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1 | (* |
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. | |
7 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
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/>. | |
19 | * | |
20 | * The authors reserve the right to distribute this or future versions of | |
21 | * Coccinelle under other licenses. | |
22 | *) | |
23 | ||
24 | ||
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25 | (* find unitary metavariables *) |
26 | module Ast0 = Ast0_cocci | |
27 | module Ast = Ast_cocci | |
28 | module V0 = Visitor_ast0 | |
b1b2de81 | 29 | module VT0 = Visitor_ast0_types |
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30 | |
31 | let set_minus s minus = List.filter (function n -> not (List.mem n minus)) s | |
32 | ||
33 | let rec nub = function | |
34 | [] -> [] | |
35 | | (x::xs) when (List.mem x xs) -> nub xs | |
36 | | (x::xs) -> x::(nub xs) | |
37 | ||
38 | (* ----------------------------------------------------------------------- *) | |
39 | (* Find the variables that occur free and occur free in a unitary way *) | |
40 | ||
41 | (* take everything *) | |
42 | let minus_checker name = let id = Ast0.unwrap_mcode name in [id] | |
43 | ||
44 | (* take only what is in the plus code *) | |
708f4980 | 45 | let plus_checker (nm,_,_,mc,_,_) = |
951c7801 | 46 | match mc with Ast0.PLUS _ -> [nm] | _ -> [] |
faf9a90c | 47 | |
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48 | let get_free checker t = |
49 | let bind x y = x @ y in | |
50 | let option_default = [] in | |
faf9a90c | 51 | |
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52 | (* considers a single list *) |
53 | let collect_unitary_nonunitary free_usage = | |
54 | let free_usage = List.sort compare free_usage in | |
55 | let rec loop1 todrop = function | |
56 | [] -> [] | |
57 | | (x::xs) as all -> if x = todrop then loop1 todrop xs else all in | |
58 | let rec loop2 = function | |
59 | [] -> ([],[]) | |
60 | | [x] -> ([x],[]) | |
61 | | x::y::xs -> | |
62 | if x = y | |
63 | then | |
64 | let (unitary,non_unitary) = loop2(loop1 x xs) in | |
65 | (unitary,x::non_unitary) | |
66 | else | |
67 | let (unitary,non_unitary) = loop2 (y::xs) in | |
68 | (x::unitary,non_unitary) in | |
69 | loop2 free_usage in | |
faf9a90c | 70 | |
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71 | (* considers a list of lists *) |
72 | let detect_unitary_frees l = | |
73 | let (unitary,nonunitary) = | |
74 | List.split (List.map collect_unitary_nonunitary l) in | |
75 | let unitary = nub (List.concat unitary) in | |
76 | let nonunitary = nub (List.concat nonunitary) in | |
77 | let unitary = | |
78 | List.filter (function x -> not (List.mem x nonunitary)) unitary in | |
79 | unitary@nonunitary@nonunitary in | |
80 | ||
1be43e12 | 81 | let whencode afn bfn expression = function |
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82 | Ast0.WhenNot(a) -> afn a |
83 | | Ast0.WhenAlways(b) -> bfn b | |
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84 | | Ast0.WhenModifier(_) -> option_default |
85 | | Ast0.WhenNotTrue(a) -> expression a | |
86 | | Ast0.WhenNotFalse(a) -> expression a in | |
faf9a90c | 87 | |
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88 | let ident r k i = |
89 | match Ast0.unwrap i with | |
90 | Ast0.MetaId(name,_,_) | Ast0.MetaFunc(name,_,_) | |
91 | | Ast0.MetaLocalFunc(name,_,_) -> checker name | |
92 | | _ -> k i in | |
faf9a90c | 93 | |
