuperclass();
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if (superclass == NULL)
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return NULL;
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rfield = superclass->getField(name, hash);
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for (int i = 0; i < interface_count && rfield == NULL; ++i)
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rfield = interfaces[i]->getField (name, hash);
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return rfield;
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}
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java::lang::reflect::Field *
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java::lang::Class::getDeclaredField (jstring name)
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{
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java::lang::SecurityManager *s = java::lang::System::getSecurityManager();
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if (s != NULL)
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s->checkMemberAccess (this, java::lang::reflect::Member::DECLARED);
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int hash = name->hashCode();
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for (int i = 0; i < field_count; i++)
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{
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_Jv_Field *field = &fields[i];
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if (! _Jv_equal (field->name, name, hash))
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continue;
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java::lang::reflect::Field* rfield = new java::lang::reflect::Field ();
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rfield->offset = (char*) field - (char*) fields;
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rfield->declaringClass = this;
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rfield->name = name;
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return rfield;
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}
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JvThrow (new java::lang::NoSuchFieldException (name));
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}
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JArray<java::lang::reflect::Field *> *
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java::lang::Class::getDeclaredFields (void)
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{
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java::lang::SecurityManager *s = java::lang::System::getSecurityManager();
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if (s != NULL)
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s->checkMemberAccess (this, java::lang::reflect::Member::DECLARED);
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JArray<java::lang::reflect::Field *> *result
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= (JArray<java::lang::reflect::Field *> *)
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JvNewObjectArray (field_count, &FieldClass, NULL);
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java::lang::reflect::Field** fptr = elements (result);
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for (int i = 0; i < field_count; i++)
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{
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_Jv_Field *field = &fields[i];
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java::lang::reflect::Field* rfield = new java::lang::reflect::Field ();
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rfield->offset = (char*) field - (char*) fields;
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rfield->declaringClass = this;
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*fptr++ = rfield;
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}
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return result;
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}
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void
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java::lang::Class::getSignature (java::lang::StringBuffer *buffer)
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{
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if (isPrimitive())
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buffer->append((jchar) method_count);
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else
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{
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jstring name = getName();
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if (name->charAt(0) != '[')
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buffer->append((jchar) 'L');
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buffer->append(name);
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if (name->charAt(0) != '[')
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buffer->append((jchar) ';');
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}
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}
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// This doesn't have to be native. It is an implementation detail
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// only called from the C++ code, though, so maybe this is clearer.
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jstring
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java::lang::Class::getSignature (JArray<jclass> *param_types)
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{
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java::lang::StringBuffer *buf = new java::lang::StringBuffer ();
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buf->append((jchar) '(');
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jclass *v = elements (param_types);
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for (int i = 0; i < param_types->length; ++i)
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v[i]->getSignature(buf);
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buf->append((jchar) ')');
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return buf->toString();
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}
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java::lang::reflect::Method *
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java::lang::Class::getDeclaredMethod (jstring name,
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JArray<jclass> *param_types)
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{
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jstring partial_sig = getSignature (param_types);
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jint p_len = partial_sig->length();
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_Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
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int i = isPrimitive () ? 0 : method_count;
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while (--i >= 0)
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{
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// FIXME: access checks.
|
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if (_Jv_equalUtf8Consts (methods[i].name, utf_name)
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&& _Jv_equaln (methods[i].signature, partial_sig, p_len))
|
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{
|
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// Found it.
