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23 
24 package gc.arguments;
25 
26 /*
27  * @test TestInitialTenuringThreshold
28  * @key gc
29  * @bug 8014765
30  * @requires vm.gc.Parallel
31  * @summary Tests argument processing for initial tenuring threshold
32  * @library /test/lib
33  * @library /
34  * @modules java.base/jdk.internal.misc
35  *          java.management
36  * @run main/othervm gc.arguments.TestInitialTenuringThreshold
37  * @author thomas.schatzl@oracle.com
38  */
39 
40 import jdk.test.lib.process.OutputAnalyzer;
41 import jdk.test.lib.process.ProcessTools;
42 
43 public class TestInitialTenuringThreshold {
44 
runWithThresholds(int initial, int max, boolean shouldfail)45   public static void runWithThresholds(int initial, int max, boolean shouldfail) throws Exception {
46     ProcessBuilder pb = GCArguments.createJavaProcessBuilder(
47       "-XX:+UseParallelGC",
48       "-XX:InitialTenuringThreshold=" + String.valueOf(initial),
49       "-XX:MaxTenuringThreshold=" + String.valueOf(max),
50       "-version"
51       );
52 
53     OutputAnalyzer output = new OutputAnalyzer(pb.start());
54     if (shouldfail) {
55       output.shouldHaveExitValue(1);
56     } else {
57       output.shouldHaveExitValue(0);
58     }
59   }
60 
61 
main(String args[])62   public static void main(String args[]) throws Exception {
63     ProcessBuilder pb = GCArguments.createJavaProcessBuilder(
64       // some value below the default value of InitialTenuringThreshold of 7
65       "-XX:MaxTenuringThreshold=1",
66       "-version"
67       );
68 
69     OutputAnalyzer output = new OutputAnalyzer(pb.start());
70     output.shouldHaveExitValue(0);
71     // successful tests
72     runWithThresholds(0, 10, false);
73     runWithThresholds(5, 5, false);
74     runWithThresholds(8, 16, false);
75     // failing tests
76     runWithThresholds(10, 0, true);
77     runWithThresholds(9, 8, true);
78     runWithThresholds(-1, 8, true);
79     runWithThresholds(0, -1, true);
80     runWithThresholds(8, -1, true);
81     runWithThresholds(16, 8, true);
82     runWithThresholds(8, 17, true);
83   }
84 }
85