1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8022865 27 * @summary Tests for the -XX:ObjectAlignmentInBytes command line option 28 * @library /testlibrary 29 * @build com.oracle.java.testlibrary.* 30 * @run main ObjectAlignment 31 */ 32 import com.oracle.java.testlibrary.*; 33 34 public class ObjectAlignment { 35 36 public static void main(String[] args) throws Exception { 37 38 if (Platform.is64bit()) { 39 // Minimum alignment should be 8 40 testObjectAlignment(4) 41 .shouldContain("error: ObjectAlignmentInBytes=4 must be greater or equal 8") 42 .shouldHaveExitValue(1); 43 44 // Alignment has to be a power of 2 45 testObjectAlignment(9) 46 .shouldContain("error: ObjectAlignmentInBytes=9 must be power of 2") 47 .shouldHaveExitValue(1); 48 49 testObjectAlignment(-1) 50 .shouldContain("error: ObjectAlignmentInBytes=-1 must be power of 2") 51 .shouldHaveExitValue(1); 52 53 // Maximum alignment allowed is 256 54 testObjectAlignment(512) 55 .shouldContain("error: ObjectAlignmentInBytes=512 must not be greater than 256") 56 .shouldHaveExitValue(1); 57 58 // Valid alignments should work 59 testObjectAlignment(8).shouldHaveExitValue(0); 60 testObjectAlignment(16).shouldHaveExitValue(0); 61 testObjectAlignment(256).shouldHaveExitValue(0); 62 63 } else { 64 // For a 32bit JVM the option isn't there, make sure it's not silently ignored 65 testObjectAlignment(8) 66 .shouldContain("Unrecognized VM option 'ObjectAlignmentInBytes=8'") 67 .shouldHaveExitValue(1); 68 } 69 } 70 71 private static OutputAnalyzer testObjectAlignment(int alignment) throws Exception { 72 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:ObjectAlignmentInBytes=" + alignment, 73 "-version"); 74 return new OutputAnalyzer(pb.start()); 75 } 76 }