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1 | (* |
2 | * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen | |
3 | * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller | |
4 | * This file is part of Coccinelle. | |
5 | * | |
6 | * Coccinelle is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, according to version 2 of the License. | |
9 | * | |
10 | * Coccinelle is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>. | |
17 | * | |
18 | * The authors reserve the right to distribute this or future versions of | |
19 | * Coccinelle under other licenses. | |
20 | *) | |
21 | ||
22 | ||
23 | (* Potential problem: offset of mcode is not updated when an iso is | |
24 | instantiated, implying that a term may end up with many mcodes with the | |
25 | same offset. On the other hand, at the moment offset only seems to be used | |
26 | before this phase. Furthermore add_dot_binding relies on the offset to | |
27 | remain the same between matching an iso and instantiating it with bindings. *) | |
28 | ||
29 | (* --------------------------------------------------------------------- *) | |
30 | (* match a SmPL expression against a SmPL abstract syntax tree, | |
31 | either - or + *) | |
32 | ||
33 | module Ast = Ast_cocci | |
34 | module Ast0 = Ast0_cocci | |
35 | module V0 = Visitor_ast0 | |
36 | ||
37 | let current_rule = ref "" | |
38 | ||
39 | (* --------------------------------------------------------------------- *) | |
40 | ||
41 | type isomorphism = | |
42 | Ast_cocci.metavar list * Ast0_cocci.anything list list * string (* name *) | |
43 | ||
44 | let strip_info = | |
45 | let mcode (term,_,_,_,_) = | |
46 | (term,Ast0.NONE,Ast0.default_info(),Ast0.PLUS,ref Ast0.NoMetaPos) in | |
47 | let donothing r k e = | |
48 | let x = k e in | |
49 | {(Ast0.wrap (Ast0.unwrap x)) with | |
50 | Ast0.mcodekind = ref Ast0.PLUS; | |
51 | Ast0.true_if_test = x.Ast0.true_if_test} in | |
52 | V0.rebuilder | |
53 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
54 | donothing donothing donothing donothing donothing donothing | |
55 | donothing donothing donothing donothing donothing donothing donothing | |
56 | donothing donothing | |
57 | ||
58 | let anything_equal = function | |
59 | (Ast0.DotsExprTag(d1),Ast0.DotsExprTag(d2)) -> | |
60 | failwith "not a possible variable binding" (*not sure why these are pbs*) | |
61 | | (Ast0.DotsInitTag(d1),Ast0.DotsInitTag(d2)) -> | |
62 | failwith "not a possible variable binding" | |
63 | | (Ast0.DotsParamTag(d1),Ast0.DotsParamTag(d2)) -> | |
64 | failwith "not a possible variable binding" | |
65 | | (Ast0.DotsStmtTag(d1),Ast0.DotsStmtTag(d2)) -> | |
66 | (strip_info.V0.rebuilder_statement_dots d1) = | |
67 | (strip_info.V0.rebuilder_statement_dots d2) | |
68 | | (Ast0.DotsDeclTag(d1),Ast0.DotsDeclTag(d2)) -> | |
69 | failwith "not a possible variable binding" | |
70 | | (Ast0.DotsCaseTag(d1),Ast0.DotsCaseTag(d2)) -> | |
71 | failwith "not a possible variable binding" | |
72 | | (Ast0.IdentTag(d1),Ast0.IdentTag(d2)) -> | |
73 | (strip_info.V0.rebuilder_ident d1) = (strip_info.V0.rebuilder_ident d2) | |
74 | | (Ast0.ExprTag(d1),Ast0.ExprTag(d2)) -> | |
75 | (strip_info.V0.rebuilder_expression d1) = | |
76 | (strip_info.V0.rebuilder_expression d2) | |
77 | | (Ast0.ArgExprTag(_),_) | (_,Ast0.ArgExprTag(_)) -> | |
78 | failwith "not possible - only in isos1" | |
79 | | (Ast0.TestExprTag(_),_) | (_,Ast0.TestExprTag(_)) -> | |
80 | failwith "not possible - only in isos1" | |
81 | | (Ast0.TypeCTag(d1),Ast0.TypeCTag(d2)) -> | |
82 | (strip_info.V0.rebuilder_typeC d1) = | |
83 | (strip_info.V0.rebuilder_typeC d2) | |
84 | | (Ast0.InitTag(d1),Ast0.InitTag(d2)) -> | |
85 | (strip_info.V0.rebuilder_initialiser d1) = | |
86 | (strip_info.V0.rebuilder_initialiser d2) | |
87 | | (Ast0.ParamTag(d1),Ast0.ParamTag(d2)) -> | |
88 | (strip_info.V0.rebuilder_parameter d1) = | |
89 | (strip_info.V0.rebuilder_parameter d2) | |
90 | | (Ast0.DeclTag(d1),Ast0.DeclTag(d2)) -> | |
91 | (strip_info.V0.rebuilder_declaration d1) = | |
92 | (strip_info.V0.rebuilder_declaration d2) | |
93 | | (Ast0.StmtTag(d1),Ast0.StmtTag(d2)) -> | |
94 | (strip_info.V0.rebuilder_statement d1) = | |
95 | (strip_info.V0.rebuilder_statement d2) | |
96 | | (Ast0.CaseLineTag(d1),Ast0.CaseLineTag(d2)) -> | |
97 | (strip_info.V0.rebuilder_case_line d1) = | |
98 | (strip_info.V0.rebuilder_case_line d2) | |
99 | | (Ast0.TopTag(d1),Ast0.TopTag(d2)) -> | |
100 | (strip_info.V0.rebuilder_top_level d1) = | |
101 | (strip_info.V0.rebuilder_top_level d2) | |
102 | | (Ast0.IsoWhenTTag(_),_) | (_,Ast0.IsoWhenTTag(_)) -> | |
103 | failwith "only for isos within iso phase" | |
104 | | (Ast0.IsoWhenFTag(_),_) | (_,Ast0.IsoWhenFTag(_)) -> | |
105 | failwith "only for isos within iso phase" | |
106 | | (Ast0.IsoWhenTag(_),_) | (_,Ast0.IsoWhenTag(_)) -> | |
107 | failwith "only for isos within iso phase" | |
108 | | _ -> false | |
109 | ||
110 | let term (var1,_,_,_,_) = var1 | |
111 | let dot_term (var1,_,info,_,_) = ("", var1 ^ (string_of_int info.Ast0.offset)) | |
112 | ||
113 | ||
114 | type reason = | |
115 | NotPure of Ast0.pure * (string * string) * Ast0.anything | |
116 | | NotPureLength of (string * string) | |
117 | | ContextRequired of Ast0.anything | |
118 | | NonMatch | |
119 | | Braces of Ast0.statement | |
120 | | Position of string * string | |
121 | | TypeMatch of reason list | |
122 | ||
123 | let rec interpret_reason name line reason printer = | |
124 | Printf.printf | |
125 | "warning: iso %s does not match the code below on line %d\n" name line; | |
126 | printer(); Format.print_newline(); | |
127 | match reason with | |
128 | NotPure(Ast0.Pure,(_,var),nonpure) -> | |
129 | Printf.printf | |
130 | "pure metavariable %s is matched against the following nonpure code:\n" | |
131 | var; | |
132 | Unparse_ast0.unparse_anything nonpure | |
133 | | NotPure(Ast0.Context,(_,var),nonpure) -> | |
134 | Printf.printf | |
135 | "context metavariable %s is matched against the following\nnoncontext code:\n" | |
136 | var; | |
137 | Unparse_ast0.unparse_anything nonpure | |
138 | | NotPure(Ast0.PureContext,(_,var),nonpure) -> | |
139 | Printf.printf | |
140 | "pure context metavariable %s is matched against the following\nnonpure or noncontext code:\n" | |
141 | var; | |
142 | Unparse_ast0.unparse_anything nonpure | |
143 | | NotPureLength((_,var)) -> | |
144 | Printf.printf | |
145 | "pure metavariable %s is matched against too much or too little code\n" | |
146 | var; | |
147 | | ContextRequired(term) -> | |
148 | Printf.printf | |
149 | "the following code matched is not uniformly minus or context,\nor contains a disjunction:\n"; | |
150 | Unparse_ast0.unparse_anything term | |
151 | | Braces(s) -> | |
152 | Printf.printf "braces must be all minus (plus code allowed) or all\ncontext (plus code not allowed in the body) to match:\n"; | |
153 | Unparse_ast0.statement "" s; | |
154 | Format.print_newline() | |
155 | | Position(rule,name) -> | |
156 | Printf.printf "position variable %s.%s conflicts with an isomorphism\n" | |
157 | rule name; | |
158 | | TypeMatch reason_list -> | |
159 | List.iter (function r -> interpret_reason name line r printer) | |
160 | reason_list | |
161 | | _ -> failwith "not possible" | |
162 | ||
163 | type 'a either = OK of 'a | Fail of reason | |
164 | ||
165 | let add_binding var exp bindings = | |
166 | let var = term var in | |
167 | let attempt bindings = | |
168 | try | |
169 | let cur = List.assoc var bindings in | |
170 | if anything_equal(exp,cur) then [bindings] else [] | |
