File: trace.mli

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(**************************************************************************)
(*                                                                        *)
(*                                 OCaml                                  *)
(*                                                                        *)
(*             Xavier Leroy, projet Cristal, INRIA Rocquencourt           *)
(*                                                                        *)
(*   Copyright 1996 Institut National de Recherche en Informatique et     *)
(*     en Automatique.                                                    *)
(*                                                                        *)
(*   All rights reserved.  This file is distributed under the terms of    *)
(*   the GNU Lesser General Public License version 2.1, with the          *)
(*   special exception on linking described in the file LICENSE.          *)
(*                                                                        *)
(**************************************************************************)

(* The "trace" facility *)

open Format

type codeptr

type traced_function =
  { path: Path.t;                       (* Name under which it is traced *)
    closure: Obj.t;                     (* Its function closure (patched) *)
    actual_code: codeptr;               (* Its original code pointer *)
    instrumented_fun: codeptr -> Obj.t -> Obj.t -> Obj.t }
                                        (* Printing function *)

val traced_functions: traced_function list ref
val is_traced: Obj.t -> Path.t option
val get_code_pointer: Obj.t -> codeptr
val set_code_pointer: Obj.t -> codeptr -> unit
val instrument_closure:
        Env.t -> Longident.t -> formatter -> Types.type_expr ->
        codeptr -> Obj.t -> Obj.t -> Obj.t
val print_trace: Obj.t -> Obj.t -> Obj.t