test/hotspot/jtreg/compiler/intrinsics/TestReferenceGetWithNull.java

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/**
* @test
* @bug 8310126
* @summary Test that the Reference::get intrinsic works with a null argument.
* @run main/othervm -XX:TieredStopAtLevel=1 -XX:CompileCommand=compileonly,*TestReferenceGetWithNull::test -Xbatch
*                   compiler.intrinsics.TestReferenceGetWithNull
*/

package compiler.intrinsics;

import java.lang.ref.WeakReference;

public class TestReferenceGetWithNull {

    // Declare final such that static binding at the call site is possible
    static final class MyReference<T> extends WeakReference<T> {
        public MyReference(T referent) {
            super(referent);
        }
    }

    static void test(MyReference r) {
        try {
            r.get();
        } catch (Exception e) {
            // Ignore
        }
    }

    public static void main(String[] args) {
        // Make sure MyReference is loaded
        MyReference<String[]> obj = new MyReference<>(args);
        // Trigger compilation
        for (int i = 0; i < 50_000; ++i) {
            test(null);
        }
    }
}