jdk-24/hotspot/test/runtime/CommandLine/ObsoleteFlagErrorMessage.java

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/*
 * @test
 * @bug 8060449 8073989
 * @summary Newly obsolete command line options should still give useful error messages when used improperly.
 * @library /testlibrary
 */

import jdk.test.lib.*;

public class ObsoleteFlagErrorMessage {
  public static void main(String[] args) throws Exception {

    // Case 1: Newly obsolete flags with extra junk appended should not be treated as newly obsolete (8060449)
    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
        "-XX:UseOldInliningPlusJunk", "-version");

    OutputAnalyzer output = new OutputAnalyzer(pb.start());
    output.shouldContain("Unrecognized VM option 'UseOldInliningPlusJunk'"); // Must identify bad option.
    output.shouldHaveExitValue(1);

    // Case 2: Newly obsolete integer-valued flags should be recognized as newly obsolete (8073989)
    ProcessBuilder pb2 = ProcessTools.createJavaProcessBuilder(
        "-XX:NmethodSweepFraction=10", "-version");

    OutputAnalyzer output2 = new OutputAnalyzer(pb2.start());
    output2.shouldContain("Ignoring option").shouldContain("support was removed");
    output2.shouldContain("NmethodSweepFraction");
  }
}