118 lines
3.6 KiB
Java
118 lines
3.6 KiB
Java
/*
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* Copyright (c) 2017, 2019, 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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/*
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* @test
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* @summary Unused metadata created during dump time should be freed from the CDS archive.
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* @requires vm.cds
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* @library /test/lib
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* @compile test-classes/MethodNoReturn.jasm test-classes/Hello.java
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* @run driver FreeUnusedMetadata
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*/
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import jdk.test.lib.process.OutputAnalyzer;
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public class FreeUnusedMetadata {
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static byte iconst_1 = 4;
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static byte pop = 87;
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static byte[] pattern = { // This has the same sequence as in test-classes/MethodNoReturn.jasm
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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pop,
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iconst_1,
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iconst_1,
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iconst_1,
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iconst_1,
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iconst_1,
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iconst_1,
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iconst_1,
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iconst_1,
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pop,
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pop,
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pop,
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pop,
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pop,
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pop,
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pop,
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pop
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};
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public static void main(String[] args) throws Exception {
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String[] ARCHIVE_CLASSES = {"Hello", "MethodNoReturn"};
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String appJar = JarBuilder.build("FreeUnusedMetadata", ARCHIVE_CLASSES);
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OutputAnalyzer dumpOutput = TestCommon.dump(
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appJar, ARCHIVE_CLASSES);
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TestCommon.checkDump(dumpOutput, "Loading classes to share");
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OutputAnalyzer execOutput = TestCommon.exec(appJar, "Hello");
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TestCommon.checkExec(execOutput, "Hello World");
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String archive = TestCommon.getCurrentArchiveName();
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System.out.println("Checking for pattern inside " + archive + "...");
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byte[] data = Files.readAllBytes(Paths.get(archive));
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int max = data.length - pattern.length;
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for (int i=0; i<max; i++) {
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if (data[i+0] == iconst_1 && data[i+1] == pop &&
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data[i+2] == iconst_1 && data[i+3] == pop) {
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boolean match = true;
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for (int x=4; x<pattern.length; x++) {
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if (data[i+x] != pattern[x]) {
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match = false;
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break;
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}
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}
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if (match) {
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throw new RuntimeException("method of unverifiable class should have been " +
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"removed from the archive " + archive +
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" , but was found at offset " + i);
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}
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}
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}
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System.out.println("Not found: method from unverifiable class has been removed");
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}
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}
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