79 lines
2.7 KiB
OCaml
79 lines
2.7 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(* "Expunge" a toplevel by removing compiler modules from the global List.map.
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Usage: expunge <source file> <dest file> <names of modules to keep> *)
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open Sys
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open Misc
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module StringSet =
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Set.Make(struct
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type t = string
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let compare = compare
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end)
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let to_keep = ref StringSet.empty
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let expunge_map tbl =
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Symtable.filter_global_map
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(fun id -> StringSet.mem (Ident.name id) !to_keep)
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tbl
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let main () =
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let input_name = Sys.argv.(1) in
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let output_name = Sys.argv.(2) in
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Array.iter
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(fun exn -> to_keep := StringSet.add exn !to_keep)
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Runtimedef.builtin_exceptions;
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for i = 3 to Array.length Sys.argv - 1 do
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to_keep := StringSet.add (capitalize Sys.argv.(i)) !to_keep
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done;
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let ic = open_in_bin input_name in
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let pos_trailer =
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in_channel_length ic - 16 - String.length Config.exec_magic_number in
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seek_in ic pos_trailer;
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let code_size = input_binary_int ic in
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let data_size = input_binary_int ic in
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let symbol_size = input_binary_int ic in
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let debug_size = input_binary_int ic in
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let header = String.create(String.length Config.exec_magic_number) in
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really_input ic header 0 (String.length Config.exec_magic_number);
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if header <> Config.exec_magic_number then begin
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prerr_endline "Wrong magic number"; exit 2
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end;
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let oc =
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open_out_gen [Open_wronly; Open_creat; Open_trunc; Open_binary] 0o777 output_name in
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(* Copy the file up to the symbol section as is *)
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seek_in ic 0;
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copy_file_chunk ic oc (pos_trailer - symbol_size - debug_size);
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(* Read, expunge and rewrite the symbol section *)
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let global_map = (input_value ic : Symtable.global_map) in
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let pos1 = pos_out oc in
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output_value oc (expunge_map global_map);
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let pos2 = pos_out oc in
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(* Rewrite the trailer *)
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output_binary_int oc code_size;
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output_binary_int oc data_size;
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output_binary_int oc (pos2 - pos1);
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output_binary_int oc 0;
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output_string oc Config.exec_magic_number;
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(* Done *)
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close_in ic;
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close_out oc
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let _ = Printexc.catch main (); exit 0
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