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|
(* *********************************************************************)
(* *)
(* The Compcert verified compiler *)
(* *)
(* Xavier Leroy, INRIA Paris-Rocquencourt *)
(* *)
(* Copyright Institut National de Recherche en Informatique et en *)
(* Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU General Public License as published by *)
(* the Free Software Foundation, either version 2 of the License, or *)
(* (at your option) any later version. This file is also distributed *)
(* under the terms of the INRIA Non-Commercial License Agreement. *)
(* *)
(* *********************************************************************)
open Printf
open Commandline
open Clflags
open CommonOptions
open Driveraux
open Frontend
open Diagnostics
let tool_name = "Clight generator"
(* clightgen-specific options *)
let option_normalize = ref false
(* From CompCert C AST to Clight *)
let compile_c_ast sourcename csyntax ofile =
let loc = file_loc sourcename in
let clight =
match SimplExpr.transl_program csyntax with
| Errors.OK p ->
begin match SimplLocals.transf_program p with
| Errors.OK p' ->
if !option_normalize
then Clightnorm.norm_program p'
else p'
| Errors.Error msg ->
fatal_error loc "%a" print_error msg
end
| Errors.Error msg ->
fatal_error loc "%a" print_error msg in
(* Dump Clight in C syntax if requested *)
if !option_dclight then begin
let ofile = Filename.chop_suffix sourcename ".c" ^ ".light.c" in
let oc = open_out ofile in
PrintClight.print_program (Format.formatter_of_out_channel oc) clight;
close_out oc
end;
(* Print Clight in Coq syntax *)
let oc = open_out ofile in
ExportClight.print_program (Format.formatter_of_out_channel oc) clight;
close_out oc
(* From C source to Clight *)
let compile_c_file sourcename ifile ofile =
compile_c_ast sourcename (parse_c_file sourcename ifile) ofile
let output_filename sourcename suff =
let prefixname = Filename.chop_suffix sourcename suff in
output_filename_default (prefixname ^ ".v")
(* Processing of a .c file *)
let process_c_file sourcename =
ensure_inputfile_exists sourcename;
let ofile = output_filename sourcename ".c" in
if !option_E then begin
preprocess sourcename "-"
end else begin
let preproname = Driveraux.tmp_file ".i" in
preprocess sourcename preproname;
compile_c_file sourcename preproname ofile
end
(* Processing of a .i file *)
let process_i_file sourcename =
ensure_inputfile_exists sourcename;
let ofile = output_filename sourcename ".i" in
compile_c_file sourcename sourcename ofile
let usage_string =
version_string tool_name^
{|Usage: clightgen [options] <source files>
Recognized source files:
.c C source file
.i or .p C source file that should not be preprocessed
Processing options:
-normalize Normalize the generated Clight code w.r.t. loads in expressions
-E Preprocess only, send result to standard output
-o <file> Generate output in <file>
|} ^
prepro_help ^
language_support_help ^
{|Tracing options:
-dparse Save C file after parsing and elaboration in <file>.parsed.c
-dc Save generated Compcert C in <file>.compcert.c
-dclight Save generated Clight in <file>.light.c
|} ^
general_help ^
warning_help
let print_usage_and_exit () =
printf "%s" usage_string; exit 0
let set_all opts () = List.iter (fun r -> r := true) opts
let unset_all opts () = List.iter (fun r -> r := false) opts
let actions : ((string -> unit) * string) list ref = ref []
let push_action fn arg =
actions := (fn, arg) :: !actions
let perform_actions () =
let rec perform = function
| [] -> ()
| (fn,arg) :: rem -> fn arg; perform rem
in perform (List.rev !actions)
let num_input_files = ref 0
let cmdline_actions =
[
(* Getting help *)
Exact "-help", Unit print_usage_and_exit;
Exact "--help", Unit print_usage_and_exit;]
(* Getting version info *)
@ version_options tool_name @
(* Processing options *)
[ Exact "-E", Set option_E;
Exact "-normalize", Set option_normalize;
Exact "-o", String(fun s -> option_o := Some s);
Prefix "-o", Self (fun s -> let s = String.sub s 2 ((String.length s) - 2) in
option_o := Some s);]
(* Preprocessing options *)
@ prepro_actions @
(* Tracing options *)
[ Exact "-dparse", Set option_dparse;
Exact "-dc", Set option_dcmedium;
Exact "-dclight", Set option_dclight;]
@ general_options
(* Diagnostic options *)
@ warning_options
@ language_support_options @
(* Catch options that are not handled *)
[Prefix "-", Self (fun s ->
fatal_error no_loc "Unknown option `%s'" s);
(* File arguments *)
Suffix ".c", Self (fun s ->
incr num_input_files; push_action process_c_file s);
Suffix ".i", Self (fun s ->
incr num_input_files; push_action process_i_file s);
Suffix ".p", Self (fun s ->
incr num_input_files; push_action process_i_file s);
]
let _ =
try
Gc.set { (Gc.get()) with
Gc.minor_heap_size = 524288; (* 512k *)
Gc.major_heap_increment = 4194304 (* 4M *)
};
Printexc.record_backtrace true;
Frontend.init ();
parse_cmdline cmdline_actions;
if !option_o <> None && !num_input_files >= 2 then
fatal_error no_loc "Ambiguous '-o' option (multiple source files)";
if !num_input_files = 0 then
fatal_error no_loc "no input file";
perform_actions ()
with
| Sys_error msg
| CmdError msg -> error no_loc "%s" msg; exit 2
| Abort -> exit 2
| e -> crash e
|
