1/*
2 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test CompressedClassSpaceSizeInJmapHeap
26 * @bug 8004924
27 * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 *          java.management
31 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap
32 */
33
34import jdk.test.lib.JDKToolLauncher;
35import jdk.test.lib.Platform;
36import jdk.test.lib.process.OutputAnalyzer;
37import jdk.test.lib.process.ProcessTools;
38import java.nio.file.*;
39import java.io.File;
40import java.nio.charset.Charset;
41import java.util.List;
42
43public class CompressedClassSpaceSizeInJmapHeap {
44    // Note that on some platforms it may require root privileges to run this test.
45    public static void main(String[] args) throws Exception {
46        if (!Platform.is64bit()) {
47            // Compressed Class Space is only available on 64-bit JVMs
48            return;
49        }
50        if (!Platform.shouldSAAttach()) {
51            System.out.println("SA attach not expected to work - test skipped.");
52            return;
53        }
54
55        String pid = Long.toString(ProcessTools.getProcessId());
56
57        JDKToolLauncher jmap = JDKToolLauncher.create("jhsdb")
58                                              .addToolArg("jmap")
59                                              .addToolArg("--heap")
60                                              .addToolArg("--pid")
61                                              .addToolArg(pid);
62        ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
63
64        File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
65        pb.redirectOutput(out);
66
67        File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
68        pb.redirectError(err);
69
70        run(pb);
71
72        OutputAnalyzer output = new OutputAnalyzer(read(out));
73        output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
74        out.delete();
75    }
76
77    private static void run(ProcessBuilder pb) throws Exception {
78        Process p = pb.start();
79        p.waitFor();
80        int exitValue = p.exitValue();
81        if (exitValue != 0) {
82            throw new Exception("jmap -heap exited with error code: " + exitValue);
83        }
84    }
85
86    private static String read(File f) throws Exception {
87        Path p = f.toPath();
88        List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
89
90        StringBuilder sb = new StringBuilder();
91        for (String line : lines) {
92            sb.append(line).append('\n');
93        }
94        return sb.toString();
95    }
96}
97