IVTest.java

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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/**
 * @test
 * @bug 6663621
 * @summary JVM crashes while trying to execute api/java_security/Signature/SignatureTests.html#initSign tests.
 */

public class IVTest {
    static int paddedSize;

    static void padV15(byte[] padded) {
        int psSize = padded.length;
        int k = 0;
        while (psSize-- > 0) {
            padded[k++] = (byte)0xff;
        }
    }

    static void padV15_2(int paddedSize) {
        byte[] padded = new byte[paddedSize];
        int psSize = padded.length;
        int k = 0;
        while (psSize-- > 0) {
            padded[k++] = (byte)0xff;
        }
    }

    static void padV15_3() {
        byte[] padded = new byte[paddedSize];
        int psSize = padded.length;
        int k = 0;
        while (psSize-- > 0) {
            padded[k++] = (byte)0xff;
        }
    }

    static void padV15_4() {
        byte[] padded = new byte[paddedSize];
        int psSize = padded.length;
        for (int k = 0;psSize > 0; psSize--) {
            int i = padded.length - psSize;
            padded[i] = (byte)0xff;
        }
    }

    static void padV15_5() {
        byte[] padded = new byte[paddedSize];
        int psSize = padded.length;
        int k = psSize - 1;
        for (int i = 0; i < psSize; i++) {
            padded[k--] = (byte)0xff;
        }
    }

    public static void main(String argv[]) {
        int bounds = 1024;
        int lim = 500000;
        long start = System.currentTimeMillis();
        for (int j = 0; j < lim; j++) {
            paddedSize = j % bounds;
            padV15(new byte[paddedSize]);
        }
        long end = System.currentTimeMillis();
        System.out.println(end - start);
        start = System.currentTimeMillis();
        for (int j = 0; j < lim; j++) {
            paddedSize = j % bounds;
            padV15_2(paddedSize);
        }
        end = System.currentTimeMillis();
        System.out.println(end - start);
        start = System.currentTimeMillis();
        for (int j = 0; j < lim; j++) {
            paddedSize = j % bounds;
            padV15_3();
        }
        end = System.currentTimeMillis();
        System.out.println(end - start);
        start = System.currentTimeMillis();
        for (int j = 0; j < lim; j++) {
            paddedSize = j % bounds;
            padV15_4();
        }
        end = System.currentTimeMillis();
        System.out.println(end - start);
        start = System.currentTimeMillis();
        for (int j = 0; j < lim; j++) {
            paddedSize = j % bounds;
            padV15_5();
        }
        end = System.currentTimeMillis();
        System.out.println(end - start);
    }
}