2 * Copyright 2010, INRIA, University of Copenhagen
3 * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix
4 * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
5 * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
6 * This file is part of Coccinelle.
8 * Coccinelle is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, according to version 2 of the License.
12 * Coccinelle is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>.
20 * The authors reserve the right to distribute this or future versions of
21 * Coccinelle under other licenses.
25 module Past
= Ast_popl
26 module Ast
= Ast_cocci
27 module V
= Visitor_ast
30 (* --------------------------------------------------------------------- *)
33 type cocci_predicate
= Lib_engine.predicate
* Ast.meta_name
Ast_ctl.modif
35 (cocci_predicate
,Ast_cocci.meta_name
, Wrapper_ctl.info
) Ast_ctl.generic_ctl
37 (* --------------------------------------------------------------------- *)
40 let bind x y
= x
or y
in
41 let option_default = false in
42 let mcode r
(_
,_
,kind
,_
) =
44 Ast.MINUS
(_
,_
) -> true
45 | Ast.PLUS
-> failwith
"not possible"
46 | Ast.CONTEXT
(_
,info
) -> not
(info
= Ast.NOTHING
) in
47 let do_nothing r k e
= k e
in
48 let rule_elem r k re
=
50 match Ast.unwrap re
with
51 Ast.FunHeader
(bef
,_
,fninfo
,name
,lp
,params
,rp
) ->
52 bind (mcode r
((),(),bef
,[])) res
53 | Ast.Decl
(bef
,_
,decl
) -> bind (mcode r
((),(),bef
,[])) res
56 V.combiner
bind option_default
57 mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode
59 do_nothing do_nothing do_nothing do_nothing
60 do_nothing do_nothing do_nothing do_nothing do_nothing do_nothing
61 do_nothing rule_elem do_nothing do_nothing do_nothing do_nothing in
62 recursor.V.combiner_rule_elem
64 let ctl_exists v x keep_wit
= CTL.Exists
(v
,x
,keep_wit
)
66 let predmaker guard term
=
67 let pos = ("","_p") in
69 (if guard
&& contains_modif term
73 (CTL.Pred
(Lib_engine.Match
(term
),CTL.Modif
v))
74 else CTL.Pred
(Lib_engine.Match
(term
),CTL.Control
))
76 (* --------------------------------------------------------------------- *)
78 let is_true = function CTL.True
-> true | _
-> false
80 let is_false = function CTL.False
-> true | _
-> false
82 let ctl_true = CTL.True
84 let ctl_false = CTL.False
88 else if is_true y
then x
else CTL.And
(CTL.STRICT
,x
,y
)
92 else if is_false y
then x
else CTL.Or
(x
,y
)
94 let ctl_seqor x y
= CTL.SeqOr
(x
,y
)
96 let ctl_not x
= CTL.Not
(x
)
99 if is_true x
then CTL.True
100 else CTL.AX
(CTL.FORWARD
,CTL.STRICT
,x
)
102 let after = CTL.Pred
(Lib_engine.After
, CTL.Control
)
103 let exit = CTL.Pred
(Lib_engine.Exit
, CTL.Control
)
104 let truepred = CTL.Pred
(Lib_engine.TrueBranch
, CTL.Control
)
105 let retpred = CTL.Pred
(Lib_engine.Return
, CTL.Control
)
107 let string2var x
= ("",x
)
110 let get_label_ctr _
=
111 let cur = !labelctr in
113 string2var (Printf.sprintf
"l%d" cur)
115 let ctl_au x seq_after y
=
116 let lv = get_label_ctr() in
117 let labelpred = CTL.Pred
(Lib_engine.Label
lv,CTL.Control
) in
