test/hotspot/jtreg/compiler/c1/TestNullArrayClone.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8302850
 * @summary Tests that an array clone call that has been compiled with C1
 *          handles null values correctly.
 * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:TieredStopAtLevel=1
 *                   -XX:CompileOnly=compiler.c1.TestNullArrayClone::testClone* -XX:+UnlockExperimentalVMOptions
 *                   compiler.c1.TestNullArrayClone
 */
package compiler.c1;

import java.util.concurrent.ThreadLocalRandom;

public class TestNullArrayClone {
    static final int ITER = 2000; // ~ Tier3CompileThreshold
    static final int ARRAY_SIZE = 999;

    public static void main(String[] args) {
        testInts();
        testLongs();
        testBytes();
    }

    private static void testInts() {
        final int[] arr = new int[ARRAY_SIZE];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = ThreadLocalRandom.current().nextInt();
        }

        for (int i = 0; i < ITER; i++) {
            int[] result = testClonePrimitiveInt(arr);
            if (result.length != arr.length) {
                throw new RuntimeException("Unexpected clone length: source array length " + arr.length + " != clone array length " + result.length);
            }
            for (int j = 0; j < arr.length; j++) {
                if (result[j] != arr[j]) {
                    throw new RuntimeException("Unexpected result: " + result[j] + " != " + j);
                }
            }
        }

        try {
            testClonePrimitiveInt(null);
            throw new RuntimeException("Expected NullPointerException to be thrown");
        } catch (NullPointerException e) {
        }
    }

    private static void testLongs() {
        final long[] arr = new long[ARRAY_SIZE];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = ThreadLocalRandom.current().nextLong();
        }

        for (int i = 0; i < ITER; i++) {
            long[] result = testClonePrimitiveLong(arr);
            if (result.length != arr.length) {
                throw new RuntimeException("Unexpected clone length: source array length " + arr.length + " != clone array length " + result.length);
            }
            for (int j = 0; j < arr.length; j++) {
                if (result[j] != arr[j]) {
                    throw new RuntimeException("Unexpected result: " + result[j] + " != " + j);
                }
            }
        }

        try {
            testClonePrimitiveLong(null);
            throw new RuntimeException("Expected NullPointerException to be thrown");
        } catch (NullPointerException e) {
        }
    }

    private static void testBytes() {
        final byte[] arr = new byte[ARRAY_SIZE];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = (byte) ThreadLocalRandom.current().nextInt();
        }

        for (int i = 0; i < ITER; i++) {
            byte[] result = testClonePrimitiveBytes(arr);
            if (result.length != arr.length) {
                throw new RuntimeException("Unexpected clone length: source array length " + arr.length + " != clone array length " + result.length);
            }
            for (int j = 0; j < arr.length; j++) {
                if (result[j] != arr[j]) {
                    throw new RuntimeException("Unexpected result: " + result[j] + " != " + j);
                }
            }
        }

        try {
            testClonePrimitiveBytes(null);
            throw new RuntimeException("Expected NullPointerException to be thrown");
        } catch (NullPointerException e) {
        }
    }

    static int[] testClonePrimitiveInt(int[] ints) {
        return ints.clone();
    }

    static long[] testClonePrimitiveLong(long[] longs) {
        return longs.clone();
    }

    static byte[] testClonePrimitiveBytes(byte[] bytes) {
        return bytes.clone();
    }
}