1 /*
   2  * Copyright (c) 2014, 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.
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  23 
  24 /*
  25  * @test
  26  * @bug 8022865
  27  * @summary Tests for the -XX:CompressedClassSpaceSize command line option
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @run main CompressedClassSpaceSize
  32  */
  33 import jdk.test.lib.Platform;
  34 import jdk.test.lib.process.ProcessTools;
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 
  37 public class CompressedClassSpaceSize {
  38 
  39     public static void main(String[] args) throws Exception {
  40         ProcessBuilder pb;
  41         OutputAnalyzer output;
  42         if (Platform.is64bit()) {
  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             pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
  68                                                        "-XX:CompressedClassSpaceSize=1m",
  69                                                        "-Xlog:gc+metaspace=trace",
  70                                                        "-version");
  71             output = new OutputAnalyzer(pb.start());
  72             output.shouldContain("Compressed class space size: 1048576")
  73                   .shouldHaveExitValue(0);
  74 
  75 
  76             // Make sure the maximum size is set correctly and printed
  77             pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
  78                                                        "-XX:CompressedClassSpaceSize=3g",
  79                                                        "-Xlog:gc+metaspace=trace",
  80                                                        "-version");
  81             output = new OutputAnalyzer(pb.start());
  82             output.shouldContain("Compressed class space size: 3221225472")
  83                   .shouldHaveExitValue(0);
  84 
  85 
  86             pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedOops",
  87                                                        "-XX:CompressedClassSpaceSize=1m",
  88                                                        "-version");
  89             output = new OutputAnalyzer(pb.start());
  90             output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
  91                   .shouldHaveExitValue(0);
  92 
  93 
  94             pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedClassPointers",
  95                                                        "-XX:CompressedClassSpaceSize=1m",
  96                                                        "-version");
  97             output = new OutputAnalyzer(pb.start());
  98             output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
  99                   .shouldHaveExitValue(0);
 100         } else {
 101             // 32bit platforms doesn't have compressed oops
 102             pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=1m",
 103                                                        "-version");
 104             output = new OutputAnalyzer(pb.start());
 105             output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
 106                   .shouldHaveExitValue(0);
 107         }
 108     }
 109 }