| /* |
| * Copyright (c) 2014, 2016, 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 8022865 |
| * @summary Tests for the -XX:ObjectAlignmentInBytes command line option |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @run main ObjectAlignment |
| */ |
| |
| import jdk.test.lib.Platform; |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| |
| public class ObjectAlignment { |
| |
| public static void main(String[] args) throws Exception { |
| |
| if (Platform.is64bit()) { |
| // Minimum alignment should be 8 |
| testObjectAlignment(4) |
| .shouldContain("outside the allowed range") |
| .shouldHaveExitValue(1); |
| |
| // Alignment has to be a power of 2 |
| testObjectAlignment(9) |
| .shouldContain("must be power of 2") |
| .shouldHaveExitValue(1); |
| |
| testObjectAlignment(-1) |
| .shouldContain("outside the allowed range") |
| .shouldHaveExitValue(1); |
| |
| // Maximum alignment allowed is 256 |
| testObjectAlignment(512) |
| .shouldContain("outside the allowed range") |
| .shouldHaveExitValue(1); |
| |
| // Valid alignments should work |
| testObjectAlignment(8).shouldHaveExitValue(0); |
| testObjectAlignment(16).shouldHaveExitValue(0); |
| testObjectAlignment(256).shouldHaveExitValue(0); |
| |
| } else { |
| // For a 32bit JVM the option isn't there, make sure it's not silently ignored |
| testObjectAlignment(8) |
| .shouldContain("Unrecognized VM option 'ObjectAlignmentInBytes=8'") |
| .shouldHaveExitValue(1); |
| } |
| } |
| |
| private static OutputAnalyzer testObjectAlignment(int alignment) throws Exception { |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:ObjectAlignmentInBytes=" + alignment, |
| "-version"); |
| return new OutputAnalyzer(pb.start()); |
| } |
| } |