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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/VarHandles/IndirectVarHandleTest.java Normal file
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/*
* Copyright (c) 2023, 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 8307508
* @run junit IndirectVarHandleTest
* @summary Test VarHandle::isAccessModeSupported on indirect VarHandle
* produced by MethodHandles.filterCoordinates
*/
import org.junit.jupiter.api.Test;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.invoke.VarHandle;
import java.util.function.IntUnaryOperator;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class IndirectVarHandleTest {
@Test
public void testIsAccessModeTypeSupported() throws Throwable {
var lookup = MethodHandles.lookup();
var intArrayVh = MethodHandles.arrayElementVarHandle(int[].class);
var addOne = lookup.bind((IntUnaryOperator) a -> a + 1, "applyAsInt",
MethodType.methodType(int.class, int.class));
var offsetIntArrayVh = MethodHandles.filterCoordinates(intArrayVh, 1, addOne);
for (var mode : VarHandle.AccessMode.values()) {
assertEquals(intArrayVh.isAccessModeSupported(mode),
offsetIntArrayVh.isAccessModeSupported(mode), mode.toString());
}
var stringArrayVh = MethodHandles.arrayElementVarHandle(String[].class);
var offsetStringArrayVh = MethodHandles.filterCoordinates(stringArrayVh, 1, addOne);
for (var mode : VarHandle.AccessMode.values()) {
assertEquals(stringArrayVh.isAccessModeSupported(mode),
offsetStringArrayVh.isAccessModeSupported(mode), mode.toString());
}
}
}