171 | with Not_found -> [((var,exp)::bindings)] in | |
172 | match List.concat(List.map attempt bindings) with | |
173 | [] -> Fail NonMatch | |
174 | | x -> OK x | |
175 | ||
176 | let add_dot_binding var exp bindings = | |
177 | let var = dot_term var in | |
178 | let attempt bindings = | |
179 | try | |
180 | let cur = List.assoc var bindings in | |
181 | if anything_equal(exp,cur) then [bindings] else [] | |
182 | with Not_found -> [((var,exp)::bindings)] in | |
183 | match List.concat(List.map attempt bindings) with | |
184 | [] -> Fail NonMatch | |
185 | | x -> OK x | |
186 | ||
187 | (* multi-valued *) | |
188 | let add_multi_dot_binding var exp bindings = | |
189 | let var = dot_term var in | |
190 | let attempt bindings = [((var,exp)::bindings)] in | |
191 | match List.concat(List.map attempt bindings) with | |
192 | [] -> Fail NonMatch | |
193 | | x -> OK x | |
194 | ||
195 | let rec nub ls = | |
196 | match ls with | |
197 | [] -> [] | |
198 | | (x::xs) when (List.mem x xs) -> nub xs | |
199 | | (x::xs) -> x::(nub xs) | |
200 | ||
201 | (* --------------------------------------------------------------------- *) | |
202 | ||
203 | let init_env = [[]] | |
204 | ||
205 | let debug str m binding = | |
206 | let res = m binding in | |
207 | (match res with | |
208 | None -> Printf.printf "%s: failed\n" str | |
209 | | Some binding -> | |
210 | List.iter | |
211 | (function binding -> | |
212 | Printf.printf "%s: %s\n" str | |
213 | (String.concat " " (List.map (function (x,_) -> x) binding))) | |
214 | binding); | |
215 | res | |
216 | ||
217 | let conjunct_bindings | |
218 | (m1 : 'binding -> 'binding either) | |
219 | (m2 : 'binding -> 'binding either) | |
220 | (binding : 'binding) : 'binding either = | |
221 | match m1 binding with Fail(reason) -> Fail(reason) | OK binding -> m2 binding | |
222 | ||
223 | let rec conjunct_many_bindings = function | |
224 | [] -> failwith "not possible" | |
225 | | [x] -> x | |
226 | | x::xs -> conjunct_bindings x (conjunct_many_bindings xs) | |
227 | ||
228 | let mcode_equal (x,_,_,_,_) (y,_,_,_,_) = x = y | |
229 | ||
230 | let return b binding = if b then OK binding else Fail NonMatch | |
231 | let return_false reason binding = Fail reason | |
232 | ||
233 | let match_option f t1 t2 = | |
234 | match (t1,t2) with | |
235 | (Some t1, Some t2) -> f t1 t2 | |
236 | | (None, None) -> return true | |
237 | | _ -> return false | |
238 | ||
239 | let bool_match_option f t1 t2 = | |
240 | match (t1,t2) with | |
241 | (Some t1, Some t2) -> f t1 t2 | |
242 | | (None, None) -> true | |
243 | | _ -> false | |
244 | ||
245 | (* context_required is for the example | |
246 | if ( | |
247 | + (int * ) | |
248 | x == NULL) | |
249 | where we can't change x == NULL to eg NULL == x. So there can either be | |
250 | nothing attached to the root or the term has to be all removed. | |
251 | if would be nice if we knew more about the relationship between the - and + | |
252 | code, because in the case where the + code is a separate statement in a | |
253 | sequence, this is not a problem. Perhaps something could be done in | |
254 | insert_plus | |
255 | ||
256 | The example seems strange. Why isn't the cast attached to x? | |
257 | *) | |
258 | let is_context e = | |
259 | !Flag.sgrep_mode2 or (* everything is context for sgrep *) | |
260 | (match Ast0.get_mcodekind e with | |
261 | Ast0.CONTEXT(cell) -> true | |
262 | | _ -> false) | |
263 | ||
264 | (* needs a special case when there is a Disj or an empty DOTS | |
265 | the following stops at the statement level, and gives true if one | |
266 | statement is replaced by another *) | |
267 | let rec is_pure_context s = | |
268 | !Flag.sgrep_mode2 or (* everything is context for sgrep *) | |
269 | (match Ast0.unwrap s with | |
270 | Ast0.Disj(starter,statement_dots_list,mids,ender) -> | |
271 | List.for_all | |
272 | (function x -> | |
273 | match Ast0.undots x with | |
274 | [s] -> is_pure_context s | |
275 | | _ -> false (* could we do better? *)) | |
276 | statement_dots_list | |
277 | | _ -> | |
278 | (match Ast0.get_mcodekind s with | |
279 | Ast0.CONTEXT(mc) -> | |
280 | (match !mc with | |
281 | (Ast.NOTHING,_,_) -> true | |
282 | | _ -> false) | |
283 | | Ast0.MINUS(mc) -> | |
284 | (match !mc with | |
285 | (* do better for the common case of replacing a stmt by another one *) | |
286 | ([[Ast.StatementTag(s)]],_) -> | |
287 | (match Ast.unwrap s with | |
288 | Ast.IfThen(_,_,_) -> false (* potentially dangerous *) | |
289 | | _ -> true) | |
290 | | (_,_) -> false) | |
291 | | _ -> false)) | |
292 | ||
293 | let is_minus e = | |
294 | match Ast0.get_mcodekind e with Ast0.MINUS(cell) -> true | _ -> false | |
295 | ||
296 | let match_list matcher is_list_matcher do_list_match la lb = | |
297 | let rec loop = function | |
298 | ([],[]) -> return true | |
299 | | ([x],lb) when is_list_matcher x -> do_list_match x lb | |
300 | | (x::xs,y::ys) -> conjunct_bindings (matcher x y) (loop (xs,ys)) | |
301 | | _ -> return false in | |
302 | loop (la,lb) | |
303 | ||
304 | let match_maker checks_needed context_required whencode_allowed = | |
305 | ||
306 | let check_mcode pmc cmc binding = | |
307 | if checks_needed | |
308 | then | |
309 | match Ast0.get_pos cmc with | |
310 | (Ast0.MetaPos (name,_,_)) as x -> | |
311 | (match Ast0.get_pos pmc with | |
312 | Ast0.MetaPos (name1,_,_) -> | |
313 | add_binding name1 (Ast0.MetaPosTag x) binding | |
314 | | Ast0.NoMetaPos -> | |
315 | let (rule,name) = Ast0.unwrap_mcode name in | |
316 | Fail (Position(rule,name))) | |
317 | | Ast0.NoMetaPos -> OK binding | |
318 | else OK binding in | |
319 | ||
320 | let match_dots matcher is_list_matcher do_list_match d1 d2 = | |
321 | match (Ast0.unwrap d1, Ast0.unwrap d2) with | |
322 | (Ast0.DOTS(la),Ast0.DOTS(lb)) | |
323 | | (Ast0.CIRCLES(la),Ast0.CIRCLES(lb)) | |
324 | | (Ast0.STARS(la),Ast0.STARS(lb)) -> | |
325 | match_list matcher is_list_matcher (do_list_match d2) la lb | |
326 | | _ -> return false in | |
327 | ||
328 | let is_elist_matcher el = | |
329 | match Ast0.unwrap el with Ast0.MetaExprList(_,_,_) -> true | _ -> false in | |
330 | ||
331 | let is_plist_matcher pl = | |
332 | match Ast0.unwrap pl with Ast0.MetaParamList(_,_,_) -> true | _ -> false in | |
333 | ||
334 | let is_slist_matcher pl = | |
335 | match Ast0.unwrap pl with Ast0.MetaStmtList(_,_) -> true | _ -> false in | |
336 | ||
337 | let no_list _ = false in | |
338 | ||
339 | let build_dots pattern data = | |
340 | match Ast0.unwrap pattern with | |
341 | Ast0.DOTS(_) -> Ast0.rewrap pattern (Ast0.DOTS(data)) | |
342 | | Ast0.CIRCLES(_) -> Ast0.rewrap pattern (Ast0.CIRCLES(data)) | |
343 | | Ast0.STARS(_) -> Ast0.rewrap pattern (Ast0.STARS(data)) in | |
344 | ||
345 | let pure_sp_code = | |
346 | let bind = Ast0.lub_pure in | |
347 | let option_default = Ast0.Context in | |
348 | let pure_mcodekind mc = | |
349 | if !Flag.sgrep_mode2 | |
350 | then Ast0.PureContext | |
351 | else | |
352 | match mc with | |
353 | Ast0.CONTEXT(mc) -> | |
354 | (match !mc with | |
355 | (Ast.NOTHING,_,_) -> Ast0.PureContext | |
356 | | _ -> Ast0.Context) | |
357 | | Ast0.MINUS(mc) -> | |
358 | (match !mc with ([],_) -> Ast0.Pure | _ -> Ast0.Impure) | |
359 | | _ -> Ast0.Impure in | |
360 | let donothing r k e = | |
361 | bind (pure_mcodekind (Ast0.get_mcodekind e)) (k e) in | |
362 | ||
363 | let mcode m = pure_mcodekind (Ast0.get_mcode_mcodekind m) in | |
364 | ||
365 | (* a case for everything that has a metavariable *) | |