|
||
using namespace java::lang::reflect;
|
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Method *rmethod = new Method ();
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rmethod->offset = (char*) (&methods[i]) - (char*) methods;
|
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rmethod->declaringClass = this;
|
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}
|
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}
|
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JvThrow (new java::lang::NoSuchMethodException);
|
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}
|
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|
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JArray<java::lang::reflect::Method *> *
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java::lang::Class::getDeclaredMethods (void)
|
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{
|
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int numMethods = 0;
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int max = isPrimitive () ? 0 : method_count;
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int i;
|
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for (i = max; --i >= 0; )
|
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{
|
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_Jv_Method *method = &methods[i];
|
||
if (method->name == NULL
|
||
|| _Jv_equalUtf8Consts (method->name, clinit_name)
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||
|| _Jv_equalUtf8Consts (method->name, init_name))
|
||
continue;
|
||
numMethods++;
|
||
}
|
||
JArray<java::lang::reflect::Method *> *result
|
||
= (JArray<java::lang::reflect::Method *> *)
|
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JvNewObjectArray (numMethods, &MethodClass, NULL);
|
||
java::lang::reflect::Method** mptr = elements (result);
|
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for (i = 0; i < max; i++)
|
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{
|
||
_Jv_Method *method = &methods[i];
|
||
if (method->name == NULL
|
||
|| _Jv_equalUtf8Consts (method->name, clinit_name)
|
||
|| _Jv_equalUtf8Consts (method->name, init_name))
|
||
continue;
|
||
java::lang::reflect::Method* rmethod
|
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= new java::lang::reflect::Method ();
|
||
rmethod->offset = (char*) method - (char*) methods;
|
||
rmethod->declaringClass = this;
|
||
*mptr++ = rmethod;
|
||
}
|
||
return result;
|
||
}
|
||
|
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jstring
|
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java::lang::Class::getName (void)
|
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{
|
||
char buffer[name->length + 1];
|
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memcpy (buffer, name->data, name->length);
|
||
buffer[name->length] = '\0';
|
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return _Jv_NewStringUTF (buffer);
|
||
}
|
||
|
||
JArray<jclass> *
|
||
java::lang::Class::getClasses (void)
|
||
{
|
||
// FIXME: implement.
|
||
return NULL;
|
||
}
|
||
|
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JArray<jclass> *
|
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java::lang::Class::getDeclaredClasses (void)
|
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{
|
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checkMemberAccess (java::lang::reflect::Member::DECLARED);
|
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JvFail ("java::lang::Class::getDeclaredClasses not implemented");
|
||
return NULL; // Placate compiler.
|
||
}
|
||
|
||
// This is marked as unimplemented in the JCL book.
|
||
jclass
|
||
java::lang::Class::getDeclaringClass (void)
|
||
{
|
||
JvFail ("java::lang::Class::getDeclaringClass unimplemented");
|
||
return NULL; // Placate compiler.
|
||
}
|
||
|
||
jint
|
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java::lang::Class::_getFields (JArray<java::lang::reflect::Field *> *result,
|
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jint offset)
|
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{
|
||
int count = 0;
|
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for (int i = 0; i < field_count; i++)
|
||
{
|
||
_Jv_Field *field = &fields[i];
|
||
if (! (field->getModifiers() & java::lang::reflect::Modifier::PUBLIC))
|
||
continue;
|
||
++count;
|
||
|
||
if (result != NULL)
|
||
{
|
||
java::lang::reflect::Field *rfield
|
||
= new java::lang::reflect::Field ();
|
||
rfield->offset = (char *) field - (char *) fields;
|
||
rfield->declaringClass = this;
|
||
rfield->name = _Jv_NewStringUtf8Const (field->name);
|
||
(elements (result))[offset + i] = rfield;
|
||
}
|
||
}
|
||
jclass superclass = getSuperclass();
|
||
if (superclass != NULL)
|
||
{
|
||
int s_count = superclass->_getFields (result, offset);
|
||
count += s_count;
|
||
offset += s_count;
|
||
}
|
||
for (int i = 0; i < interface_count; ++i)
|
||
{
|
||
int f_count = interfaces[i]->_getFields (result, offset);
|
||
count += f_count;
|
||
offset += f_count;
|
||
}
|
||
return count;
|
||
}
|
||
|
||
JArray<java::lang::reflect::Field *> *
|
||
java::lang::Class::getFields (void)
|
||
{
|
||
using namespace java::lang::reflect;
|
||
|
||
int count = _getFields (NULL, 0);
|
||
|
||
JArray<java::lang::reflect::Field *> *result
|
||
= ((JArray<java::lang::reflect::Field *> *)
|
||
JvNewObjectArray (count, &FieldClass, NULL));
|
||
|
||
_getFields (result, 0);
|
||
|
||
return result;
|
||
}
|
||
|
||
JArray<jclass> *
|
||
java::lang::Class::getInterfaces (void)
|
||
{
|
||
jobjectArray r = JvNewObjectArray (interface_count, getClass (), NULL);
|
||
jobject *data = elements (r);
|
||
for (int i = 0; i < interface_count; ++i)
|
||
data[i] = interfaces[i];
|
||
return reinterpret_cast<JArray<jclass> *> (r);
|
||
}
|
||
|
||
java::lang::reflect::Method *
|
||
java::lang::Class::getMethod (jstring name, JArray<jclass> *param_types)
|
||
{
|
||
jstring partial_sig = getSignature (param_types);
|
||
jint p_len = partial_sig->length();
|
||
_Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
|
||
for (Class *klass = this; klass; klass = klass->getSuperclass())
|
||
{
|
||
int i = klass->isPrimitive () ? 0 : klass->method_count;
|
||
while (--i >= 0)
|
||
{
|
||
// FIXME: access checks.
