8268250: Class.arrayType() for a 255-d array throws undocumented IllegalArgumentException

Reviewed-by: sundar, alanb
This commit is contained in:
Joe Darcy 2022-02-17 17:12:40 +00:00
parent d0e11808fd
commit 4c7f8b49a4
2 changed files with 59 additions and 1 deletions
src/java.base/share/classes/java/lang
test/jdk/java/lang/Class

@ -4485,12 +4485,21 @@ public final class Class<T> implements java.io.Serializable,
* Returns a {@code Class} for an array type whose component type
* is described by this {@linkplain Class}.
*
* @throws UnsupportedOperationException if this component type is {@linkplain
* Void#TYPE void} or if the number of dimensions of the resulting array
* type would exceed 255.
* @return a {@code Class} describing the array type
* @jvms 4.3.2 Field Descriptors
* @jvms 4.4.1 The {@code CONSTANT_Class_info} Structure
* @since 12
*/
@Override
public Class<?> arrayType() {
return Array.newInstance(this, 0).getClass();
try {
return Array.newInstance(this, 0).getClass();
} catch (IllegalArgumentException iae) {
throw new UnsupportedOperationException(iae);
}
}
/**

@ -0,0 +1,49 @@
/*
* Copyright (c) 2021, 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.
*
* 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.
*/
/*
* @test
* @bug 8268250
* @summary Check exceptional behavior of Class.arrayType
*/
import java.lang.reflect.*;
import java.util.function.*;
public class ArrayType {
public static void main(String... args) {
expectException(() -> Void.TYPE);
expectException(() -> Array.newInstance(int.class, new int[255])
.getClass());
}
private static void expectException(Supplier<Class<?>> arrayTypeArg) {
try {
Class<?> arrayClazz = arrayTypeArg.get().arrayType();
throw new RuntimeException("Expected exception not thrown: " +
arrayClazz);
} catch (UnsupportedOperationException uoe) {
; // Expected
}
}
}