366 | (* pure is supposed to match only unitary metavars, not anything that | |
367 | contains only unitary metavars *) | |
368 | let ident r k i = | |
369 | bind (bind (pure_mcodekind (Ast0.get_mcodekind i)) (k i)) | |
370 | (match Ast0.unwrap i with | |
371 | Ast0.MetaId(name,_,pure) | Ast0.MetaFunc(name,_,pure) | |
372 | | Ast0.MetaLocalFunc(name,_,pure) -> pure | |
373 | | _ -> Ast0.Impure) in | |
374 | ||
375 | let expression r k e = | |
376 | bind (bind (pure_mcodekind (Ast0.get_mcodekind e)) (k e)) | |
377 | (match Ast0.unwrap e with | |
378 | Ast0.MetaErr(name,_,pure) | |
379 | | Ast0.MetaExpr(name,_,_,_,pure) | Ast0.MetaExprList(name,_,pure) -> | |
380 | pure | |
381 | | _ -> Ast0.Impure) in | |
382 | ||
383 | let typeC r k t = | |
384 | bind (bind (pure_mcodekind (Ast0.get_mcodekind t)) (k t)) | |
385 | (match Ast0.unwrap t with | |
386 | Ast0.MetaType(name,pure) -> pure | |
387 | | _ -> Ast0.Impure) in | |
388 | ||
389 | let init r k t = | |
390 | bind (bind (pure_mcodekind (Ast0.get_mcodekind t)) (k t)) | |
391 | (match Ast0.unwrap t with | |
392 | Ast0.MetaInit(name,pure) -> pure | |
393 | | _ -> Ast0.Impure) in | |
394 | ||
395 | let param r k p = | |
396 | bind (bind (pure_mcodekind (Ast0.get_mcodekind p)) (k p)) | |
397 | (match Ast0.unwrap p with | |
398 | Ast0.MetaParam(name,pure) | Ast0.MetaParamList(name,_,pure) -> pure | |
399 | | _ -> Ast0.Impure) in | |
400 | ||
401 | let stmt r k s = | |
402 | bind (bind (pure_mcodekind (Ast0.get_mcodekind s)) (k s)) | |
403 | (match Ast0.unwrap s with | |
404 | Ast0.MetaStmt(name,pure) | Ast0.MetaStmtList(name,pure) -> pure | |
405 | | _ -> Ast0.Impure) in | |
406 | ||
407 | V0.combiner bind option_default | |
408 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
409 | donothing donothing donothing donothing donothing donothing | |
410 | ident expression typeC init param donothing stmt donothing | |
411 | donothing in | |
412 | ||
413 | let add_pure_list_binding name pure is_pure builder1 builder2 lst = | |
414 | match (checks_needed,pure) with | |
415 | (true,Ast0.Pure) | (true,Ast0.Context) | (true,Ast0.PureContext) -> | |
416 | (match lst with | |
417 | [x] -> | |
418 | if (Ast0.lub_pure (is_pure x) pure) = pure | |
419 | then add_binding name (builder1 lst) | |
420 | else return_false (NotPure (pure,term name,builder1 lst)) | |
421 | | _ -> return_false (NotPureLength (term name))) | |
422 | | (false,_) | (_,Ast0.Impure) -> add_binding name (builder2 lst) in | |
423 | ||
424 | let add_pure_binding name pure is_pure builder x = | |
425 | match (checks_needed,pure) with | |
426 | (true,Ast0.Pure) | (true,Ast0.Context) | (true,Ast0.PureContext) -> | |
427 | if (Ast0.lub_pure (is_pure x) pure) = pure | |
428 | then add_binding name (builder x) | |
429 | else return_false (NotPure (pure,term name, builder x)) | |
430 | | (false,_) | (_,Ast0.Impure) -> add_binding name (builder x) in | |
431 | ||
432 | let do_elist_match builder el lst = | |
433 | match Ast0.unwrap el with | |
434 | Ast0.MetaExprList(name,lenname,pure) -> | |
435 | (*how to handle lenname? should it be an option type and always None?*) | |
436 | failwith "expr list pattern not supported in iso" | |
437 | (*add_pure_list_binding name pure | |
438 | pure_sp_code.V0.combiner_expression | |
439 | (function lst -> Ast0.ExprTag(List.hd lst)) | |
440 | (function lst -> Ast0.DotsExprTag(build_dots builder lst)) | |
441 | lst*) | |
442 | | _ -> failwith "not possible" in | |
443 | ||
444 | let do_plist_match builder pl lst = | |
445 | match Ast0.unwrap pl with | |
446 | Ast0.MetaParamList(name,lename,pure) -> | |
447 | failwith "param list pattern not supported in iso" | |
448 | (*add_pure_list_binding name pure | |
449 | pure_sp_code.V0.combiner_parameter | |
450 | (function lst -> Ast0.ParamTag(List.hd lst)) | |
451 | (function lst -> Ast0.DotsParamTag(build_dots builder lst)) | |
452 | lst*) | |
453 | | _ -> failwith "not possible" in | |
454 | ||
455 | let do_slist_match builder sl lst = | |
456 | match Ast0.unwrap sl with | |
457 | Ast0.MetaStmtList(name,pure) -> | |
458 | add_pure_list_binding name pure | |
459 | pure_sp_code.V0.combiner_statement | |
460 | (function lst -> Ast0.StmtTag(List.hd lst)) | |
461 | (function lst -> Ast0.DotsStmtTag(build_dots builder lst)) | |
462 | lst | |
463 | | _ -> failwith "not possible" in | |
464 | ||
465 | let do_nolist_match _ _ = failwith "not possible" in | |
466 | ||
467 | let rec match_ident pattern id = | |
468 | match Ast0.unwrap pattern with | |
469 | Ast0.MetaId(name,_,pure) -> | |
470 | (add_pure_binding name pure pure_sp_code.V0.combiner_ident | |
471 | (function id -> Ast0.IdentTag id) id) | |
472 | | Ast0.MetaFunc(name,_,pure) -> failwith "metafunc not supported" | |
473 | | Ast0.MetaLocalFunc(name,_,pure) -> failwith "metalocalfunc not supported" | |
474 | | up -> | |
475 | if not(checks_needed) or not(context_required) or is_context id | |
476 | then | |
477 | match (up,Ast0.unwrap id) with | |
478 | (Ast0.Id(namea),Ast0.Id(nameb)) -> | |
479 | if mcode_equal namea nameb | |
480 | then check_mcode namea nameb | |
481 | else return false | |
482 | | (Ast0.OptIdent(ida),Ast0.OptIdent(idb)) | |
483 | | (Ast0.UniqueIdent(ida),Ast0.UniqueIdent(idb)) -> | |
484 | match_ident ida idb | |
485 | | (_,Ast0.OptIdent(idb)) | |
486 | | (_,Ast0.UniqueIdent(idb)) -> match_ident pattern idb | |
487 | | _ -> return false | |
488 | else return_false (ContextRequired (Ast0.IdentTag id)) in | |
489 | ||
490 | (* should we do something about matching metavars against ...? *) | |
491 | let rec match_expr pattern expr = | |
492 | match Ast0.unwrap pattern with | |
493 | Ast0.MetaExpr(name,_,ty,form,pure) -> | |
494 | let form_ok = | |
495 | match (form,expr) with | |
496 | (Ast.ANY,_) -> true | |
497 | | (Ast.CONST,e) -> | |
498 | let rec matches e = | |
499 | match Ast0.unwrap e with | |
500 | Ast0.Constant(c) -> true | |
501 | | Ast0.Cast(lp,ty,rp,e) -> matches e | |
502 | | Ast0.SizeOfExpr(se,exp) -> true | |
503 | | Ast0.SizeOfType(se,lp,ty,rp) -> true | |
504 | | Ast0.MetaExpr(nm,_,_,Ast.CONST,p) -> | |
505 | (Ast0.lub_pure p pure) = pure | |
506 | | _ -> false in | |
507 | matches e | |
508 | | (Ast.ID,e) | (Ast.LocalID,e) -> | |
509 | let rec matches e = | |
510 | match Ast0.unwrap e with | |
511 | Ast0.Ident(c) -> true | |
512 | | Ast0.Cast(lp,ty,rp,e) -> matches e | |
513 | | Ast0.MetaExpr(nm,_,_,Ast.ID,p) -> | |
514 | (Ast0.lub_pure p pure) = pure | |
515 | | _ -> false in | |
516 | matches e in | |
517 | if form_ok | |
518 | then | |
519 | match ty with | |
520 | Some ts -> | |
521 | if List.exists | |
522 | (function Type_cocci.MetaType(_,_,_) -> true | _ -> false) | |
523 | ts | |
524 | then | |
525 | (match ts with | |
526 | [Type_cocci.MetaType(tyname,_,_)] -> | |
527 | let expty = | |
528 | match (Ast0.unwrap expr,Ast0.get_type expr) with | |
529 | (* easier than updating type inferencer to manage multiple | |
530 | types *) | |
531 | (Ast0.MetaExpr(_,_,Some tts,_,_),_) -> Some tts | |
532 | | (_,Some ty) -> Some [ty] | |
533 | | _ -> None in | |
534 | (match expty with | |
535 | Some expty -> | |
536 | let tyname = Ast0.rewrap_mcode name tyname in | |
537 | conjunct_bindings | |
538 | (add_pure_binding name pure | |
539 | pure_sp_code.V0.combiner_expression | |
540 | (function expr -> Ast0.ExprTag expr) | |
541 | expr) | |
542 | (function bindings -> | |
543 | let attempts = | |
544 | List.map | |
545 | (function expty -> | |
546 | (try | |
547 | add_pure_binding tyname Ast0.Impure | |