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94 | let expression r k e = |
95 | match Ast0.unwrap e with | |
96 | Ast0.MetaErr(name,_,_) | Ast0.MetaExpr(name,_,_,_,_) | |
97 | | Ast0.MetaExprList(name,_,_) -> checker name | |
98 | | Ast0.DisjExpr(starter,expr_list,mids,ender) -> | |
b1b2de81 | 99 | detect_unitary_frees(List.map r.VT0.combiner_rec_expression expr_list) |
34e49164 | 100 | | _ -> k e in |
faf9a90c | 101 | |
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102 | let typeC r k t = |
103 | match Ast0.unwrap t with | |
104 | Ast0.MetaType(name,_) -> checker name | |
105 | | Ast0.DisjType(starter,types,mids,ender) -> | |
b1b2de81 | 106 | detect_unitary_frees(List.map r.VT0.combiner_rec_typeC types) |
34e49164 | 107 | | _ -> k t in |
faf9a90c | 108 | |
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109 | let parameter r k p = |
110 | match Ast0.unwrap p with | |
111 | Ast0.MetaParam(name,_) | Ast0.MetaParamList(name,_,_) -> checker name | |
112 | | _ -> k p in | |
faf9a90c | 113 | |
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114 | let declaration r k d = |
115 | match Ast0.unwrap d with | |
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116 | Ast0.MetaDecl(name,_) | Ast0.MetaField(name,_) -> checker name |
117 | | Ast0.DisjDecl(starter,decls,mids,ender) -> | |
b1b2de81 | 118 | detect_unitary_frees(List.map r.VT0.combiner_rec_declaration decls) |
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119 | | _ -> k d in |
120 | ||
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121 | let case_line r k c = |
122 | match Ast0.unwrap c with | |
123 | Ast0.DisjCase(starter,case_lines,mids,ender) -> | |
124 | detect_unitary_frees(List.map r.VT0.combiner_rec_case_line case_lines) | |
125 | | _ -> k c in | |
126 | ||
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127 | let statement r k s = |
128 | match Ast0.unwrap s with | |
129 | Ast0.MetaStmt(name,_) | Ast0.MetaStmtList(name,_) -> checker name | |
130 | | Ast0.Disj(starter,stmt_list,mids,ender) -> | |
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131 | detect_unitary_frees |
132 | (List.map r.VT0.combiner_rec_statement_dots stmt_list) | |
34e49164 | 133 | | Ast0.Nest(starter,stmt_dots,ender,whn,multi) -> |
b1b2de81 | 134 | bind (r.VT0.combiner_rec_statement_dots stmt_dots) |
faf9a90c | 135 | (detect_unitary_frees |
34e49164 | 136 | (List.map |
b1b2de81 | 137 | (whencode |
ae4735db | 138 | r.VT0.combiner_rec_statement_dots |
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139 | r.VT0.combiner_rec_statement |
140 | r.VT0.combiner_rec_expression) | |
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141 | whn)) |
142 | | Ast0.Dots(d,whn) | Ast0.Circles(d,whn) | Ast0.Stars(d,whn) -> | |
143 | detect_unitary_frees | |
144 | (List.map | |
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145 | (whencode |
146 | r.VT0.combiner_rec_statement_dots r.VT0.combiner_rec_statement | |
147 | r.VT0.combiner_rec_expression) | |
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148 | whn) |
149 | | _ -> k s in | |
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150 | |
151 | let res = V0.combiner bind option_default | |
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152 | {V0.combiner_functions with |
153 | VT0.combiner_identfn = ident; | |
154 | VT0.combiner_exprfn = expression; | |
155 | VT0.combiner_tyfn = typeC; | |
156 | VT0.combiner_paramfn = parameter; | |
157 | VT0.combiner_declfn = declaration; | |
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158 | VT0.combiner_stmtfn = statement; |