|
||
if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
|
||
&& _Jv_equaln (klass->methods[i].signature, partial_sig, p_len))
|
||
{
|
||
// Found it.
|
||
using namespace java::lang::reflect;
|
||
Method *rmethod = new Method ();
|
||
rmethod->offset = (char*) (&klass->methods[i]) - (char*) methods;
|
||
rmethod->declaringClass = klass;
|
||
return rmethod;
|
||
}
|
||
}
|
||
}
|
||
JvThrow (new java::lang::NoSuchMethodException);
|
||
}
|
||
|
||
JArray<java::lang::reflect::Method *> *
|
||
java::lang::Class::getMethods (void)
|
||
{
|
||
JvFail ("java::lang::Class::getMethods not implemented");
|
||
}
|
||
|
||
jboolean
|
||
java::lang::Class::isAssignableFrom (jclass klass)
|
||
{
|
||
if (this == klass)
|
||
return true;
|
||
// Primitive types must be equal, which we just tested for.
|
||
if (isPrimitive () || ! klass || klass->isPrimitive())
|
||
return false;
|
||
|
||
// If target is array, so must source be.
|
||
if (isArray ())
|
||
{
|
||
if (! klass->isArray())
|
||
return false;
|
||
return getComponentType()->isAssignableFrom(klass->getComponentType());
|
||
}
|
||
|
||
if (isAssignableFrom (klass->getSuperclass()))
|
||
return true;
|
||
|
||
if (isInterface())
|
||
{
|
||
// See if source implements this interface.
|
||
for (int i = 0; i < klass->interface_count; ++i)
|
||
{
|
||
jclass interface = klass->interfaces[i];
|
||
// FIXME: ensure that class is prepared here.
|
||
// See Spec 12.3.2.
|
||
if (isAssignableFrom (interface))
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
jboolean
|
||
java::lang::Class::isInstance (jobject obj)
|
||
{
|
||
if (! obj || isPrimitive ())
|
||
return false;
|
||
return isAssignableFrom (obj->getClass());
|
||
}
|
||
|
||
jboolean
|
||
java::lang::Class::isInterface (void)
|
||
{
|
||
return (accflags & java::lang::reflect::Modifier::INTERFACE) != 0;
|
||
}
|
||
|
||
jobject
|
||
java::lang::Class::newInstance (void)
|
||
{
|
||
// FIXME: do accessibility checks here. There currently doesn't
|
||
// seem to be any way to do these.
|
||
// FIXME: we special-case one check here just to pass a Plum Hall
|
||
// test. Once access checking is implemented, remove this.
|
||
if (this == &ClassClass)
|
||
JvThrow (new java::lang::IllegalAccessException);
|
||
|
||
if (isPrimitive ()
|
||
|| isInterface ()
|
||
|| isArray ()
|
||
|| java::lang::reflect::Modifier::isAbstract(accflags))
|
||
JvThrow (new java::lang::InstantiationException);
|
||
|
||
_Jv_InitClass (this);
|
||
|
||
_Jv_Method *meth = _Jv_GetMethodLocal (this, init_name, void_signature);
|
||
if (! meth)
|
||
JvThrow (new java::lang::NoSuchMethodException);
|
||
|
||
jobject r = JvAllocObject (this);
|
||
((void (*) (jobject)) meth->ncode) (r);
|
||
return r;
|
||
}
|
||
|
||
void
|
||
java::lang::Class::finalize (void)
|
||
{
|
||
#ifdef INTERPRETER
|
||
JvAssert (_Jv_IsInterpretedClass (this));
|
||
_Jv_UnregisterClass (this);
|
||
#endif
|
||
}
|
||
|
||
// FIXME.
