/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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*
* 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 .
*
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*/
/*
* @ test
* @ summary Verifies the behaviour of Unsafe . defineClass
* @ library / test / lib
* @ modules java . base / jdk . internal . misc
* java . compiler
* java . management
* @ run main DefineClass
*/
import java.security.ProtectionDomain;
import jdk.test.lib.compiler.InMemoryJavaCompiler;
import jdk.internal.misc.Unsafe;
import static jdk.test.lib.Asserts.*;
public class DefineClass {
public static void main(String args[]) throws Exception {
Unsafe unsafe = Unsafe.getUnsafe();
TestClassLoader classloader = new TestClassLoader();
ProtectionDomain pd = new ProtectionDomain(null , null );
byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass" , "class TestClass { }" );
// Invalid class data
try {
unsafe.defineClass(null , klassbuf, 4 , klassbuf.length - 4 , classloader, pd);
throw new RuntimeException("defineClass did not throw expected ClassFormatError" );
} catch (ClassFormatError e) {
// Expected
}
// Negative offset
try {
unsafe.defineClass(null , klassbuf, -1 , klassbuf.length, classloader, pd);
throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException" );
} catch (IndexOutOfBoundsException e) {
// Expected
}
// Negative length
try {
unsafe.defineClass(null , klassbuf, 0 , -1 , classloader, pd);
throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException" );
} catch (IndexOutOfBoundsException e) {
// Expected
}
// Offset greater than klassbuf.length
try {
unsafe.defineClass(null , klassbuf, klassbuf.length + 1 , klassbuf.length, classloader, pd);
throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException" );
} catch (IndexOutOfBoundsException e) {
// Expected
}
// Length greater than klassbuf.length
try {
unsafe.defineClass(null , klassbuf, 0 , klassbuf.length + 1 , classloader, pd);
throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException" );
} catch (IndexOutOfBoundsException e) {
// Expected
}
Class klass = unsafe.defineClass(null , klassbuf, 0 , klassbuf.length, classloader, pd);
assertEquals(klass.getClassLoader(), classloader);
assertEquals(klass.getProtectionDomain(), pd);
}
private static class TestClassLoader extends ClassLoader {
public TestClassLoader(ClassLoader parent) {
super (parent);
}
public TestClassLoader() {
super ();
}
}
}
Messung V0.5 in Prozent C=89 H=97 G=93
¤ Dauer der Verarbeitung: 0.19 Sekunden
(vorverarbeitet am 2026-10-01)
¤
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