159 | VT0.combiner_casefn = case_line} in | |
faf9a90c | 160 | |
34e49164 | 161 | collect_unitary_nonunitary |
b1b2de81 | 162 | (List.concat (List.map res.VT0.combiner_rec_top_level t)) |
faf9a90c | 163 | |
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164 | (* ----------------------------------------------------------------------- *) |
165 | (* update the variables that are unitary *) | |
faf9a90c | 166 | |
34e49164 | 167 | let update_unitary unitary = |
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168 | let is_unitary name = |
169 | match (List.mem (Ast0.unwrap_mcode name) unitary, | |
485bce71 C |
170 | !Flag.sgrep_mode2, Ast0.get_mcode_mcodekind name) with |
171 | (true,true,_) | (true,_,Ast0.CONTEXT(_)) -> Ast0.PureContext | |
172 | | (true,_,_) -> Ast0.Pure | |
173 | | (false,true,_) | (false,_,Ast0.CONTEXT(_)) -> Ast0.Context | |
174 | | (false,_,_) -> Ast0.Impure in | |
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175 | |
176 | let ident r k i = | |
177 | match Ast0.unwrap i with | |
178 | Ast0.MetaId(name,constraints,_) -> | |
179 | Ast0.rewrap i (Ast0.MetaId(name,constraints,is_unitary name)) | |
180 | | Ast0.MetaFunc(name,constraints,_) -> | |
181 | Ast0.rewrap i (Ast0.MetaFunc(name,constraints,is_unitary name)) | |
182 | | Ast0.MetaLocalFunc(name,constraints,_) -> | |
183 | Ast0.rewrap i (Ast0.MetaLocalFunc(name,constraints,is_unitary name)) | |
184 | | _ -> k i in | |
185 | ||
186 | let expression r k e = | |
187 | match Ast0.unwrap e with | |
188 | Ast0.MetaErr(name,constraints,_) -> | |
189 | Ast0.rewrap e (Ast0.MetaErr(name,constraints,is_unitary name)) | |
190 | | Ast0.MetaExpr(name,constraints,ty,form,_) -> | |
191 | Ast0.rewrap e (Ast0.MetaExpr(name,constraints,ty,form,is_unitary name)) | |
192 | | Ast0.MetaExprList(name,lenname,_) -> | |
193 | Ast0.rewrap e (Ast0.MetaExprList(name,lenname,is_unitary name)) | |
194 | | _ -> k e in | |
faf9a90c | 195 | |
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196 | let typeC r k t = |
197 | match Ast0.unwrap t with | |
198 | Ast0.MetaType(name,_) -> | |
199 | Ast0.rewrap t (Ast0.MetaType(name,is_unitary name)) | |
200 | | _ -> k t in | |
faf9a90c | 201 | |
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202 | let parameter r k p = |
203 | match Ast0.unwrap p with | |
204 | Ast0.MetaParam(name,_) -> | |
205 | Ast0.rewrap p (Ast0.MetaParam(name,is_unitary name)) | |
206 | | Ast0.MetaParamList(name,lenname,_) -> | |
207 | Ast0.rewrap p (Ast0.MetaParamList(name,lenname,is_unitary name)) | |
208 | | _ -> k p in | |
faf9a90c | 209 | |
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210 | let statement r k s = |
211 | match Ast0.unwrap s with | |
212 | Ast0.MetaStmt(name,_) -> | |
213 | Ast0.rewrap s (Ast0.MetaStmt(name,is_unitary name)) | |
214 | | Ast0.MetaStmtList(name,_) -> | |
215 | Ast0.rewrap s (Ast0.MetaStmtList(name,is_unitary name)) | |
216 | | _ -> k s in | |
faf9a90c | 217 | |
34e49164 | 218 | let res = V0.rebuilder |
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219 | {V0.rebuilder_functions with |
220 | VT0.rebuilder_identfn = ident; | |
221 | VT0.rebuilder_exprfn = expression; | |
222 | VT0.rebuilder_tyfn = typeC; | |
223 | VT0.rebuilder_paramfn = parameter; | |
224 | VT0.rebuilder_stmtfn = statement} in | |
34e49164 | 225 | |
b1b2de81 | 226 | List.map res.VT0.rebuilder_rec_top_level |
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227 | |
