| /* |
| * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /** |
| * @test |
| * @bug 6663621 |
| * @summary JVM crashes while trying to execute api/java_security/Signature/SignatureTests.html#initSign tests. |
| * |
| * @run main compiler.c2.IVTest |
| */ |
| |
| package compiler.c2; |
| |
| 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); |
| } |
| } |