118 let preflabelpred = CTL.Pred
(Lib_engine.PrefixLabel
lv,CTL.Control
) in
119 let matchgoto = CTL.Pred
(Lib_engine.Goto
,CTL.Control
) in
123 (Ast.Break
(Ast.make_mcode
"break",Ast.make_mcode
";"))) in
127 (Ast.Continue
(Ast.make_mcode
"continue",Ast.make_mcode
";"))) in
130 (ctl_and (ctl_and truepred labelpred)
132 (CTL.FORWARD
,CTL.STRICT
,preflabelpred,
133 ctl_and preflabelpred
135 (ctl_and (ctl_or (ctl_or matchgoto matchbreak) matchcontinue)
137 (CTL.FORWARD
,CTL.STRICT
,
138 ctl_not seq_after
))))))) in
139 CTL.AU
(CTL.FORWARD
,CTL.STRICT
,x
,ctl_or y
stop_early)
141 let ctl_uncheck x
= CTL.Uncheck
(x
)
143 (* --------------------------------------------------------------------- *)
145 let rec ctl_seq keep_wit a
= function
146 Past.Seq
(elem
,seq
) ->
147 ctl_element keep_wit
(ctl_seq keep_wit a seq
) elem
149 | Past.SExists
(var
,seq
) -> ctl_exists keep_wit var
(ctl_seq keep_wit a seq
)
151 and ctl_element keep_wit a
= function
152 Past.Term
(term
) -> ctl_and (predmaker keep_wit term
) (ctl_ax a
)
153 | Past.Or
(seq1
,seq2
) ->
154 ctl_seqor (ctl_seq keep_wit a seq1
) (ctl_seq keep_wit a seq2
)
155 | Past.DInfo
(dots
,seq_bef
,seq_aft
) ->
157 List.fold_left
ctl_or ctl_false
158 (List.map
(ctl_element
false ctl_true) l
) in
159 let s = shortest (Common.union_set seq_bef seq_aft
) in
160 ctl_au (ctl_and (guard_ctl_dots keep_wit dots
) (ctl_not s))
162 | Past.EExists
(var
,elem
) ->
163 ctl_exists keep_wit var
(ctl_element keep_wit a elem
)
165 (* --------------------------------------------------------------------- *)
167 and guard_ctl_seq keep_wit
= function
168 Past.Seq
(elem
,Past.Empty
) -> guard_ctl_element keep_wit elem
169 | Past.Seq
(elem
,seq
) ->
170 ctl_element keep_wit
(guard_ctl_seq keep_wit seq
) elem
171 | Past.Empty
-> ctl_true
172 | Past.SExists
(var
,seq
) ->
173 ctl_exists keep_wit var
(guard_ctl_seq keep_wit seq
)
175 and guard_ctl_element keep_wit
= function
176 Past.Term
(term
) -> predmaker keep_wit term
177 | Past.Or
(seq1
,seq2
) ->
178 ctl_seqor (guard_ctl_seq keep_wit seq1
) (guard_ctl_seq keep_wit seq2
)
179 | Past.DInfo
(dots
,seq_bef
,seq_aft
) ->
181 List.fold_left
ctl_or ctl_false
182 (List.map
(ctl_element
false ctl_true) l
) in
183 let s = shortest (Common.union_set seq_bef seq_aft
) in
184 let aft = ctl_or s exit in
185 ctl_au (ctl_and (guard_ctl_dots keep_wit dots
) (ctl_not s))
186 (shortest seq_aft
) aft
187 | Past.EExists
(var
,elem
) ->
188 ctl_exists keep_wit var
(guard_ctl_element keep_wit elem
)
190 and guard_ctl_dots keep_wit
= function
191 Past.Dots
-> ctl_true
192 | Past.Nest
(_
) when not keep_wit
-> ctl_true
194 ctl_or (guard_ctl_seq
true seq
) (ctl_not (guard_ctl_seq
false seq
))
195 | Past.When
(dots
,seq
) ->
197 (guard_ctl_dots keep_wit dots
)
198 (ctl_not (ctl_seq false ctl_true seq
))
199 | Past.DExists
(var
,dots
) ->
200 ctl_exists keep_wit var
(guard_ctl_dots keep_wit dots
)
202 (* --------------------------------------------------------------------- *)
204 let toctl sl
= Asttoctl2.CODE
(ctl_seq true ctl_true sl
)