package mopsa

  1. Overview
  2. Docs
Legend:
Page
Library
Module
Module type
Parameter
Class
Class type
Source

Source file simplified.ml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
(****************************************************************************)
(*                                                                          *)
(* This file is part of MOPSA, a Modular Open Platform for Static Analysis. *)
(*                                                                          *)
(* Copyright (C) 2017-2019 The MOPSA Project.                               *)
(*                                                                          *)
(* This program is free software: you can redistribute it and/or modify     *)
(* it under the terms of the GNU Lesser General Public License as published *)
(* by the Free Software Foundation, either version 3 of the License, or     *)
(* (at your option) any later version.                                      *)
(*                                                                          *)
(* This program is distributed in the hope that it will be useful,          *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of           *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *)
(* GNU Lesser General Public License for more details.                      *)
(*                                                                          *)
(* You should have received a copy of the GNU Lesser General Public License *)
(* along with this program.  If not, see <http://www.gnu.org/licenses/>.    *)
(*                                                                          *)
(****************************************************************************)

(** Leaf domains have a simplified interface that gives access to
    their local abstractions. The global manager and the flow abstraction are
    not accessible.
*)

open Core.All
open Mopsa_utils



(*==========================================================================*)
(**                         {2 Domain manager}                              *)
(*==========================================================================*)


(** Simplified domains are given a simplified manager providing access to
    queries on the pre-condition only 
*)
type ('a,'t) simplified_man = {
  exec : stmt -> 't;
  ask  : 'r. ('a,'r) query -> 'r;
}




module type SIMPLIFIED =
sig

  (** {2 Domain header} *)
  (** ***************** *)

  type t
  (** Type of an abstract elements. *)

  val id : t id
  (** Domain identifier *)

  val name : string
  (** Domain name *)

  val bottom: t
  (** Least abstract element of the lattice. *)

  val top: t
  (** Greatest abstract element of the lattice. *)


  (** {2 Predicates} *)
  (** ************** *)

  val is_bottom: t -> bool
  (** [is_bottom a] tests whether [a] is bottom or not. *)

  val subset: t -> t -> bool
  (** Partial order relation. [subset a1 a2] tests whether [a1] is
      related to (or included in) [a2]. *)


  (** {2 Operators} *)
  (** ************* *)

  val join: t -> t -> t
  (** [join a1 a2] computes an upper bound of [a1] and [a2]. *)

  val meet: t -> t -> t
  (** [meet a1 a2] computes a lower bound of [a1] and [a2]. *)

  val widen: 'a ctx -> t -> t -> t
  (** [widen ctx a1 a2] computes an upper bound of [a1] and [a2] that
      ensures stabilization of ascending chains. *)

  val merge : t -> t * change -> t * change -> t
  (** [merge pre (post1, change1) (post2, change2)] synchronizes two divergent
      post-conditions [post1] and [post2] using a common pre-condition [pre].

      Diverging post-conditions emerge after a fork-join trajectory in the
      abstraction DAG (e.g., a reduced product).

      The changes [change1] and [change2] represent a journal of internal statements
      executed during the the computation of the post-conditions over the
      two trajectories.
  *)


  (** {2 Transfer functions} *)
  (** ********************** *)

  val init : program -> t
  (** Initial abstract element *)

  val exec : stmt -> ('a,t) simplified_man -> 'a ctx -> t -> t option
  (** Computation of post-conditions *)

  val ask : ('a,'r) query -> ('a,t) simplified_man -> 'a ctx -> t -> 'r option
  (** Handler of queries *)


  (** {2 Printing} *)
  (** ************ *)

  val print_state : printer -> t -> unit
  (** Printer of an abstract element. *)

  val print_expr  : ('a,t) simplified_man -> 'a ctx -> t -> printer -> expr -> unit
  (** Printer of an expression's value *)

end


(*==========================================================================*)
(**                          {2 Registration}                               *)
(*==========================================================================*)


let domains : (module SIMPLIFIED) list ref = ref []


let register_simplified_domain dom =
  let module Dom = (val dom : SIMPLIFIED) in
  let rec iter = function
    | [] -> [dom]
    | hd :: tl ->
      let module Hd = (val hd : SIMPLIFIED) in
      if Hd.name = Dom.name
      then dom :: tl
      else hd :: iter tl
  in
  domains := iter !domains



let find_simplified_domain name =
  List.find (fun dom ->
      let module D = (val dom : SIMPLIFIED) in
      compare D.name name = 0
    ) !domains


let mem_simplified_domain name =
  List.exists (fun dom ->
      let module D = (val dom : SIMPLIFIED) in
      compare D.name name = 0
    ) !domains


let simplified_domain_names () =
  List.map (fun dom ->
      let module D = (val dom : SIMPLIFIED) in
      D.name
    ) !domains
OCaml

Innovation. Community. Security.