548 | (function _ -> Ast0.Impure) | |
549 | (function ty -> Ast0.TypeCTag ty) | |
550 | (Ast0.rewrap expr | |
551 | (Ast0.reverse_type expty)) | |
552 | bindings | |
553 | with Ast0.TyConv -> | |
554 | Printf.printf | |
555 | "warning: unconvertible type"; | |
556 | return false bindings)) | |
557 | expty in | |
558 | if List.exists | |
559 | (function Fail _ -> false | OK x -> true) | |
560 | attempts | |
561 | then | |
562 | (* not sure why this is ok. can there be more | |
563 | than one OK? *) | |
564 | OK (List.concat | |
565 | (List.map | |
566 | (function Fail _ -> [] | OK x -> x) | |
567 | attempts)) | |
568 | else | |
569 | Fail | |
570 | (TypeMatch | |
571 | (List.map | |
572 | (function | |
573 | Fail r -> r | |
574 | | OK x -> failwith "not possible") | |
575 | attempts))) | |
576 | | _ -> | |
577 | (*Printf.printf | |
578 | "warning: type metavar can only match one type";*) | |
579 | return false) | |
580 | | _ -> | |
581 | failwith | |
582 | "mixture of metatype and other types not supported") | |
583 | else | |
584 | let expty = Ast0.get_type expr in | |
585 | if List.exists (function t -> Type_cocci.compatible t expty) ts | |
586 | then | |
587 | add_pure_binding name pure | |
588 | pure_sp_code.V0.combiner_expression | |
589 | (function expr -> Ast0.ExprTag expr) | |
590 | expr | |
591 | else return false | |
592 | | None -> | |
593 | add_pure_binding name pure pure_sp_code.V0.combiner_expression | |
594 | (function expr -> Ast0.ExprTag expr) | |
595 | expr | |
596 | else return false | |
597 | | Ast0.MetaErr(namea,_,pure) -> failwith "metaerr not supported" | |
598 | | Ast0.MetaExprList(_,_,_) -> failwith "metaexprlist not supported" | |
599 | | up -> | |
600 | if not(checks_needed) or not(context_required) or is_context expr | |
601 | then | |
602 | match (up,Ast0.unwrap expr) with | |
603 | (Ast0.Ident(ida),Ast0.Ident(idb)) -> | |
604 | match_ident ida idb | |
605 | | (Ast0.Constant(consta),Ast0.Constant(constb)) -> | |
606 | if mcode_equal consta constb | |
607 | then check_mcode consta constb | |
608 | else return false | |
609 | | (Ast0.FunCall(fna,lp1,argsa,rp1),Ast0.FunCall(fnb,lp,argsb,rp)) -> | |
610 | conjunct_many_bindings | |
611 | [check_mcode lp1 lp; check_mcode rp1 rp; match_expr fna fnb; | |
612 | match_dots match_expr is_elist_matcher do_elist_match | |
613 | argsa argsb] | |
614 | | (Ast0.Assignment(lefta,opa,righta,_), | |
615 | Ast0.Assignment(leftb,opb,rightb,_)) -> | |
616 | if mcode_equal opa opb | |
617 | then | |
618 | conjunct_many_bindings | |
619 | [check_mcode opa opb; match_expr lefta leftb; | |
620 | match_expr righta rightb] | |
621 | else return false | |
622 | | (Ast0.CondExpr(exp1a,lp1,exp2a,rp1,exp3a), | |
623 | Ast0.CondExpr(exp1b,lp,exp2b,rp,exp3b)) -> | |
624 | conjunct_many_bindings | |
625 | [check_mcode lp1 lp; check_mcode rp1 rp; | |
626 | match_expr exp1a exp1b; match_option match_expr exp2a exp2b; | |
627 | match_expr exp3a exp3b] | |
628 | | (Ast0.Postfix(expa,opa),Ast0.Postfix(expb,opb)) -> | |
629 | if mcode_equal opa opb | |
630 | then | |
631 | conjunct_bindings (check_mcode opa opb) (match_expr expa expb) | |
632 | else return false | |
633 | | (Ast0.Infix(expa,opa),Ast0.Infix(expb,opb)) -> | |
634 | if mcode_equal opa opb | |
635 | then | |
636 | conjunct_bindings (check_mcode opa opb) (match_expr expa expb) | |
637 | else return false | |
638 | | (Ast0.Unary(expa,opa),Ast0.Unary(expb,opb)) -> | |
639 | if mcode_equal opa opb | |
640 | then | |
641 | conjunct_bindings (check_mcode opa opb) (match_expr expa expb) | |
642 | else return false | |
643 | | (Ast0.Binary(lefta,opa,righta),Ast0.Binary(leftb,opb,rightb)) -> | |
644 | if mcode_equal opa opb | |
645 | then | |
646 | conjunct_many_bindings | |
647 | [check_mcode opa opb; match_expr lefta leftb; | |
648 | match_expr righta rightb] | |
649 | else return false | |
650 | | (Ast0.Paren(lp1,expa,rp1),Ast0.Paren(lp,expb,rp)) -> | |
651 | conjunct_many_bindings | |
652 | [check_mcode lp1 lp; check_mcode rp1 rp; match_expr expa expb] | |
653 | | (Ast0.ArrayAccess(exp1a,lb1,exp2a,rb1), | |
654 | Ast0.ArrayAccess(exp1b,lb,exp2b,rb)) -> | |
655 | conjunct_many_bindings | |
656 | [check_mcode lb1 lb; check_mcode rb1 rb; | |
657 | match_expr exp1a exp1b; match_expr exp2a exp2b] | |
658 | | (Ast0.RecordAccess(expa,opa,fielda), | |
659 | Ast0.RecordAccess(expb,op,fieldb)) | |
660 | | (Ast0.RecordPtAccess(expa,opa,fielda), | |
661 | Ast0.RecordPtAccess(expb,op,fieldb)) -> | |
662 | conjunct_many_bindings | |
663 | [check_mcode opa op; match_expr expa expb; | |
664 | match_ident fielda fieldb] | |
665 | | (Ast0.Cast(lp1,tya,rp1,expa),Ast0.Cast(lp,tyb,rp,expb)) -> | |
666 | conjunct_many_bindings | |
667 | [check_mcode lp1 lp; check_mcode rp1 rp; | |
668 | match_typeC tya tyb; match_expr expa expb] | |
669 | | (Ast0.SizeOfExpr(szf1,expa),Ast0.SizeOfExpr(szf,expb)) -> | |
670 | conjunct_bindings (check_mcode szf1 szf) (match_expr expa expb) | |
671 | | (Ast0.SizeOfType(szf1,lp1,tya,rp1), | |
672 | Ast0.SizeOfType(szf,lp,tyb,rp)) -> | |
673 | conjunct_many_bindings | |
674 | [check_mcode lp1 lp; check_mcode rp1 rp; | |
675 | check_mcode szf1 szf; match_typeC tya tyb] | |
676 | | (Ast0.TypeExp(tya),Ast0.TypeExp(tyb)) -> | |
677 | match_typeC tya tyb | |
678 | | (Ast0.EComma(cm1),Ast0.EComma(cm)) -> check_mcode cm1 cm | |
679 | | (Ast0.DisjExpr(_,expsa,_,_),_) -> | |
680 | failwith "not allowed in the pattern of an isomorphism" | |
681 | | (Ast0.NestExpr(_,exp_dotsa,_,_,_),_) -> | |
682 | failwith "not allowed in the pattern of an isomorphism" | |
683 | | (Ast0.Edots(d,None),Ast0.Edots(d1,None)) | |
684 | | (Ast0.Ecircles(d,None),Ast0.Ecircles(d1,None)) | |
685 | | (Ast0.Estars(d,None),Ast0.Estars(d1,None)) -> check_mcode d d1 | |
686 | | (Ast0.Edots(ed,None),Ast0.Edots(ed1,Some wc)) | |
687 | | (Ast0.Ecircles(ed,None),Ast0.Ecircles(ed1,Some wc)) | |
688 | | (Ast0.Estars(ed,None),Ast0.Estars(ed1,Some wc)) -> | |
689 | (* hope that mcode of edots is unique somehow *) | |
690 | conjunct_bindings (check_mcode ed ed1) | |
691 | (let (edots_whencode_allowed,_,_) = whencode_allowed in | |
692 | if edots_whencode_allowed | |
693 | then add_dot_binding ed (Ast0.ExprTag wc) | |
694 | else | |
695 | (Printf.printf | |
696 | "warning: not applying iso because of whencode"; | |
697 | return false)) | |
698 | | (Ast0.Edots(_,Some _),_) | (Ast0.Ecircles(_,Some _),_) | |
699 | | (Ast0.Estars(_,Some _),_) -> | |
700 | failwith "whencode not allowed in a pattern1" | |
701 | | (Ast0.OptExp(expa),Ast0.OptExp(expb)) | |
702 | | (Ast0.UniqueExp(expa),Ast0.UniqueExp(expb)) -> match_expr expa expb | |
703 | | (_,Ast0.OptExp(expb)) | |
704 | | (_,Ast0.UniqueExp(expb)) -> match_expr pattern expb | |
705 | | _ -> return false | |
706 | else return_false (ContextRequired (Ast0.ExprTag expr)) | |
707 | ||
708 | (* the special case for function types prevents the eg T X; -> T X = E; iso | |
709 | from applying, which doesn't seem very relevant, but it also avoids a | |
710 | mysterious bug that is obtained with eg int attach(...); *) | |
711 | and match_typeC pattern t = | |
712 | match Ast0.unwrap pattern with | |
713 | Ast0.MetaType(name,pure) -> | |
714 | (match Ast0.unwrap t with | |
715 | Ast0.FunctionType(tya,lp1a,paramsa,rp1a) -> return false | |
716 | | _ -> | |
717 | add_pure_binding name pure pure_sp_code.V0.combiner_typeC | |
718 | (function ty -> Ast0.TypeCTag ty) | |
719 | t) | |
720 | | up -> | |
721 | if not(checks_needed) or not(context_required) or is_context t | |
722 | then | |
