test/jdk/java/foreign/TestStubAllocFailure.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @library ../ /test/lib
 * @requires jdk.foreign.linker != "FALLBACK"
 * @requires vm.compMode != "Xcomp"
 * @run testng/othervm/native
 *   --enable-native-access=ALL-UNNAMED
 *   TestStubAllocFailure
 */

import java.lang.foreign.*;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.io.IOException;
import java.util.List;
import java.util.function.Consumer;
import java.util.stream.Stream;

import org.testng.annotations.Test;

import static org.testng.Assert.fail;

public class TestStubAllocFailure extends UpcallTestHelper {

    @Test
    public void testUpcallAllocFailure() throws IOException, InterruptedException {
        runInNewProcess(UpcallRunner.class, true, List.of("-XX:ReservedCodeCacheSize=3M"), List.of())
                .shouldNotHaveExitValue(0)
                .shouldNotHaveFatalError();
    }

    @Test
    public void testUDowncallAllocFailure() throws IOException, InterruptedException {
        runInNewProcess(DowncallRunner.class, true, List.of("-XX:ReservedCodeCacheSize=3M"), List.of())
                .shouldNotHaveExitValue(0)
                .shouldNotHaveFatalError();
    }

    public static class UpcallRunner extends NativeTestHelper {
        public static void main(String[] args) throws Throwable {
            FunctionDescriptor descriptor = FunctionDescriptor.ofVoid();
            MethodHandle target = MethodHandles.lookup().findStatic(UpcallRunner.class, "target", descriptor.toMethodType());
            while (true) {
                LINKER.upcallStub(target, descriptor, Arena.ofAuto());
            }
        }

        public static void target() {
            fail("Should not get here");
        }
    }

    public static class DowncallRunner extends NativeTestHelper {

        private static final int MAX_ARITY = 5;

        private static void mapper(FunctionDescriptor fd, Consumer<FunctionDescriptor> sink) {
            for (MemoryLayout l : List.of(C_INT, C_LONG_LONG, C_DOUBLE, C_FLOAT, C_SHORT)) {
                sink.accept(fd.appendArgumentLayouts(l));
            }
        }

        public static void main(String[] args) throws Throwable {
            Linker linker = Linker.nativeLinker();
            Stream<FunctionDescriptor> stream = Stream.of(FunctionDescriptor.ofVoid());
            for (int i = 0; i < MAX_ARITY; i++) {
                stream = stream.mapMulti(DowncallRunner::mapper);
            }

            stream.forEach(linker::downcallHandle);
        }
    }
}