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.shouldMatch("Compressed class space.*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.shouldMatch("Compressed class space.*3221225472")
  83               .shouldHaveExitValue(0);
  84 
  85 
  86         pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedClassPointers",
  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     }

  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 shall be rounded up to the minimum size of 4m since metaspace reservations
  68         //  are done in a 4m granularity. 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.*4194304")
  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 
  88         pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedClassPointers",
  89                                                    "-XX:CompressedClassSpaceSize=1m",
  90                                                    "-version");
  91         output = new OutputAnalyzer(pb.start());
  92         output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")
  93               .shouldHaveExitValue(0);
  94     }