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/*
* Copyright (c) 2013, 2022, 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.
*/
package gc.metaspace;
/**
* @test CompressedClassSpaceSizeInJmapHeap
* @bug 8004924
* @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
* @requires vm.hasSA
* @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @run main/timeout=240 gc.metaspace.CompressedClassSpaceSizeInJmapHeap
*/
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.Platform;
import jdk.test.lib.apps.LingeredApp;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.SA.SATestUtils;
import java.nio.file.*;
import java.io.File;
import java.nio.charset.Charset;
import java.util.List;
public class CompressedClassSpaceSizeInJmapHeap {
// Note that on some platforms it may require root privileges to run this test.
public static void main(String[] args) throws Exception {
SATestUtils.skipIfCannotAttach(); // throws SkippedException if attach not expected to work.
if (!Platform.is64bit()) {
// Compressed Class Space is only available on 64-bit JVMs
return;
}
LingeredApp theApp = new LingeredApp();
LingeredApp.startApp(List.of("-XX:CompressedClassSpaceSize=50m"), theApp);
String pid = Long.toString(theApp.getPid());
JDKToolLauncher jmap = JDKToolLauncher.create("jhsdb")
.addToolArg("jmap")
.addToolArg("--heap")
.addToolArg("--pid")
.addToolArg(pid);
ProcessBuilder pb = SATestUtils.createProcessBuilder(jmap);
File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
pb.redirectOutput(out);
File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
pb.redirectError(err);
run(pb);
OutputAnalyzer output = new OutputAnalyzer(read(out));
output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
out.delete();
LingeredApp.stopApp(theApp);
}
private static void run(ProcessBuilder pb) throws Exception {
Process p = pb.start();
p.waitFor();
int exitValue = p.exitValue();
if (exitValue != 0) {
throw new Exception("jmap -heap exited with error code: " + exitValue);
}
}
private static String read(File f) throws Exception {
Path p = f.toPath();
List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
StringBuilder sb = new StringBuilder();
for (String line : lines) {
sb.append(line).append('\n');
}
return sb.toString();
}
}
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