test/runtime/CommandLine/VMOptionWarning.java

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/*
 * @test
 * @bug 8027314
 * @summary Warn if diagnostic or experimental vm option is used and -XX:+UnlockDiagnosticVMOptions or -XX:+UnlockExperimentalVMOptions, respectively, isn't specified. Warn if develop or notproduct vm option is used with product version of VM.
 * @library /testlibrary
 */

import com.oracle.java.testlibrary.*;

public class VMOptionWarning {
    public static void main(String[] args) throws Exception {
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PredictedLoadedClassCount", "-version");
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldContain("Error: VM option 'PredictedLoadedClassCount' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.");

        if (Platform.isDebugBuild()) {
            System.out.println("Skip the rest of the tests on debug builds since diagnostic, develop, and notproduct options are available on debug builds.");
            return;
        }

        pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintInlining", "-version");
        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Error: VM option 'PrintInlining' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.");

        pb = ProcessTools.createJavaProcessBuilder("-XX:+TraceJNICalls", "-version");
        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Error: VM option 'TraceJNICalls' is develop and is available only in debug version of VM.");

        pb = ProcessTools.createJavaProcessBuilder("-XX:+TraceJVMCalls", "-version");
        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Error: VM option 'TraceJVMCalls' is notproduct and is available only in debug version of VM.");
    }
}