--- /dev/null 2017-05-05 06:40:48.273288351 -0700 +++ new/test/hotspot/jtreg/runtime/appcds/FreeUnusedMetadata.java 2017-11-27 12:11:23.139628774 -0800 @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2017, 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 + * @summary Unused metadata created during dump time should be freed from the CDS archive. + * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) + * @library /test/lib + * @modules jdk.jartool/sun.tools.jar + * @compile test-classes/MethodNoReturn.jasm test-classes/Hello.java + * @run main FreeUnusedMetadata + */ + +import java.nio.file.Files; +import java.nio.file.Paths; +import jdk.test.lib.process.OutputAnalyzer; + +public class FreeUnusedMetadata { + static byte iconst_1 = 4; + static byte pop = 87; + static byte[] pattern = { // This has the same sequence as in test-classes/MethodNoReturn.jasm + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + pop, + iconst_1, + iconst_1, + iconst_1, + iconst_1, + iconst_1, + iconst_1, + iconst_1, + iconst_1, + pop, + pop, + pop, + pop, + pop, + pop, + pop, + pop + }; + + public static void main(String[] args) throws Exception { + String[] ARCHIVE_CLASSES = {"Hello", "MethodNoReturn"}; + String appJar = JarBuilder.build("FreeUnusedMetadata", ARCHIVE_CLASSES); + + OutputAnalyzer dumpOutput = TestCommon.dump( + appJar, ARCHIVE_CLASSES); + TestCommon.checkDump(dumpOutput, "Loading classes to share"); + + OutputAnalyzer execOutput = TestCommon.exec(appJar, "Hello"); + TestCommon.checkExec(execOutput, "Hello World"); + + + String archive = TestCommon.getCurrentArchiveName(); + System.out.println("Checking for pattern inside " + archive + "..."); + + byte[] data = Files.readAllBytes(Paths.get(archive)); + int max = data.length - pattern.length; + for (int i=0; i