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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * under the terms of the GNU General Public License version 2 only, as
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 *
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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 jdk.foreign.linker != "FALLBACK"
 * @requires (os.arch == "aarch64" | os.arch=="riscv64") & os.name == "Linux"
 * @requires os.maxMemory > 4G
 * @requires vm.compMode != "Xcomp"
 * @modules java.base/jdk.internal.foreign
 * @build NativeTestHelper CallGeneratorHelper TestUpcallBase
 * @bug 8337753
 *
 * @run testng/native/othervm/timeout=3200
 *   -Xcheck:jni
 *   -XX:+IgnoreUnrecognizedVMOptions
 *   -XX:-VerifyDependencies
 *   --enable-native-access=ALL-UNNAMED
 *   -Dgenerator.sample.factor=17
 *   TestUpcallStress
 */

import java.lang.foreign.Arena;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;

import org.testng.annotations.Test;

import java.lang.invoke.MethodHandle;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.*;
import java.util.function.Consumer;

public class TestUpcallStress extends TestUpcallBase {

    static {
        System.loadLibrary("TestUpcall");
    }

    @Test(dataProvider="functions", dataProviderClass=CallGeneratorHelper.class)
    public void testUpcallsStress(int count, String fName, Ret ret, List<ParamType> paramTypes,
                                  List<StructFieldType> fields) throws Throwable {
        ExecutorService executor = Executors.newFixedThreadPool(16);
        for (int threadIdx = 0; threadIdx < 16; threadIdx++) {
            executor.submit(() -> {
                for (int iter = 0; iter < 10000; iter++) {
                    List<Consumer<Object>> returnChecks = new ArrayList<>();
                    List<Consumer<Object>> argChecks = new ArrayList<>();
                    MemorySegment addr = findNativeOrThrow(fName);
                    try (Arena arena = Arena.ofConfined()) {
                        FunctionDescriptor descriptor = function(ret, paramTypes, fields);
                        MethodHandle mh = downcallHandle(LINKER, addr, arena, descriptor);
                        AtomicReference<Object[]> capturedArgs = new AtomicReference<>();
                        Object[] args = makeArgs(capturedArgs, arena, descriptor, returnChecks, argChecks, 0);

                        Object res = mh.invokeWithArguments(args);

                        if (ret == Ret.NON_VOID) {
                            returnChecks.forEach(c -> c.accept(res));
                        }

                        Object[] capturedArgsArr = capturedArgs.get();
                        for (int i = 0; i < capturedArgsArr.length; i++) {
                            argChecks.get(i).accept(capturedArgsArr[i]);
                        }
                    } catch (Throwable ex) {
                        throw new AssertionError(ex);
                    }
                }
            });
        }
        // This shutdownNow is 'wrong', since it doesn't wait for tasks to terminate,
        // but it seems to be the only way to reproduce the race of JDK-8337753
        executor.shutdownNow();
    }
}