723 | match (up,Ast0.unwrap t) with | |
724 | (Ast0.ConstVol(cva,tya),Ast0.ConstVol(cvb,tyb)) -> | |
725 | if mcode_equal cva cvb | |
726 | then | |
727 | conjunct_bindings (check_mcode cva cvb) (match_typeC tya tyb) | |
728 | else return false | |
729 | | (Ast0.BaseType(tya,stringsa),Ast0.BaseType(tyb,stringsb)) -> | |
730 | if tya = tyb | |
731 | then | |
732 | match_list check_mcode | |
733 | (function _ -> false) (function _ -> failwith "") | |
734 | stringsa stringsb | |
735 | else return false | |
736 | | (Ast0.Signed(signa,tya),Ast0.Signed(signb,tyb)) -> | |
737 | if mcode_equal signa signb | |
738 | then | |
739 | conjunct_bindings (check_mcode signa signb) | |
740 | (match_option match_typeC tya tyb) | |
741 | else return false | |
742 | | (Ast0.Pointer(tya,star1),Ast0.Pointer(tyb,star)) -> | |
743 | conjunct_bindings (check_mcode star1 star) (match_typeC tya tyb) | |
744 | | (Ast0.FunctionPointer(tya,lp1a,stara,rp1a,lp2a,paramsa,rp2a), | |
745 | Ast0.FunctionPointer(tyb,lp1b,starb,rp1b,lp2b,paramsb,rp2b)) -> | |
746 | conjunct_many_bindings | |
747 | [check_mcode stara starb; check_mcode lp1a lp1b; | |
748 | check_mcode rp1a rp1b; check_mcode lp2a lp2b; | |
749 | check_mcode rp2a rp2b; match_typeC tya tyb; | |
750 | match_dots match_param is_plist_matcher | |
751 | do_plist_match paramsa paramsb] | |
752 | | (Ast0.FunctionType(tya,lp1a,paramsa,rp1a), | |
753 | Ast0.FunctionType(tyb,lp1b,paramsb,rp1b)) -> | |
754 | conjunct_many_bindings | |
755 | [check_mcode lp1a lp1b; check_mcode rp1a rp1b; | |
756 | match_option match_typeC tya tyb; | |
757 | match_dots match_param is_plist_matcher do_plist_match | |
758 | paramsa paramsb] | |
759 | | (Ast0.Array(tya,lb1,sizea,rb1),Ast0.Array(tyb,lb,sizeb,rb)) -> | |
760 | conjunct_many_bindings | |
761 | [check_mcode lb1 lb; check_mcode rb1 rb; | |
762 | match_typeC tya tyb; match_option match_expr sizea sizeb] | |
763 | | (Ast0.EnumName(kinda,namea),Ast0.EnumName(kindb,nameb)) -> | |
764 | conjunct_bindings (check_mcode kinda kindb) | |
765 | (match_ident namea nameb) | |
766 | | (Ast0.StructUnionName(kinda,Some namea), | |
767 | Ast0.StructUnionName(kindb,Some nameb)) -> | |
768 | if mcode_equal kinda kindb | |
769 | then | |
770 | conjunct_bindings (check_mcode kinda kindb) | |
771 | (match_ident namea nameb) | |
772 | else return false | |
773 | | (Ast0.StructUnionDef(tya,lb1,declsa,rb1), | |
774 | Ast0.StructUnionDef(tyb,lb,declsb,rb)) -> | |
775 | conjunct_many_bindings | |
776 | [check_mcode lb1 lb; check_mcode rb1 rb; | |
777 | match_typeC tya tyb; | |
778 | match_dots match_decl no_list do_nolist_match declsa declsb] | |
779 | | (Ast0.TypeName(namea),Ast0.TypeName(nameb)) -> | |
780 | if mcode_equal namea nameb | |
781 | then check_mcode namea nameb | |
782 | else return false | |
783 | | (Ast0.DisjType(_,typesa,_,_),Ast0.DisjType(_,typesb,_,_)) -> | |
784 | failwith "not allowed in the pattern of an isomorphism" | |
785 | | (Ast0.OptType(tya),Ast0.OptType(tyb)) | |
786 | | (Ast0.UniqueType(tya),Ast0.UniqueType(tyb)) -> match_typeC tya tyb | |
787 | | (_,Ast0.OptType(tyb)) | |
788 | | (_,Ast0.UniqueType(tyb)) -> match_typeC pattern tyb | |
789 | | _ -> return false | |
790 | else return_false (ContextRequired (Ast0.TypeCTag t)) | |
791 | ||
792 | and match_decl pattern d = | |
793 | if not(checks_needed) or not(context_required) or is_context d | |
794 | then | |
795 | match (Ast0.unwrap pattern,Ast0.unwrap d) with | |
796 | (Ast0.Init(stga,tya,ida,eq1,inia,sc1), | |
797 | Ast0.Init(stgb,tyb,idb,eq,inib,sc)) -> | |
798 | if bool_match_option mcode_equal stga stgb | |
799 | then | |
800 | conjunct_many_bindings | |
801 | [check_mcode eq1 eq; check_mcode sc1 sc; | |
802 | match_option check_mcode stga stgb; | |
803 | match_typeC tya tyb; match_ident ida idb; | |
804 | match_init inia inib] | |
805 | else return false | |
806 | | (Ast0.UnInit(stga,tya,ida,sc1),Ast0.UnInit(stgb,tyb,idb,sc)) -> | |
807 | if bool_match_option mcode_equal stga stgb | |
808 | then | |
809 | conjunct_many_bindings | |
810 | [check_mcode sc1 sc; match_option check_mcode stga stgb; | |
811 | match_typeC tya tyb; match_ident ida idb] | |
812 | else return false | |
813 | | (Ast0.MacroDecl(namea,lp1,argsa,rp1,sc1), | |
814 | Ast0.MacroDecl(nameb,lp,argsb,rp,sc)) -> | |
815 | conjunct_many_bindings | |
816 | [match_ident namea nameb; | |
817 | check_mcode lp1 lp; check_mcode rp1 rp; | |
818 | check_mcode sc1 sc; | |
819 | match_dots match_expr is_elist_matcher do_elist_match | |
820 | argsa argsb] | |
821 | | (Ast0.TyDecl(tya,sc1),Ast0.TyDecl(tyb,sc)) -> | |
822 | conjunct_bindings (check_mcode sc1 sc) (match_typeC tya tyb) | |
823 | | (Ast0.Typedef(stga,tya,ida,sc1),Ast0.Typedef(stgb,tyb,idb,sc)) -> | |
824 | conjunct_bindings (check_mcode sc1 sc) | |
825 | (conjunct_bindings (match_typeC tya tyb) (match_typeC ida idb)) | |
826 | | (Ast0.DisjDecl(_,declsa,_,_),Ast0.DisjDecl(_,declsb,_,_)) -> | |
827 | failwith "not allowed in the pattern of an isomorphism" | |
828 | | (Ast0.Ddots(d1,None),Ast0.Ddots(d,None)) -> check_mcode d1 d | |
829 | | (Ast0.Ddots(dd,None),Ast0.Ddots(d,Some wc)) -> | |
830 | conjunct_bindings (check_mcode dd d) | |
831 | (* hope that mcode of ddots is unique somehow *) | |
832 | (let (ddots_whencode_allowed,_,_) = whencode_allowed in | |
833 | if ddots_whencode_allowed | |
834 | then add_dot_binding dd (Ast0.DeclTag wc) | |
835 | else | |
836 | (Printf.printf "warning: not applying iso because of whencode"; | |
837 | return false)) | |
838 | | (Ast0.Ddots(_,Some _),_) -> | |
839 | failwith "whencode not allowed in a pattern1" | |
840 | ||
841 | | (Ast0.OptDecl(decla),Ast0.OptDecl(declb)) | |
842 | | (Ast0.UniqueDecl(decla),Ast0.UniqueDecl(declb)) -> | |
843 | match_decl decla declb | |
844 | | (_,Ast0.OptDecl(declb)) | |
845 | | (_,Ast0.UniqueDecl(declb)) -> | |
846 | match_decl pattern declb | |
847 | | _ -> return false | |
848 | else return_false (ContextRequired (Ast0.DeclTag d)) | |
849 | ||
850 | and match_init pattern i = | |
851 | match Ast0.unwrap pattern with | |
852 | Ast0.MetaInit(name,pure) -> | |
853 | add_pure_binding name pure pure_sp_code.V0.combiner_initialiser | |
854 | (function ini -> Ast0.InitTag ini) | |
855 | i | |
856 | | up -> | |
857 | if not(checks_needed) or not(context_required) or is_context i | |
858 | then | |
859 | match (up,Ast0.unwrap i) with | |
860 | (Ast0.InitExpr(expa),Ast0.InitExpr(expb)) -> | |
861 | match_expr expa expb | |
862 | | (Ast0.InitList(lb1,initlista,rb1),Ast0.InitList(lb,initlistb,rb)) | |
863 | -> | |
864 | conjunct_many_bindings | |
865 | [check_mcode lb1 lb; check_mcode rb1 rb; | |
866 | match_dots match_init no_list do_nolist_match | |
867 | initlista initlistb] | |
868 | | (Ast0.InitGccExt(designators1,e1,inia), | |
869 | Ast0.InitGccExt(designators2,e2,inib)) -> | |
870 | conjunct_many_bindings | |
871 | [match_list match_designator | |
872 | (function _ -> false) (function _ -> failwith "") | |
873 | designators1 designators2; | |
874 | check_mcode e1 e2; | |
875 | match_init inia inib] | |
876 | | (Ast0.InitGccName(namea,c1,inia),Ast0.InitGccName(nameb,c,inib)) -> | |
877 | conjunct_many_bindings | |
878 | [check_mcode c1 c; match_ident namea nameb; | |
879 | match_init inia inib] | |
880 | | (Ast0.IComma(c1),Ast0.IComma(c)) -> check_mcode c1 c | |
881 | | (Ast0.Idots(d1,None),Ast0.Idots(d,None)) -> check_mcode d1 d | |
882 | | (Ast0.Idots(id,None),Ast0.Idots(d,Some wc)) -> | |
883 | conjunct_bindings (check_mcode id d) | |
884 | (* hope that mcode of edots is unique somehow *) | |
