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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/lang/invoke/lookup/LookupClassTest.java Normal file
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/*
* Copyright (c) 2019, 2026, 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 8173975
* @summary Lookup::in throws IAE if the target class is a primitive class or array class
* @run junit/othervm LookupClassTest
*/
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
public class LookupClassTest {
private static final LookupClassTest[] ARRAY = new LookupClassTest[0];
@BeforeAll
public static void test() {
assertTrue(ARRAY.getClass().isArray());
assertSamePackage(MethodHandles.lookup(), ARRAY.getClass());
assertSamePackage(MethodHandles.publicLookup(), int.class);
}
private static void assertSamePackage(Lookup lookup, Class<?> targetClass) {
assertEquals(targetClass.getPackageName(), lookup.lookupClass().getPackageName());
}
@Test
public void arrayLookupClass() {
Lookup lookup = MethodHandles.lookup();
assertThrows(IllegalArgumentException.class, () -> lookup.in(ARRAY.getClass()));
}
@Test
public void primitiveLookupClass() {
Lookup lookup = MethodHandles.publicLookup();
assertThrows(IllegalArgumentException.class, () -> lookup.in(int.class));
}
@Test
public void voidLookupClass() {
Lookup lookup = MethodHandles.publicLookup();
assertThrows(IllegalArgumentException.class, () -> lookup.in(void.class));
}
}