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.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8022865
  27  * @summary Tests for the -XX:CompressedClassSpaceSize command line option
  28  * @requires vm.opt.final.UseCompressedClassPointers
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @run main CompressedClassSpaceSize
  33  */
  34 import jdk.test.lib.Platform;
  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         if (Platform.is64bit()) {
  44             // Minimum size is 1MB
  45             pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=0",
  46                                                        "-version");
  47             output = new OutputAnalyzer(pb.start());
  48             output.shouldContain("outside the allowed range")
  49                   .shouldHaveExitValue(1);
  50 
  51             // Invalid size of -1 should be handled correctly
  52             pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=-1",
  53                                                        "-version");
  54             output = new OutputAnalyzer(pb.start());
  55             output.shouldContain("Improperly specified VM option 'CompressedClassSpaceSize=-1'")
  56                   .shouldHaveExitValue(1);
  57 
  58 
  59             // Maximum size is 3GB
  60             pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=4g",
  61                                                        "-version");
  62             output = new OutputAnalyzer(pb.start());
  63             output.shouldContain("outside the allowed range")
  64                   .shouldHaveExitValue(1);
  65 
  66 
  67             // Make sure the minimum size is set correctly and printed
  68             pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
  69                                                        "-XX:CompressedClassSpaceSize=1m",
  70                                                        "-Xlog:gc+metaspace=trace",
  71                                                        "-version");
  72             output = new OutputAnalyzer(pb.start());
  73             output.shouldContain("Compressed class space size: 1048576")
  74                   .shouldHaveExitValue(0);
  75 
  76 
  77             // Make sure the maximum size is set correctly and printed
  78             pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
  79                                                        "-XX:CompressedClassSpaceSize=3g",
  80                                                        "-Xlog:gc+metaspace=trace",
  81                                                        "-version");
  82             output = new OutputAnalyzer(pb.start());
  83             output.shouldContain("Compressed class space size: 3221225472")
  84                   .shouldHaveExitValue(0);
  85 
  86 
  87             pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedOops",
  88                                                        "-XX:CompressedClassSpaceSize=1m",
  89                                                        "-version");
  90             output = new OutputAnalyzer(pb.start());
  91             output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
  92                   .shouldHaveExitValue(0);
  93 
  94 
  95             pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedClassPointers",
  96                                                        "-XX:CompressedClassSpaceSize=1m",
  97                                                        "-version");
  98             output = new OutputAnalyzer(pb.start());
  99             output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
 100                   .shouldHaveExitValue(0);
 101         } else {
 102             // 32bit platforms doesn't have compressed oops
 103             pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=1m",
 104                                                        "-version");
 105             output = new OutputAnalyzer(pb.start());
 106             output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
 107                   .shouldHaveExitValue(0);
 108         }
 109     }
 110 }
--- EOF ---