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23 
24 package gc.arguments;
25 
26 /*
27  * @test TestG1PercentageOptions
28  * @key gc
29  * @bug 8068942
30  * @requires vm.gc.G1
31  * @summary Test argument processing of various percentage options
32  * @library /test/lib
33  * @library /
34  * @modules java.base/jdk.internal.misc
35  *          java.management
36  * @run driver gc.arguments.TestG1PercentageOptions
37  */
38 
39 import jdk.test.lib.process.OutputAnalyzer;
40 import jdk.test.lib.process.ProcessTools;
41 
42 public class TestG1PercentageOptions {
43 
44     private static final class OptionDescription {
45         public final String name;
46         public final String[] valid;
47         public final String[] invalid;
48 
OptionDescription(String name_, String[] valid_, String[] invalid_)49         OptionDescription(String name_, String[] valid_, String[] invalid_) {
50             name = name_;
51             valid = valid_;
52             invalid = invalid_;
53         }
54     }
55 
56     private static final String[] defaultValid = new String[] {
57         "0", "1", "50", "95", "100" };
58     private static final String[] defaultInvalid = new String[] {
59         "-10", "110", "bad" };
60 
61     // All of the G1 product arguments that are percentages.
62     private static final OptionDescription[] percentOptions = new OptionDescription[] {
63         new OptionDescription("G1ConfidencePercent", defaultValid, defaultInvalid)
64         // Other percentage options are not yet validated by argument processing.
65     };
66 
check(String flag, boolean is_valid)67     private static void check(String flag, boolean is_valid) throws Exception {
68         String[] flags = new String[] { "-XX:+UseG1GC", flag, "-version" };
69         ProcessBuilder pb = GCArguments.createJavaProcessBuilder(flags);
70         OutputAnalyzer output = new OutputAnalyzer(pb.start());
71         if (is_valid) {
72             output.shouldHaveExitValue(0);
73         } else {
74             output.shouldHaveExitValue(1);
75         }
76     }
77 
78     private static
check(String name, String value, boolean is_valid)79     void check(String name, String value, boolean is_valid) throws Exception {
80         check("-XX:" + name + "=" + value, is_valid);
81     }
82 
main(String args[])83     public static void main(String args[]) throws Exception {
84         for (OptionDescription option : percentOptions) {
85             for (String value : option.valid) {
86                 check(option.name, value, true);
87             }
88             for (String value : option.invalid) {
89                 check(option.name, value, false);
90             }
91             check("-XX:" + option.name, false);
92             check("-XX:+" + option.name, false);
93             check("-XX:-" + option.name, false);
94         }
95     }
96 }
97