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/*
* Copyright (c) 2013, 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 CdsSameObjectAlignment
* @summary Testing CDS (class data sharing) using varying object alignment.
* Using same object alignment for each dump/load pair
* @library /testlibrary
*/
import com.oracle.java.testlibrary.*;
public class CdsSameObjectAlignment {
public static void main(String[] args) throws Exception {
String nativeWordSize = System.getProperty("sun.arch.data.model");
if (!Platform.is64bit()) {
System.out.println("ObjectAlignmentInBytes for CDS is only " +
"supported on 64bit platforms; this plaform is " +
nativeWordSize);
System.out.println("Skipping the test");
} else {
dumpAndLoadSharedArchive(8);
dumpAndLoadSharedArchive(16);
dumpAndLoadSharedArchive(32);
dumpAndLoadSharedArchive(64);
}
}
private static void
dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
+ objectAlignmentInBytes;
System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
+ objectAlignmentInBytes);
// create shared archive
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
"-XX:+UnlockDiagnosticVMOptions",
"-XX:SharedArchiveFile=./sample.jsa",
"-Xshare:dump",
objectAlignmentArg);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldContain("Loading classes to share");
output.shouldHaveExitValue(0);
// run using the shared archive
pb = ProcessTools.createJavaProcessBuilder(
"-XX:+UnlockDiagnosticVMOptions",
"-XX:SharedArchiveFile=./sample.jsa",
"-Xshare:on",
objectAlignmentArg,
"-version");
output = new OutputAnalyzer(pb.start());
try {
output.shouldContain("sharing");
output.shouldHaveExitValue(0);
} catch (RuntimeException e) {
// CDS uses absolute addresses for performance.
// It will try to reserve memory at a specific address;
// there is a chance such reservation will fail
// If it does, it is NOT considered a failure of the feature,
// rather a possible expected outcome, though not likely
output.shouldContain(
"Unable to reserve shared space at required address");
output.shouldHaveExitValue(1);
}
}
}
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