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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/VarArgsTest.java Normal file
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/*
* Copyright (c) 2016, 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
* @summary unit tests for java.lang.invoke.MethodHandles
* @run junit/othervm -ea -esa test.java.lang.invoke.VarArgsTest
*/
package test.java.lang.invoke;
import java.lang.invoke.MethodHandle;
import java.util.Arrays;
import java.util.List;
import static java.lang.invoke.MethodHandles.*;
import static java.lang.invoke.MethodType.*;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
public class VarArgsTest {
@Test
public void testWithVarargs() throws Throwable {
MethodHandle deepToString = publicLookup()
.findStatic(Arrays.class, "deepToString", methodType(String.class, Object[].class));
assertFalse(deepToString.isVarargsCollector());
MethodHandle ts = deepToString.withVarargs(false);
assertFalse(ts.isVarargsCollector());
MethodHandle ts1 = deepToString.withVarargs(true);
assertTrue(ts1.isVarargsCollector());
assertEquals("[won]", (String) ts1.invokeExact(new Object[]{"won"}));
assertEquals("[won]", (String) ts1.invoke(new Object[]{"won"}));
assertEquals("[won]", (String) ts1.invoke("won"));
assertEquals("[won, won]", (String) ts1.invoke("won", "won"));
assertEquals("[won, won]", (String) ts1.invoke(new Object[]{"won", "won"}));
assertEquals("[[won]]", (String) ts1.invoke((Object) new Object[]{"won"}));
}
@Test
public void testWithVarargs2() throws Throwable {
MethodHandle asList = publicLookup()
.findStatic(Arrays.class, "asList", methodType(List.class, Object[].class));
MethodHandle asListWithVarargs = asList.withVarargs(asList.isVarargsCollector());
assertTrue(asListWithVarargs.isVarargsCollector());
assertEquals("[]", asListWithVarargs.invoke().toString());
assertEquals("[1]", asListWithVarargs.invoke(1).toString());
assertEquals("[two, too]", asListWithVarargs.invoke("two", "too").toString());
}
@Test
public void testWithVarargsIAE() throws Throwable {
MethodHandle lenMH = publicLookup()
.findVirtual(String.class, "length", methodType(int.class));
assertThrows(IllegalArgumentException.class, () -> lenMH.withVarargs(true));
}
}