95 lines
3.7 KiB
Java
95 lines
3.7 KiB
Java
/*
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* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test CdsSameObjectAlignment
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* @summary Testing CDS (class data sharing) using varying object alignment.
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* Using same object alignment for each dump/load pair
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* @library /testlibrary
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* @modules java.base/jdk.internal.misc
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* java.management
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*/
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import jdk.test.lib.*;
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public class CdsSameObjectAlignment {
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public static void main(String[] args) throws Exception {
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String nativeWordSize = System.getProperty("sun.arch.data.model");
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if (!Platform.is64bit()) {
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System.out.println("ObjectAlignmentInBytes for CDS is only " +
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"supported on 64bit platforms; this plaform is " +
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nativeWordSize);
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System.out.println("Skipping the test");
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} else {
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dumpAndLoadSharedArchive(8);
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dumpAndLoadSharedArchive(16);
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dumpAndLoadSharedArchive(32);
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dumpAndLoadSharedArchive(64);
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}
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}
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private static void
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dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
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String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
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+ objectAlignmentInBytes;
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System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
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+ objectAlignmentInBytes);
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String filename = "./CdsSameObjectAlignment" + objectAlignmentInBytes + ".jsa";
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// create shared archive
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=" + filename,
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"-Xshare:dump",
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objectAlignmentArg);
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldContain("Loading classes to share");
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output.shouldHaveExitValue(0);
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// run using the shared archive
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pb = ProcessTools.createJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=" + filename,
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"-Xshare:on",
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objectAlignmentArg,
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"-version");
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output = new OutputAnalyzer(pb.start());
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try {
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output.shouldContain("sharing");
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output.shouldHaveExitValue(0);
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} catch (RuntimeException e) {
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// CDS uses absolute addresses for performance.
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// It will try to reserve memory at a specific address;
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// there is a chance such reservation will fail
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// If it does, it is NOT considered a failure of the feature,
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// rather a possible expected outcome, though not likely
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output.shouldContain("Unable to use shared archive");
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output.shouldHaveExitValue(1);
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}
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}
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}
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