Source file libmaincil.ml

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(*

   Copyright (c) 2001-2002,
    George C. Necula    <necula@cs.berkeley.edu>
    Scott McPeak        <smcpeak@cs.berkeley.edu>
    Wes Weimer          <weimer@cs.berkeley.edu>
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are
   met:

   1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   3. The names of the contributors may not be used to endorse or promote
   products derived from this software without specific prior written
   permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *)

(* libmaincil *)
(* this is a replacement for maincil.ml, for the case when we're
   creating a C-callable library (libcil.o); all it does is register
   a couple of functions and initialize CIL *)


module E = Errormsg

open Cil


(* print a Cil 'file' to stdout *)
let unparseToStdout (cil : file) : unit =
begin
  dumpFile defaultCilPrinter stdout cil.fileName cil
end;;

(* a visitor to unroll all types - may need to do some magic to keep attributes *)
class unrollVisitorClass = object (self)
  inherit nopCilVisitor

  (* variable declaration *)
  method! vvdec (vi : varinfo) : varinfo visitAction =
    begin
      vi.vtype <- unrollTypeDeep vi.vtype;
      (*ignore (E.log "varinfo for %s in file '%s' line %d byte %d\n" vi.vname vi.vdecl.file vi.vdecl.line vi.vdecl.byte);*)
      SkipChildren
    end

  (* global: need to unroll fields of compinfo *)
  method! vglob (g : global) : global list visitAction =
    begin
      match g with
          GCompTag(ci, loc) ->
            let doFieldinfo (fi : fieldinfo) : unit =
              fi.ftype <- unrollTypeDeep fi.ftype
            in begin
                ignore(Util.list_map doFieldinfo ci.cfields);
                (*ChangeTo [g]*)
                SkipChildren
              end
        | _ -> DoChildren
    end
end;;


let unrollVisitor = new unrollVisitorClass;;

(* open and parse a C file into a Cil 'file', unroll all typedefs *)
let parseOneFile (fname: string) : file =
  let ast : file = Frontc.parse fname () in
    begin
      visitCilFile unrollVisitor ast;
      ast
    end
;;

let getDummyTypes () : typ * typ =
  ( TPtr(TVoid [], []), TInt(IInt, []) )
;;

(* register some functions - these may be called from C code *)
Callback.register "cil_parse" parseOneFile;
Callback.register "cil_unparse" unparseToStdout;
(* Callback.register "unroll_type_deep" unrollTypeDeep; *)
Callback.register "get_dummy_types" getDummyTypes;

(* initialize CIL *)
initCIL ();