885 | (let (_,idots_whencode_allowed,_) = whencode_allowed in | |
886 | if idots_whencode_allowed | |
887 | then add_dot_binding id (Ast0.InitTag wc) | |
888 | else | |
889 | (Printf.printf | |
890 | "warning: not applying iso because of whencode"; | |
891 | return false)) | |
892 | | (Ast0.Idots(_,Some _),_) -> | |
893 | failwith "whencode not allowed in a pattern2" | |
894 | | (Ast0.OptIni(ia),Ast0.OptIni(ib)) | |
895 | | (Ast0.UniqueIni(ia),Ast0.UniqueIni(ib)) -> match_init ia ib | |
896 | | (_,Ast0.OptIni(ib)) | |
897 | | (_,Ast0.UniqueIni(ib)) -> match_init pattern ib | |
898 | | _ -> return false | |
899 | else return_false (ContextRequired (Ast0.InitTag i)) | |
900 | ||
901 | and match_designator pattern d = | |
902 | match (pattern,d) with | |
903 | (Ast0.DesignatorField(dota,ida),Ast0.DesignatorField(dotb,idb)) -> | |
904 | conjunct_bindings (check_mcode dota dotb) (match_ident ida idb) | |
905 | | (Ast0.DesignatorIndex(lba,expa,rba), | |
906 | Ast0.DesignatorIndex(lbb,expb,rbb)) -> | |
907 | conjunct_many_bindings | |
908 | [check_mcode lba lbb; match_expr expa expb; | |
909 | check_mcode rba rbb] | |
910 | | (Ast0.DesignatorRange(lba,mina,dotsa,maxa,rba), | |
911 | Ast0.DesignatorRange(lbb,minb,dotsb,maxb,rbb)) -> | |
912 | conjunct_many_bindings | |
913 | [check_mcode lba lbb; match_expr mina minb; | |
914 | check_mcode dotsa dotsb; match_expr maxa maxb; | |
915 | check_mcode rba rbb] | |
916 | | _ -> return false | |
917 | ||
918 | and match_param pattern p = | |
919 | match Ast0.unwrap pattern with | |
920 | Ast0.MetaParam(name,pure) -> | |
921 | add_pure_binding name pure pure_sp_code.V0.combiner_parameter | |
922 | (function p -> Ast0.ParamTag p) | |
923 | p | |
924 | | Ast0.MetaParamList(name,_,pure) -> failwith "metaparamlist not supported" | |
925 | | up -> | |
926 | if not(checks_needed) or not(context_required) or is_context p | |
927 | then | |
928 | match (up,Ast0.unwrap p) with | |
929 | (Ast0.VoidParam(tya),Ast0.VoidParam(tyb)) -> match_typeC tya tyb | |
930 | | (Ast0.Param(tya,ida),Ast0.Param(tyb,idb)) -> | |
931 | conjunct_bindings (match_typeC tya tyb) | |
932 | (match_option match_ident ida idb) | |
933 | | (Ast0.PComma(c1),Ast0.PComma(c)) -> check_mcode c1 c | |
934 | | (Ast0.Pdots(d1),Ast0.Pdots(d)) | |
935 | | (Ast0.Pcircles(d1),Ast0.Pcircles(d)) -> check_mcode d1 d | |
936 | | (Ast0.OptParam(parama),Ast0.OptParam(paramb)) | |
937 | | (Ast0.UniqueParam(parama),Ast0.UniqueParam(paramb)) -> | |
938 | match_param parama paramb | |
939 | | (_,Ast0.OptParam(paramb)) | |
940 | | (_,Ast0.UniqueParam(paramb)) -> match_param pattern paramb | |
941 | | _ -> return false | |
942 | else return_false (ContextRequired (Ast0.ParamTag p)) | |
943 | ||
944 | and match_statement pattern s = | |
945 | match Ast0.unwrap pattern with | |
946 | Ast0.MetaStmt(name,pure) -> | |
947 | (match Ast0.unwrap s with | |
948 | Ast0.Dots(_,_) | Ast0.Circles(_,_) | Ast0.Stars(_,_) -> | |
949 | return false (* ... is not a single statement *) | |
950 | | _ -> | |
951 | add_pure_binding name pure pure_sp_code.V0.combiner_statement | |
952 | (function ty -> Ast0.StmtTag ty) | |
953 | s) | |
954 | | Ast0.MetaStmtList(name,pure) -> failwith "metastmtlist not supported" | |
955 | | up -> | |
956 | if not(checks_needed) or not(context_required) or is_context s | |
957 | then | |
958 | match (up,Ast0.unwrap s) with | |
959 | (Ast0.FunDecl(_,fninfoa,namea,lp1,paramsa,rp1,lb1,bodya,rb1), | |
960 | Ast0.FunDecl(_,fninfob,nameb,lp,paramsb,rp,lb,bodyb,rb)) -> | |
961 | conjunct_many_bindings | |
962 | [check_mcode lp1 lp; check_mcode rp1 rp; | |
963 | check_mcode lb1 lb; check_mcode rb1 rb; | |
964 | match_fninfo fninfoa fninfob; match_ident namea nameb; | |
965 | match_dots match_param is_plist_matcher do_plist_match | |
966 | paramsa paramsb; | |
967 | match_dots match_statement is_slist_matcher do_slist_match | |
968 | bodya bodyb] | |
969 | | (Ast0.Decl(_,decla),Ast0.Decl(_,declb)) -> | |
970 | match_decl decla declb | |
971 | | (Ast0.Seq(lb1,bodya,rb1),Ast0.Seq(lb,bodyb,rb)) -> | |
972 | (* seqs can only match if they are all minus (plus code | |
973 | allowed) or all context (plus code not allowed in the body). | |
974 | we could be more permissive if the expansions of the isos are | |
975 | also all seqs, but this would be hard to check except at top | |
976 | level, and perhaps not worth checking even in that case. | |
977 | Overall, the issue is that braces are used where single | |
978 | statements are required, and something not satisfying these | |
979 | conditions can cause a single statement to become a | |
980 | non-single statement after the transformation. | |
981 | ||
982 | example: if { ... -foo(); ... } | |
983 | if we let the sequence convert to just -foo(); | |
984 | then we produce invalid code. For some reason, | |
985 | single_statement can't deal with this case, perhaps because | |
986 | it starts introducing too many braces? don't remember the | |
987 | exact problem... | |
988 | *) | |
989 | conjunct_bindings (check_mcode lb1 lb) | |
990 | (conjunct_bindings (check_mcode rb1 rb) | |
991 | (if not(checks_needed) or is_minus s or | |
992 | (is_context s && | |
993 | List.for_all is_pure_context (Ast0.undots bodyb)) | |
994 | then | |
995 | match_dots match_statement is_slist_matcher do_slist_match | |
996 | bodya bodyb | |
997 | else return_false (Braces(s)))) | |
998 | | (Ast0.ExprStatement(expa,sc1),Ast0.ExprStatement(expb,sc)) -> | |
999 | conjunct_bindings (check_mcode sc1 sc) (match_expr expa expb) | |
1000 | | (Ast0.IfThen(if1,lp1,expa,rp1,branch1a,_), | |
1001 | Ast0.IfThen(if2,lp2,expb,rp2,branch1b,_)) -> | |
1002 | conjunct_many_bindings | |
1003 | [check_mcode if1 if2; check_mcode lp1 lp2; | |
1004 | check_mcode rp1 rp2; | |
1005 | match_expr expa expb; | |
1006 | match_statement branch1a branch1b] | |
1007 | | (Ast0.IfThenElse(if1,lp1,expa,rp1,branch1a,e1,branch2a,_), | |
1008 | Ast0.IfThenElse(if2,lp2,expb,rp2,branch1b,e2,branch2b,_)) -> | |
1009 | conjunct_many_bindings | |
1010 | [check_mcode if1 if2; check_mcode lp1 lp2; | |
1011 | check_mcode rp1 rp2; check_mcode e1 e2; | |
1012 | match_expr expa expb; | |
1013 | match_statement branch1a branch1b; | |
1014 | match_statement branch2a branch2b] | |
1015 | | (Ast0.While(w1,lp1,expa,rp1,bodya,_), | |
1016 | Ast0.While(w,lp,expb,rp,bodyb,_)) -> | |
1017 | conjunct_many_bindings | |
1018 | [check_mcode w1 w; check_mcode lp1 lp; | |
1019 | check_mcode rp1 rp; match_expr expa expb; | |
1020 | match_statement bodya bodyb] | |
1021 | | (Ast0.Do(d1,bodya,w1,lp1,expa,rp1,_), | |
1022 | Ast0.Do(d,bodyb,w,lp,expb,rp,_)) -> | |
1023 | conjunct_many_bindings | |
1024 | [check_mcode d1 d; check_mcode w1 w; check_mcode lp1 lp; | |
1025 | check_mcode rp1 rp; match_statement bodya bodyb; | |
1026 | match_expr expa expb] | |
1027 | | (Ast0.For(f1,lp1,e1a,sc1a,e2a,sc2a,e3a,rp1,bodya,_), | |
1028 | Ast0.For(f,lp,e1b,sc1b,e2b,sc2b,e3b,rp,bodyb,_)) -> | |
1029 | conjunct_many_bindings | |
1030 | [check_mcode f1 f; check_mcode lp1 lp; check_mcode sc1a sc1b; | |
1031 | check_mcode sc2a sc2b; check_mcode rp1 rp; | |
1032 | match_option match_expr e1a e1b; | |
1033 | match_option match_expr e2a e2b; | |
1034 | match_option match_expr e3a e3b; | |
1035 | match_statement bodya bodyb] | |
1036 | | (Ast0.Iterator(nma,lp1,argsa,rp1,bodya,_), | |
1037 | Ast0.Iterator(nmb,lp,argsb,rp,bodyb,_)) -> | |
1038 | conjunct_many_bindings | |
1039 | [match_ident nma nmb; | |
1040 | check_mcode lp1 lp; check_mcode rp1 rp; | |
