//export Add
func Add(x int) {
	defer func() {
		recover()
	}()
	sum.Lock()
	sum.i += x
	sum.Unlock()
	var p *int
	*p = 2
}

//export goDummy
func goDummy() {
}

func testCthread(t *testing.T) {
	if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && runtime.GOARCH == "arm64" {
		t.Skip("the iOS exec wrapper is unable to properly handle the panic from Add")
	}
	sum.i = 0
	C.doAdd(10, 6)

import java.util.concurrent.TimeoutException;
import junit.framework.AssertionFailedError;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A helper for concurrency testing. One or more {@code TestThread} instances are instantiated in a
 * test with reference to the same "lock-like object", and then their interactions with that object
 * are choreographed via the various methods on this class.
 *

import java.util.concurrent.TimeoutException;
import junit.framework.AssertionFailedError;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A helper for concurrency testing. One or more {@code TestThread} instances are instantiated in a
 * test with reference to the same "lock-like object", and then their interactions with that object
 * are choreographed via the various methods on this class.
 *

            void execute(Runnable runnable) {
                startThread(runnable)
            }
        }
    }

    TestThread startThread(Runnable cl) {
        lock.lock()
        try {
            TestThread thread = new TestThread(this, lock, cl)
            thread.start()
            return thread
        } finally {
            lock.unlock()
        }
    }

    /**