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/*
* Copyright (c) 2014, 2023, 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
* @requires vm.flagless
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @run driver 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.createLimitedTestJavaProcessBuilder("-XX:ObjectAlignmentInBytes=" + alignment,
"-version");
return new OutputAnalyzer(pb.start());
}
}
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