ConfigFileParsing.java

/*
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/*
 * @test ConfigFileParsing
 * @bug 7158804
 * @summary Improve config file parsing
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 */

import java.io.PrintWriter;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;

public class ConfigFileParsing {
  public static void main(String[] args) throws Exception {
    String testFileName = ".hotspotrc";

    // Create really long invalid option
    String reallyLongInvalidOption = "";
    for (int i=0; i<5000; i++)
      reallyLongInvalidOption+='a';

    // Populate the options file with really long string
    PrintWriter pw = new PrintWriter(testFileName);
    pw.println("-XX:+" + reallyLongInvalidOption);
    pw.close();

    // start VM
    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
        "-XX:+IgnoreUnrecognizedVMOptions", "-XX:Flags=.hotspotrc", "-version");

    OutputAnalyzer output = new OutputAnalyzer(pb.start());
    output.shouldHaveExitValue(0);
  }
}