1041 | match_dots match_expr is_elist_matcher do_elist_match | |
1042 | argsa argsb; | |
1043 | match_statement bodya bodyb] | |
1044 | | (Ast0.Switch(s1,lp1,expa,rp1,lb1,casesa,rb1), | |
1045 | Ast0.Switch(s,lp,expb,rp,lb,casesb,rb)) -> | |
1046 | conjunct_many_bindings | |
1047 | [check_mcode s1 s; check_mcode lp1 lp; check_mcode rp1 rp; | |
1048 | check_mcode lb1 lb; check_mcode rb1 rb; | |
1049 | match_expr expa expb; | |
1050 | match_dots match_case_line no_list do_nolist_match | |
1051 | casesa casesb] | |
1052 | | (Ast0.Break(b1,sc1),Ast0.Break(b,sc)) | |
1053 | | (Ast0.Continue(b1,sc1),Ast0.Continue(b,sc)) -> | |
1054 | conjunct_bindings (check_mcode b1 b) (check_mcode sc1 sc) | |
1055 | | (Ast0.Label(l1,c1),Ast0.Label(l2,c)) -> | |
1056 | conjunct_bindings (match_ident l1 l2) (check_mcode c1 c) | |
1057 | | (Ast0.Goto(g1,l1,sc1),Ast0.Goto(g,l2,sc)) -> | |
1058 | conjunct_many_bindings | |
1059 | [check_mcode g1 g; check_mcode sc1 sc; match_ident l1 l2] | |
1060 | | (Ast0.Return(r1,sc1),Ast0.Return(r,sc)) -> | |
1061 | conjunct_bindings (check_mcode r1 r) (check_mcode sc1 sc) | |
1062 | | (Ast0.ReturnExpr(r1,expa,sc1),Ast0.ReturnExpr(r,expb,sc)) -> | |
1063 | conjunct_many_bindings | |
1064 | [check_mcode r1 r; check_mcode sc1 sc; match_expr expa expb] | |
1065 | | (Ast0.Disj(_,statement_dots_lista,_,_),_) -> | |
1066 | failwith "disj not supported in patterns" | |
1067 | | (Ast0.Nest(_,stmt_dotsa,_,_,_),_) -> | |
1068 | failwith "nest not supported in patterns" | |
1069 | | (Ast0.Exp(expa),Ast0.Exp(expb)) -> match_expr expa expb | |
1070 | | (Ast0.TopExp(expa),Ast0.TopExp(expb)) -> match_expr expa expb | |
1071 | | (Ast0.Exp(expa),Ast0.TopExp(expb)) -> match_expr expa expb | |
1072 | | (Ast0.TopInit(inita),Ast0.TopInit(initb)) -> match_init inita initb | |
1073 | | (Ast0.Ty(tya),Ast0.Ty(tyb)) -> match_typeC tya tyb | |
1074 | | (Ast0.Dots(d,[]),Ast0.Dots(d1,wc)) | |
1075 | | (Ast0.Circles(d,[]),Ast0.Circles(d1,wc)) | |
1076 | | (Ast0.Stars(d,[]),Ast0.Stars(d1,wc)) -> | |
1077 | (match wc with | |
1078 | [] -> check_mcode d d1 | |
1079 | | _ -> | |
1080 | let (_,_,dots_whencode_allowed) = whencode_allowed in | |
1081 | if dots_whencode_allowed | |
1082 | then | |
1083 | conjunct_bindings (check_mcode d d1) | |
1084 | (List.fold_left | |
1085 | (function prev -> | |
1086 | function | |
1087 | | Ast0.WhenNot wc -> | |
1088 | conjunct_bindings prev | |
1089 | (add_multi_dot_binding d | |
1090 | (Ast0.DotsStmtTag wc)) | |
1091 | | Ast0.WhenAlways wc -> | |
1092 | conjunct_bindings prev | |
1093 | (add_multi_dot_binding d (Ast0.StmtTag wc)) | |
1094 | | Ast0.WhenNotTrue wc -> | |
1095 | conjunct_bindings prev | |
1096 | (add_multi_dot_binding d | |
1097 | (Ast0.IsoWhenTTag wc)) | |
1098 | | Ast0.WhenNotFalse wc -> | |
1099 | conjunct_bindings prev | |
1100 | (add_multi_dot_binding d | |
1101 | (Ast0.IsoWhenFTag wc)) | |
1102 | | Ast0.WhenModifier(x) -> | |
1103 | conjunct_bindings prev | |
1104 | (add_multi_dot_binding d | |
1105 | (Ast0.IsoWhenTag x))) | |
1106 | (return true) wc) | |
1107 | else | |
1108 | (Printf.printf | |
1109 | "warning: not applying iso because of whencode"; | |
1110 | return false)) | |
1111 | | (Ast0.Dots(_,_::_),_) | (Ast0.Circles(_,_::_),_) | |
1112 | | (Ast0.Stars(_,_::_),_) -> | |
1113 | failwith "whencode not allowed in a pattern3" | |
1114 | | (Ast0.OptStm(rea),Ast0.OptStm(reb)) | |
1115 | | (Ast0.UniqueStm(rea),Ast0.UniqueStm(reb)) -> | |
1116 | match_statement rea reb | |
1117 | | (_,Ast0.OptStm(reb)) | |
1118 | | (_,Ast0.UniqueStm(reb)) -> match_statement pattern reb | |
1119 | | _ -> return false | |
1120 | else return_false (ContextRequired (Ast0.StmtTag s)) | |
1121 | ||
1122 | (* first should provide a subset of the information in the second *) | |
1123 | and match_fninfo patterninfo cinfo = | |
1124 | let patterninfo = List.sort compare patterninfo in | |
1125 | let cinfo = List.sort compare cinfo in | |
1126 | let rec loop = function | |
1127 | (Ast0.FStorage(sta)::resta,Ast0.FStorage(stb)::restb) -> | |
1128 | if mcode_equal sta stb | |
1129 | then conjunct_bindings (check_mcode sta stb) (loop (resta,restb)) | |
1130 | else return false | |
1131 | | (Ast0.FType(tya)::resta,Ast0.FType(tyb)::restb) -> | |
1132 | conjunct_bindings (match_typeC tya tyb) (loop (resta,restb)) | |
1133 | | (Ast0.FInline(ia)::resta,Ast0.FInline(ib)::restb) -> | |
1134 | if mcode_equal ia ib | |
1135 | then conjunct_bindings (check_mcode ia ib) (loop (resta,restb)) | |
1136 | else return false | |
1137 | | (Ast0.FAttr(ia)::resta,Ast0.FAttr(ib)::restb) -> | |
1138 | if mcode_equal ia ib | |
1139 | then conjunct_bindings (check_mcode ia ib) (loop (resta,restb)) | |
1140 | else return false | |
1141 | | (x::resta,((y::_) as restb)) -> | |
1142 | (match compare x y with | |
1143 | -1 -> return false | |
1144 | | 1 -> loop (resta,restb) | |
1145 | | _ -> failwith "not possible") | |
1146 | | _ -> return false in | |
1147 | loop (patterninfo,cinfo) | |
1148 | ||
1149 | and match_case_line pattern c = | |
1150 | if not(checks_needed) or not(context_required) or is_context c | |
1151 | then | |
1152 | match (Ast0.unwrap pattern,Ast0.unwrap c) with | |
1153 | (Ast0.Default(d1,c1,codea),Ast0.Default(d,c,codeb)) -> | |
1154 | conjunct_many_bindings | |
1155 | [check_mcode d1 d; check_mcode c1 c; | |
1156 | match_dots match_statement is_slist_matcher do_slist_match | |
1157 | codea codeb] | |
1158 | | (Ast0.Case(ca1,expa,c1,codea),Ast0.Case(ca,expb,c,codeb)) -> | |
1159 | conjunct_many_bindings | |
1160 | [check_mcode ca1 ca; check_mcode c1 c; match_expr expa expb; | |
1161 | match_dots match_statement is_slist_matcher do_slist_match | |
1162 | codea codeb] | |
1163 | | (Ast0.OptCase(ca),Ast0.OptCase(cb)) -> match_case_line ca cb | |
1164 | | (_,Ast0.OptCase(cb)) -> match_case_line pattern cb | |
1165 | | _ -> return false | |
1166 | else return_false (ContextRequired (Ast0.CaseLineTag c)) in | |
1167 | ||
1168 | let match_statement_dots x y = | |
1169 | match_dots match_statement is_slist_matcher do_slist_match x y in | |
1170 | ||
1171 | (match_expr, match_decl, match_statement, match_typeC, | |
1172 | match_statement_dots) | |
1173 | ||
1174 | let match_expr dochecks context_required whencode_allowed = | |
1175 | let (fn,_,_,_,_) = match_maker dochecks context_required whencode_allowed in | |
1176 | fn | |
1177 | ||
1178 | let match_decl dochecks context_required whencode_allowed = | |
1179 | let (_,fn,_,_,_) = match_maker dochecks context_required whencode_allowed in | |
1180 | fn | |
1181 | ||
1182 | let match_statement dochecks context_required whencode_allowed = | |
1183 | let (_,_,fn,_,_) = match_maker dochecks context_required whencode_allowed in | |
1184 | fn | |
1185 | ||
1186 | let match_typeC dochecks context_required whencode_allowed = | |
1187 | let (_,_,_,fn,_) = match_maker dochecks context_required whencode_allowed in | |
1188 | fn | |
1189 | ||
1190 | let match_statement_dots dochecks context_required whencode_allowed = | |
1191 | let (_,_,_,_,fn) = match_maker dochecks context_required whencode_allowed in | |
1192 | fn | |
1193 | ||
1194 | (* --------------------------------------------------------------------- *) | |
1195 | (* make an entire tree MINUS *) | |
1196 | ||
1197 | let make_minus = | |
1198 | let mcode (term,arity,info,mcodekind,pos) = | |
1199 | let new_mcodekind = | |
1200 | match mcodekind with | |
1201 | Ast0.CONTEXT(mc) -> | |
1202 | (match !mc with | |
1203 | (Ast.NOTHING,_,_) -> Ast0.MINUS(ref([],Ast0.default_token_info)) | |
