SafeFunctionAccessTest.java

/*
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 *  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
 * @run testng/othervm --enable-native-access=ALL-UNNAMED SafeFunctionAccessTest
 */

import jdk.incubator.foreign.CLinker;
import jdk.incubator.foreign.FunctionDescriptor;
import jdk.incubator.foreign.SymbolLookup;
import jdk.incubator.foreign.MemoryAddress;
import jdk.incubator.foreign.MemoryLayout;
import jdk.incubator.foreign.MemorySegment;
import jdk.incubator.foreign.ResourceScope;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;

import org.testng.annotations.*;
import static org.testng.Assert.*;

public class SafeFunctionAccessTest {
    static {
        System.loadLibrary("SafeAccess");
    }

    static MemoryLayout POINT = MemoryLayout.structLayout(
            CLinker.C_INT, CLinker.C_INT
    );

    static final SymbolLookup LOOKUP = SymbolLookup.loaderLookup();

    @Test(expectedExceptions = IllegalStateException.class)
    public void testClosedStruct() throws Throwable {
        MemorySegment segment;
        try (ResourceScope scope = ResourceScope.newConfinedScope()) {
            segment = MemorySegment.allocateNative(POINT, scope);
        }
        assertFalse(segment.scope().isAlive());
        MethodHandle handle = CLinker.getInstance().downcallHandle(
                LOOKUP.lookup("struct_func").get(),
                MethodType.methodType(void.class, MemorySegment.class),
                FunctionDescriptor.ofVoid(POINT));

        handle.invokeExact(segment);
    }

    @Test(expectedExceptions = IllegalStateException.class)
    public void testClosedPointer() throws Throwable {
        MemoryAddress address;
        try (ResourceScope scope = ResourceScope.newConfinedScope()) {
            address = MemorySegment.allocateNative(POINT, scope).address();
        }
        assertFalse(address.scope().isAlive());
        MethodHandle handle = CLinker.getInstance().downcallHandle(
                LOOKUP.lookup("addr_func").get(),
                MethodType.methodType(void.class, MemoryAddress.class),
                FunctionDescriptor.ofVoid(CLinker.C_POINTER));

        handle.invokeExact(address);
    }
}