test/hotspot/jtreg/compiler/arraycopy/TestArrayCopyOverflowInBoundChecks.java

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/*
 * @test
 * @bug 8134468
 * @summary test that checks whether an array load falls into the range of an arraycopy is incorrect on 32bits
 *
 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
 *                    compiler.arraycopy.TestArrayCopyOverflowInBoundChecks
 */

package compiler.arraycopy;

public class TestArrayCopyOverflowInBoundChecks {

    static byte[] src_array = { 'a', 'b', 'c', 'd', 'e' };

    static byte test(int copy_len) {
        byte[] dst_array = new byte[10];
        System.arraycopy(src_array, 0, dst_array, 1, copy_len);
        return dst_array[1];
    }

    static public void main(String[] args) {
        for (int i = 0; i < 20000; i++) {
            if (test(src_array.length - 1) != src_array[0]) {
                throw new RuntimeException("Test failed");
            }
        }
    }
}