1 /*
2 * Copyright (c) 2014, 2020, 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
26 * @bug 8022865
27 * @summary Tests for the -XX:CompressedClassSpaceSize command line option
28 * @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true
29 * @library /test/lib
30 * @modules java.base/jdk.internal.misc
31 * java.management
32 * @run driver CompressedClassSpaceSize
33 */
34
35 import jdk.test.lib.process.ProcessTools;
36 import jdk.test.lib.process.OutputAnalyzer;
37
38 public class CompressedClassSpaceSize {
39
40 public static void main(String[] args) throws Exception {
41 ProcessBuilder pb;
42 OutputAnalyzer output;
43 // Minimum size is 1MB
44 pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=0",
45 "-version");
46 output = new OutputAnalyzer(pb.start());
47 output.shouldContain("outside the allowed range")
48 .shouldHaveExitValue(1);
49
50 // Invalid size of -1 should be handled correctly
51 pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=-1",
52 "-version");
53 output = new OutputAnalyzer(pb.start());
54 output.shouldContain("Improperly specified VM option 'CompressedClassSpaceSize=-1'")
55 .shouldHaveExitValue(1);
56
57
58 // Maximum size is 3GB
59 pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=4g",
60 "-version");
61 output = new OutputAnalyzer(pb.start());
62 output.shouldContain("outside the allowed range")
63 .shouldHaveExitValue(1);
64
65
66 // Make sure the minimum size is set correctly and printed
67 // (Note: ccs size are rounded up to the next larger root chunk boundary (16m).
68 // Note that this is **reserved** size and does not affect rss.
69 pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
70 "-XX:CompressedClassSpaceSize=1m",
71 "-Xlog:gc+metaspace=trace",
72 "-version");
73 output = new OutputAnalyzer(pb.start());
74 output.shouldMatch("Compressed class space.*16777216")
75 .shouldHaveExitValue(0);
76
77
78 // Make sure the maximum size is set correctly and printed
79 pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
80 "-XX:CompressedClassSpaceSize=3g",
81 "-Xlog:gc+metaspace=trace",
82 "-version");
83 output = new OutputAnalyzer(pb.start());
84 output.shouldMatch("Compressed class space.*3221225472")
85 .shouldHaveExitValue(0);
86 }
87 }
--- EOF ---