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23 
24 /*
25  * @test ConfigFileParsing
26  * @bug 7158804
27  * @summary Improve config file parsing
28  * @library /test/lib
29  * @modules java.base/jdk.internal.misc
30  *          java.management
31  */
32 
33 import java.io.PrintWriter;
34 import jdk.test.lib.process.ProcessTools;
35 import jdk.test.lib.process.OutputAnalyzer;
36 
37 public class ConfigFileParsing {
main(String[] args)38   public static void main(String[] args) throws Exception {
39     String testFileName = ".hotspotrc";
40 
41     // Create really long invalid option
42     String reallyLongInvalidOption = "";
43     for (int i=0; i<5000; i++)
44       reallyLongInvalidOption+='a';
45 
46     // Populate the options file with really long string
47     PrintWriter pw = new PrintWriter(testFileName);
48     pw.println("-XX:+" + reallyLongInvalidOption);
49     pw.close();
50 
51     // start VM
52     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
53         "-XX:+IgnoreUnrecognizedVMOptions", "-XX:Flags=.hotspotrc", "-version");
54 
55     OutputAnalyzer output = new OutputAnalyzer(pb.start());
56     output.shouldHaveExitValue(0);
57   }
58 }
59