|
||
void
|
||
java::lang::Class::hackRunInitializers (void)
|
||
{
|
||
_Jv_Method *meth = _Jv_GetMethodLocal (this, clinit_name, void_signature);
|
||
if (meth)
|
||
((void (*) (void)) meth->ncode) ();
|
||
}
|
||
|
||
// This implements the initialization process for a class. From Spec
|
||
// section 12.4.2.
|
||
void
|
||
java::lang::Class::initializeClass (void)
|
||
{
|
||
// Short-circuit to avoid needless locking.
|
||
if (state == JV_STATE_DONE)
|
||
return;
|
||
|
||
// do this before we enter the monitor below, since this can cause
|
||
// exceptions. Here we assume, that reading "state" is an atomic
|
||
// operation, I pressume that is true? --Kresten
|
||
if (state < JV_STATE_LINKED)
|
||
{
|
||
#ifdef INTERPRETER
|
||
if (_Jv_IsInterpretedClass (this))
|
||
{
|
||
java::lang::ClassLoader::resolveClass0 (this);
|
||
|
||
// Step 1.
|
||
_Jv_MonitorEnter (this);
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
// Step 1.
|
||
_Jv_MonitorEnter (this);
|
||
_Jv_PrepareCompiledClass (this);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
// Step 1.
|
||
_Jv_MonitorEnter (this);
|
||
}
|
||
|
||
// Step 2.
|
||
java::lang::Thread *self = java::lang::Thread::currentThread();
|
||
// FIXME: `self' can be null at startup. Hence this nasty trick.
|
||
self = (java::lang::Thread *) ((long) self | 1);
|
||
while (state == JV_STATE_IN_PROGRESS && thread && thread != self)
|
||
wait ();
|
||
|
||
// Steps 3 & 4.
|
||
if (state == JV_STATE_DONE || state == JV_STATE_IN_PROGRESS || thread == self)
|
||
{
|
||
_Jv_MonitorExit (this);
|
||
return;
|
||
}
|
||
|
||
// Step 5.
|
||
if (state == JV_STATE_ERROR)
|
||
{
|
||
_Jv_MonitorExit (this);
|
||
JvThrow (new java::lang::NoClassDefFoundError);
|
||
}
|
||
|
||
// Step 6.
|
||
thread = self;
|
||
state = JV_STATE_IN_PROGRESS;
|
||
_Jv_MonitorExit (this);
|
||
|
||
// Step 7.
|
||
if (! isInterface () && superclass)
|
||
{
|
||
// FIXME: We can't currently catch a Java exception in C++ code.
|
||
// So instead we call a Java trampoline. It returns an
|
||
// exception, or null.
|
||
jobject except = superclass->hackTrampoline(0, NULL);
|
||
if (except)
|
||
{
|
||
// Caught an exception.
|
||
_Jv_MonitorEnter (this);
|
||
state = JV_STATE_ERROR;
|
||
notifyAll ();
|
||
_Jv_MonitorExit (this);
|
||
JvThrow (except);
|
||
}
|
||
}
|
||
|
||
// Step 8.
|
||
// FIXME: once again we have to go through a trampoline.
|
||
java::lang::Throwable *except = hackTrampoline (1, NULL);
|
||
|
||
// Steps 9, 10, 11.
|
||
if (! except)
|
||
{
|
||
_Jv_MonitorEnter (this);
|
||
state = JV_STATE_DONE;
|
||
}
|
||
else
|
||
{
|
||
if (! ErrorClass.isInstance(except))
|
||
{
|
||
// Once again we must use the trampoline. In this case we
|
||
// have to detect an OutOfMemoryError.
|
||
except = hackTrampoline(2, except);
|
||
}
|
||
_Jv_MonitorEnter (this);
|
||
state = JV_STATE_ERROR;
|
||
}
|
||
notifyAll ();
|
||
_Jv_MonitorExit (this);
|
||
if (except)
|
||
JvThrow (except);
|
||
}
|
||
|
||
|
||
|
||
//
|
||
// Some class-related convenience functions.
