(*
 * Copyright (c) 2009-2013, Monoidics ltd.
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *)

open! IStd

(** State of symbolic execution *)

type t

val get_instr : unit -> Sil.instr option
(** Get last instruction seen in symbolic execution *)

val get_loc_exn : unit -> Location.t
(** Get last location seen in symbolic execution *)

val get_loc : unit -> Location.t option
(** Get last location seen in symbolic execution *)

val get_node_exn : unit -> Procdesc.Node.t
(** Get last node seen in symbolic execution *)

val get_node : unit -> Procdesc.Node.t option
(** Get last node seen in symbolic execution *)

val get_session : unit -> int
(** Get last session seen in symbolic execution *)

val set_instr : Sil.instr -> unit
(** Set last instruction seen in symbolic execution *)

val set_node : Procdesc.Node.t -> unit
(** Set last node seen in symbolic execution *)

val set_session : int -> unit
(** Set last session seen in symbolic execution *)

(** {2 State management} *)

val restore : t -> unit
(** Restore the old state. *)

val save : unit -> t
(** Return the old state, and revert the current state to the initial one. *)