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Fanp

Overview

The fanp command line tool is used to dissemble compiled fcode. If you have a burning desire to hack the compiler or the runtime emit code, then you will find fanp indispensable. Like many of the other command line tools you can pass a pod name, a type qname, or a slot qname:

fanp fansh
fanp fansh::Main
fanp fansh::Main.main

By default only high level signatures and facets are printed. Print the usage via "-?" to see various options.

Dissembling Code

The "-c" option will dump the opcodes:

// fansh::Main.main
static Void main() { Shell.make.run }

// disassemble it
C:\>fanp -c fansh::Main.main

  main () -> sys::Void [const public static]
    [Code]
      0: CallNew             fansh::Shell.make() -> sys::Void
      3: CallVirtual         fansh::Shell.run() -> sys::Void
      6: ReturnVoid
    [LineNumber] size=2
       158