Proposal for a new JVM command line option or improvement to -XX:+PrintVMOptions to print all options passed to the VM possibly indicating the source of the options (_JAVA_OPTIONS, JAVA_TOOL_OPTIONS, -XX:VMOptionsFile, -XX:Flags and JNI Invocation API) as well.

Currently -XX:+PrintVMOptions only prints -XX flags and also drops the "-XX:" portion.

For example,
    java -XX:+IgnoreUnrecognizedVMOptions —bad-option -XX:+PrintVMOptions Test

This does not print “—bad-option”.