|
||
//
|
||
|
||
// Find a method declared in the class. If it is not declared locally
|
||
// (or if it is inherited), return NULL.
|
||
_Jv_Method *
|
||
_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
|
||
_Jv_Utf8Const *signature)
|
||
{
|
||
for (int i = 0; i < klass->method_count; ++i)
|
||
{
|
||
if (_Jv_equalUtf8Consts (name, klass->methods[i].name)
|
||
&& _Jv_equalUtf8Consts (signature, klass->methods[i].signature))
|
||
return &klass->methods[i];
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
_Jv_Method *
|
||
_Jv_LookupDeclaredMethod (jclass klass, _Jv_Utf8Const *name,
|
||
_Jv_Utf8Const *signature)
|
||
{
|
||
for (; klass; klass = klass->getSuperclass())
|
||
{
|
||
_Jv_Method *meth = _Jv_GetMethodLocal (klass, name, signature);
|
||
|
||
if (meth)
|
||
return meth;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
// NOTE: MCACHE_SIZE should be a power of 2 minus one.
|
||
#define MCACHE_SIZE 1023
|
||
|
||
struct _Jv_mcache
|
||
{
|
||
jclass klass;
|
||
_Jv_Method *method;
|
||
};
|
||
|
||
static _Jv_mcache method_cache[MCACHE_SIZE + 1];
|
||
|
||
static void *
|
||
_Jv_FindMethodInCache (jclass klass,
|
||
_Jv_Utf8Const *name,
|
||
_Jv_Utf8Const *signature)
|
||
{
|
||
int index = name->hash & MCACHE_SIZE;
|
||
_Jv_mcache *mc = method_cache + index;
|
||
_Jv_Method *m = mc->method;
|
||
|
||
if (mc->klass == klass
|
||
&& m != NULL // thread safe check
|
||
&& _Jv_equalUtf8Consts (m->name, name)
|
||
&& _Jv_equalUtf8Consts (m->signature, signature))
|
||
return mc->method->ncode;
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
_Jv_AddMethodToCache (jclass klass,
|
||
_Jv_Method *method)
|
||
{
|
||
_Jv_MonitorEnter (&ClassClass);
|
||
|
||
int index = method->name->hash & MCACHE_SIZE;
|
||
|
||
method_cache[index].method = method;
|
||
method_cache[index].klass = klass;
|
||
|
||
_Jv_MonitorExit (&ClassClass);
|
||
}
|
||
|
||
void *
|
||
_Jv_LookupInterfaceMethod (jclass klass, _Jv_Utf8Const *name,
|
||
_Jv_Utf8Const *signature)
|
||
{
|
||
void *ncode = _Jv_FindMethodInCache (klass, name, signature);
|
||
if (ncode != 0)
|
||
return ncode;
|
||
|
||
for (; klass; klass = klass->getSuperclass())
|
||
{
|
||
_Jv_Method *meth = _Jv_GetMethodLocal (klass, name, signature);
|
||
if (! meth)
|
||
continue;
|
||
|
||
if (java::lang::reflect::Modifier::isStatic(meth->accflags))
|
||
JvThrow (new java::lang::IncompatibleClassChangeError);
|
||
if (java::lang::reflect::Modifier::isAbstract(meth->accflags))
|
||
JvThrow (new java::lang::AbstractMethodError);
|
||
if (! java::lang::reflect::Modifier::isPublic(meth->accflags))
|
||
JvThrow (new java::lang::IllegalAccessError);
|
||
|
||
_Jv_AddMethodToCache (klass, meth);
|
||
|
||
return meth->ncode;
|
||
}
|
||
JvThrow (new java::lang::IncompatibleClassChangeError);
|
||
return NULL; // Placate compiler.
|
||
}
|
||
|
||
void
|
||
_Jv_InitClass (jclass klass)
|
||
{
|
||
klass->initializeClass();
|
||
}
|
||
|
||
jboolean
|
||
_Jv_IsInstanceOf(jobject obj, jclass cl)
|
||
{
|
||
return cl->isInstance(obj);
|
||
}
|