228 | (* ----------------------------------------------------------------------- *) | |
229 | ||
230 | let rec split3 = function | |
231 | [] -> ([],[],[]) | |
232 | | (a,b,c)::xs -> let (l1,l2,l3) = split3 xs in (a::l1,b::l2,c::l3) | |
233 | ||
234 | let rec combine3 = function | |
235 | ([],[],[]) -> [] | |
236 | | (a::l1,b::l2,c::l3) -> (a,b,c) :: combine3 (l1,l2,l3) | |
237 | | _ -> failwith "not possible" | |
238 | ||
239 | (* ----------------------------------------------------------------------- *) | |
240 | (* process all rules *) | |
241 | ||
242 | let do_unitary rules = | |
243 | let rec loop = function | |
244 | [] -> ([],[]) | |
245 | | (r::rules) -> | |
246 | match r with | |
413ffc02 | 247 | Ast0.ScriptRule (_,_,_,_,_,_) |
174d1640 | 248 | | Ast0.InitialScriptRule (_,_,_,_) | Ast0.FinalScriptRule (_,_,_,_) -> |
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249 | let (x,rules) = loop rules in |
250 | (x, r::rules) | |
faf9a90c | 251 | | Ast0.CocciRule ((minus,metavars,chosen_isos),((plus,_) as plusz),rt) -> |
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252 | let mm1 = List.map Ast.get_meta_name metavars in |
253 | let (used_after, rest) = loop rules in | |
254 | let (m_unitary, m_nonunitary) = get_free minus_checker minus in | |
255 | let (p_unitary, p_nonunitary) = get_free plus_checker plus in | |
faf9a90c | 256 | let p_free = |
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257 | if !Flag.sgrep_mode2 then [] |
258 | else p_unitary @ p_nonunitary in | |
259 | let (in_p, m_unitary) = | |
260 | List.partition (function x -> List.mem x p_free) m_unitary in | |
261 | let m_nonunitary = in_p @ m_nonunitary in | |
262 | let (m_unitary, not_local) = | |
263 | List.partition (function x -> List.mem x mm1) m_unitary in | |
264 | let m_unitary = | |
265 | List.filter (function x -> not (List.mem x used_after)) | |
266 | m_unitary in | |
267 | let rebuilt = update_unitary m_unitary minus in | |
268 | (set_minus (m_nonunitary @ used_after) mm1, | |
269 | (Ast0.CocciRule | |
faf9a90c | 270 | ((rebuilt, metavars, chosen_isos),plusz,rt))::rest) in |
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271 | let (_,rules) = loop rules in |
272 | rules | |
273 | ||
274 | (* | |
275 | let do_unitary minus plus = | |
276 | let (minus,metavars,chosen_isos) = split3 minus in | |
277 | let (plus,_) = List.split plus in | |
278 | let rec loop = function | |
279 | ([],[],[]) -> ([],[]) | |
280 | | (mm1::metavars,m1::minus,p1::plus) -> | |
281 | let mm1 = List.map Ast.get_meta_name mm1 in | |
282 | let (used_after,rest) = loop (metavars,minus,plus) in | |
283 | let (m_unitary,m_nonunitary) = get_free minus_checker m1 in | |
284 | let (p_unitary,p_nonunitary) = get_free plus_checker p1 in | |
285 | let p_free = | |
286 | if !Flag.sgrep_mode2 | |
287 | then [] | |
288 | else p_unitary @ p_nonunitary in | |
289 | let (in_p,m_unitary) = | |
290 | List.partition (function x -> List.mem x p_free) m_unitary in | |
291 | let m_nonunitary = in_p@m_nonunitary in | |
292 | let (m_unitary,not_local) = | |
293 | List.partition (function x -> List.mem x mm1) m_unitary in | |
294 | let m_unitary = | |
295 | List.filter (function x -> not(List.mem x used_after)) m_unitary in | |
296 | let rebuilt = update_unitary m_unitary m1 in | |
297 | (set_minus (m_nonunitary @ used_after) mm1, | |
298 | rebuilt::rest) | |
299 | | _ -> failwith "not possible" in | |
300 | let (_,rules) = loop (metavars,minus,plus) in | |
301 | combine3 (rules,metavars,chosen_isos) | |
302 | *) |