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/*
* Copyright (c) 1994, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*-
* Implementation of class Class
*
* former threadruntime.c, Sun Sep 22 12:09:39 1991
*/
#include <string.h>
#include <stdlib.h>
#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "check_classname.h"
#include "java_lang_Class.h"
/* defined in libverify.so/verify.dll (src file common/check_format.c) */
extern jboolean VerifyClassname(char *utf_name, jboolean arrayAllowed);
extern jboolean VerifyFixClassname(char *utf_name);
#define OBJ "Ljava/lang/Object;"
#define CLS "Ljava/lang/Class;"
#define CPL "Ljdk/internal/reflect/ConstantPool;"
#define STR "Ljava/lang/String;"
#define FLD "Ljava/lang/reflect/Field;"
#define MHD "Ljava/lang/reflect/Method;"
#define CTR "Ljava/lang/reflect/Constructor;"
#define PD "Ljava/security/ProtectionDomain;"
#define BA "[B"
#define RC "Ljava/lang/reflect/RecordComponent;"
static JNINativeMethod methods[] = {
{"initClassName", "()" STR, (void *)&JVM_InitClassName},
{"getSuperclass", "()" CLS, NULL},
{"getInterfaces0", "()[" CLS, (void *)&JVM_GetClassInterfaces},
{"isInterface", "()Z", (void *)&JVM_IsInterface},
{"getSigners", "()[" OBJ, (void *)&JVM_GetClassSigners},
{"setSigners", "([" OBJ ")V", (void *)&JVM_SetClassSigners},
{"isArray", "()Z", (void *)&JVM_IsArrayClass},
{"isHidden", "()Z", (void *)&JVM_IsHiddenClass},
{"isPrimitive", "()Z", (void *)&JVM_IsPrimitiveClass},
{"getModifiers", "()I", (void *)&JVM_GetClassModifiers},
{"getDeclaredFields0","(Z)[" FLD, (void *)&JVM_GetClassDeclaredFields},
{"getDeclaredMethods0","(Z)[" MHD, (void *)&JVM_GetClassDeclaredMethods},
{"getDeclaredConstructors0","(Z)[" CTR, (void *)&JVM_GetClassDeclaredConstructors},
{"getProtectionDomain0", "()" PD, (void *)&JVM_GetProtectionDomain},
{"getDeclaredClasses0", "()[" CLS, (void *)&JVM_GetDeclaredClasses},
{"getDeclaringClass0", "()" CLS, (void *)&JVM_GetDeclaringClass},
{"getSimpleBinaryName0", "()" STR, (void *)&JVM_GetSimpleBinaryName},
{"getGenericSignature0", "()" STR, (void *)&JVM_GetClassSignature},
{"getRawAnnotations", "()" BA, (void *)&JVM_GetClassAnnotations},
{"getConstantPool", "()" CPL, (void *)&JVM_GetClassConstantPool},
{"desiredAssertionStatus0","("CLS")Z", (void *)&JVM_DesiredAssertionStatus},
{"getEnclosingMethod0", "()[" OBJ, (void *)&JVM_GetEnclosingMethodInfo},
{"getRawTypeAnnotations", "()" BA, (void *)&JVM_GetClassTypeAnnotations},
{"getNestHost0", "()" CLS, (void *)&JVM_GetNestHost},
{"getNestMembers0", "()[" CLS, (void *)&JVM_GetNestMembers},
{"getRecordComponents0", "()[" RC, (void *)&JVM_GetRecordComponents},
{"isRecord0", "()Z", (void *)&JVM_IsRecord},
{"getPermittedSubclasses0", "()[" CLS, (void *)&JVM_GetPermittedSubclasses},
{"getClassFileVersion0", "()I", (void *)&JVM_GetClassFileVersion},
{"getClassAccessFlagsRaw0", "()I", (void *)&JVM_GetClassAccessFlags},
};
#undef OBJ
#undef CLS
#undef STR
#undef FLD
#undef MHD
#undef CTR
#undef PD
JNIEXPORT void JNICALL
Java_java_lang_Class_registerNatives(JNIEnv *env, jclass cls)
{
methods[1].fnPtr = (void *)(*env)->GetSuperclass;
(*env)->RegisterNatives(env, cls, methods,
sizeof(methods)/sizeof(JNINativeMethod));
}
JNIEXPORT jclass JNICALL
Java_java_lang_Class_forName0(JNIEnv *env, jclass this, jstring classname,
jboolean initialize, jobject loader, jclass caller)
{
char *clname;
jclass cls = 0;
char buf[128];
jsize len;
jsize unicode_len;
if (classname == NULL) {
JNU_ThrowNullPointerException(env, 0);
return 0;
}
len = (*env)->GetStringUTFLength(env, classname);
unicode_len = (*env)->GetStringLength(env, classname);
if (len >= (jsize)sizeof(buf)) {
clname = malloc(len + 1);
if (clname == NULL) {
JNU_ThrowOutOfMemoryError(env, NULL);
return NULL;
}
} else {
clname = buf;
}
(*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname);
if (verifyFixClassname(clname) == JNI_TRUE) {
/* slashes present in clname, use name b4 translation for exception */
(*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname);
JNU_ThrowClassNotFoundException(env, clname);
goto done;
}
if (!verifyClassname(clname, JNI_TRUE)) { /* expects slashed name */
JNU_ThrowClassNotFoundException(env, clname);
goto done;
}
cls = JVM_FindClassFromCaller(env, clname, initialize, loader, caller);
done:
if (clname != buf) {
free(clname);
}
return cls;
}
JNIEXPORT jboolean JNICALL
Java_java_lang_Class_isInstance(JNIEnv *env, jobject cls, jobject obj)
{
if (obj == NULL) {
return JNI_FALSE;
}
return (*env)->IsInstanceOf(env, obj, (jclass)cls);
}
JNIEXPORT jboolean JNICALL
Java_java_lang_Class_isAssignableFrom(JNIEnv *env, jobject cls, jobject cls2)
{
if (cls2 == NULL) {
JNU_ThrowNullPointerException(env, 0);
return JNI_FALSE;
}
return (*env)->IsAssignableFrom(env, cls2, cls);
}
JNIEXPORT jclass JNICALL
Java_java_lang_Class_getPrimitiveClass(JNIEnv *env,
jclass cls,
jstring name)
{
const char *utfName;
jclass result;
if (name == NULL) {
JNU_ThrowNullPointerException(env, 0);
return NULL;
}
utfName = (*env)->GetStringUTFChars(env, name, 0);
if (utfName == 0)
return NULL;
result = JVM_FindPrimitiveClass(env, utfName);
(*env)->ReleaseStringUTFChars(env, name, utfName);
return result;
}
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet)
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