TestIllegalLink.java

/*
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 *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 *  This code is free software; you can redistribute it and/or modify it
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 *  published by the Free Software Foundation.
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 *  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
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/*
 * @test
 * @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
 * @run testng/othervm -Dforeign.restricted=permit TestIllegalLink
 */

import jdk.incubator.foreign.CLinker;
import jdk.incubator.foreign.FunctionDescriptor;
import jdk.incubator.foreign.MemoryAddress;
import jdk.incubator.foreign.MemoryLayout;
import jdk.incubator.foreign.MemoryLayouts;
import jdk.incubator.foreign.MemorySegment;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.lang.invoke.MethodType;

import static jdk.incubator.foreign.CLinker.C_INT;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;

public class TestIllegalLink {

    private static final MemoryAddress dummyTarget = MemoryAddress.NULL;
    private static final CLinker ABI = CLinker.getInstance();

    @Test(dataProvider = "types")
    public void testTypeMismatch(MethodType mt, FunctionDescriptor desc, String expectedExceptionMessage) {
        try {
            ABI.downcallHandle(dummyTarget, mt, desc);
            fail("Expected IllegalArgumentException was not thrown");
        } catch (IllegalArgumentException e) {
            assertTrue(e.getMessage().contains(expectedExceptionMessage));
        }
    }

    @DataProvider
    public static Object[][] types() {
        return new Object[][]{
            {
                MethodType.methodType(void.class),
                FunctionDescriptor.of(C_INT),
                "Return type mismatch"
            },
            {
                MethodType.methodType(void.class),
                FunctionDescriptor.ofVoid(C_INT),
                "Arity mismatch"
            },
            {
                MethodType.methodType(void.class, int.class),
                FunctionDescriptor.ofVoid(MemoryLayout.ofPaddingBits(32)),
                "Expected a ValueLayout"
            },
            {
                MethodType.methodType(void.class, boolean.class),
                FunctionDescriptor.ofVoid(MemoryLayouts.BITS_8_LE),
                "Unsupported carrier"
            },
            {
                MethodType.methodType(void.class, int.class),
                FunctionDescriptor.ofVoid(MemoryLayouts.BITS_64_LE),
                "Carrier size mismatch"
            },
            {
                MethodType.methodType(void.class, MemoryAddress.class),
                FunctionDescriptor.ofVoid(MemoryLayout.ofPaddingBits(64)),
                "Expected a ValueLayout"
            },
            {
                MethodType.methodType(void.class, MemoryAddress.class),
                FunctionDescriptor.ofVoid(MemoryLayouts.BITS_16_LE),
                "Address size mismatch"
            },
            {
                MethodType.methodType(void.class, MemorySegment.class),
                FunctionDescriptor.ofVoid(MemoryLayouts.BITS_64_LE),
                "Expected a GroupLayout"
            },
            {
                MethodType.methodType(void.class, String.class),
                FunctionDescriptor.ofVoid(MemoryLayouts.BITS_64_LE),
                "Unsupported carrier"
            },
        };
    }

}