1204 | | _ -> failwith "make_minus: unexpected befaft") | |
1205 | | Ast0.MINUS(mc) -> mcodekind (* in the part copied from the src term *) | |
1206 | | _ -> failwith "make_minus mcode: unexpected mcodekind" in | |
1207 | (term,arity,info,new_mcodekind,pos) in | |
1208 | ||
1209 | let update_mc mcodekind e = | |
1210 | match !mcodekind with | |
1211 | Ast0.CONTEXT(mc) -> | |
1212 | (match !mc with | |
1213 | (Ast.NOTHING,_,_) -> | |
1214 | mcodekind := Ast0.MINUS(ref([],Ast0.default_token_info)) | |
1215 | | _ -> failwith "make_minus: unexpected befaft") | |
1216 | | Ast0.MINUS(_mc) -> () (* in the part copied from the src term *) | |
1217 | | Ast0.PLUS -> failwith "make_minus donothing: unexpected plus mcodekind" | |
1218 | | _ -> failwith "make_minus donothing: unexpected mcodekind" in | |
1219 | ||
1220 | let donothing r k e = | |
1221 | let mcodekind = Ast0.get_mcodekind_ref e in | |
1222 | let e = k e in update_mc mcodekind e; e in | |
1223 | ||
1224 | (* special case for whencode, because it isn't processed by contextneg, | |
1225 | since it doesn't appear in the + code *) | |
1226 | (* cases for dots and nests *) | |
1227 | let expression r k e = | |
1228 | let mcodekind = Ast0.get_mcodekind_ref e in | |
1229 | match Ast0.unwrap e with | |
1230 | Ast0.Edots(d,whencode) -> | |
1231 | (*don't recurse because whencode hasn't been processed by context_neg*) | |
1232 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Edots(mcode d,whencode)) | |
1233 | | Ast0.Ecircles(d,whencode) -> | |
1234 | (*don't recurse because whencode hasn't been processed by context_neg*) | |
1235 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Ecircles(mcode d,whencode)) | |
1236 | | Ast0.Estars(d,whencode) -> | |
1237 | (*don't recurse because whencode hasn't been processed by context_neg*) | |
1238 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Estars(mcode d,whencode)) | |
1239 | | Ast0.NestExpr(starter,expr_dots,ender,whencode,multi) -> | |
1240 | update_mc mcodekind e; | |
1241 | Ast0.rewrap e | |
1242 | (Ast0.NestExpr(mcode starter, | |
1243 | r.V0.rebuilder_expression_dots expr_dots, | |
1244 | mcode ender,whencode,multi)) | |
1245 | | _ -> donothing r k e in | |
1246 | ||
1247 | let declaration r k e = | |
1248 | let mcodekind = Ast0.get_mcodekind_ref e in | |
1249 | match Ast0.unwrap e with | |
1250 | Ast0.Ddots(d,whencode) -> | |
1251 | (*don't recurse because whencode hasn't been processed by context_neg*) | |
1252 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Ddots(mcode d,whencode)) | |
1253 | | _ -> donothing r k e in | |
1254 | ||
1255 | let statement r k e = | |
1256 | let mcodekind = Ast0.get_mcodekind_ref e in | |
1257 | match Ast0.unwrap e with | |
1258 | Ast0.Dots(d,whencode) -> | |
1259 | (*don't recurse because whencode hasn't been processed by context_neg*) | |
1260 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Dots(mcode d,whencode)) | |
1261 | | Ast0.Circles(d,whencode) -> | |
1262 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Circles(mcode d,whencode)) | |
1263 | | Ast0.Stars(d,whencode) -> | |
1264 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Stars(mcode d,whencode)) | |
1265 | | Ast0.Nest(starter,stmt_dots,ender,whencode,multi) -> | |
1266 | update_mc mcodekind e; | |
1267 | Ast0.rewrap e | |
1268 | (Ast0.Nest(mcode starter,r.V0.rebuilder_statement_dots stmt_dots, | |
1269 | mcode ender,whencode,multi)) | |
1270 | | _ -> donothing r k e in | |
1271 | ||
1272 | let initialiser r k e = | |
1273 | let mcodekind = Ast0.get_mcodekind_ref e in | |
1274 | match Ast0.unwrap e with | |
1275 | Ast0.Idots(d,whencode) -> | |
1276 | (*don't recurse because whencode hasn't been processed by context_neg*) | |
1277 | update_mc mcodekind e; Ast0.rewrap e (Ast0.Idots(mcode d,whencode)) | |
1278 | | _ -> donothing r k e in | |
1279 | ||
1280 | let dots r k e = | |
1281 | let info = Ast0.get_info e in | |
1282 | let mcodekind = Ast0.get_mcodekind_ref e in | |
1283 | match Ast0.unwrap e with | |
1284 | Ast0.DOTS([]) -> | |
1285 | (* if context is - this should be - as well. There are no tokens | |
1286 | here though, so the bottom-up minusifier in context_neg leaves it | |
1287 | as mixed (or context for sgrep2). It would be better to fix | |
1288 | context_neg, but that would | |
1289 | require a special case for each term with a dots subterm. *) | |
1290 | (match !mcodekind with | |
1291 | Ast0.MIXED(mc) | Ast0.CONTEXT(mc) -> | |
1292 | (match !mc with | |
1293 | (Ast.NOTHING,_,_) -> | |
1294 | mcodekind := Ast0.MINUS(ref([],Ast0.default_token_info)); | |
1295 | e | |
1296 | | _ -> failwith "make_minus: unexpected befaft") | |
1297 | (* code already processed by an enclosing iso *) | |
1298 | | Ast0.MINUS(mc) -> e | |
1299 | | _ -> | |
1300 | failwith | |
1301 | (Printf.sprintf | |
1302 | "%d: make_minus donothingxxx: unexpected mcodekind: %s" | |
1303 | info.Ast0.line_start (Dumper.dump e))) | |
1304 | | _ -> donothing r k e in | |
1305 | ||
1306 | V0.rebuilder | |
1307 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
1308 | dots dots dots dots dots dots | |
1309 | donothing expression donothing initialiser donothing declaration | |
1310 | statement donothing donothing | |
1311 | ||
1312 | (* --------------------------------------------------------------------- *) | |
1313 | (* rebuild mcode cells in an instantiated alt *) | |
1314 | ||
1315 | (* mcodes will be side effected later with plus code, so we have to copy | |
1316 | them on instantiating an isomorphism. One could wonder whether it would | |
1317 | be better not to use side-effects, but they are convenient for insert_plus | |
1318 | where is it useful to manipulate a list of the mcodes but side-effect a | |
1319 | tree *) | |
1320 | (* hmm... Insert_plus is called before Iso_pattern... *) | |
1321 | let rebuild_mcode start_line = | |
1322 | let copy_mcodekind = function | |
1323 | Ast0.CONTEXT(mc) -> Ast0.CONTEXT(ref (!mc)) | |
1324 | | Ast0.MINUS(mc) -> Ast0.MINUS(ref (!mc)) | |
1325 | | Ast0.MIXED(mc) -> Ast0.MIXED(ref (!mc)) | |
1326 | | Ast0.PLUS -> | |
1327 | (* this function is used elsewhere where we need to rebuild the | |
1328 | indices, and so we allow PLUS code as well *) | |
1329 | Ast0.PLUS in | |
1330 | ||
1331 | let mcode (term,arity,info,mcodekind,pos) = | |
1332 | let info = | |
1333 | match start_line with | |
1334 | Some x -> {info with Ast0.line_start = x; Ast0.line_end = x} | |
1335 | | None -> info in | |
1336 | (term,arity,info,copy_mcodekind mcodekind,pos) in | |
1337 | ||
1338 | let copy_one x = | |
1339 | let old_info = Ast0.get_info x in | |
1340 | let info = | |
1341 | match start_line with | |
1342 | Some x -> {old_info with Ast0.line_start = x; Ast0.line_end = x} | |
1343 | | None -> old_info in | |
1344 | {x with Ast0.info = info; Ast0.index = ref(Ast0.get_index x); | |
1345 | Ast0.mcodekind = ref (copy_mcodekind (Ast0.get_mcodekind x))} in | |
1346 | ||
1347 | let donothing r k e = copy_one (k e) in | |
1348 | ||
1349 | (* case for control operators (if, etc) *) | |
1350 | let statement r k e = | |
1351 | let s = k e in | |
1352 | let res = | |
1353 | copy_one | |
1354 | (Ast0.rewrap s | |
1355 | (match Ast0.unwrap s with | |
1356 | Ast0.Decl((info,mc),decl) -> | |
1357 | Ast0.Decl((info,copy_mcodekind mc),decl) | |
1358 | | Ast0.IfThen(iff,lp,tst,rp,branch,(info,mc)) -> | |
1359 | Ast0.IfThen(iff,lp,tst,rp,branch,(info,copy_mcodekind mc)) | |
1360 | | Ast0.IfThenElse(iff,lp,tst,rp,branch1,els,branch2,(info,mc)) -> | |
1361 | Ast0.IfThenElse(iff,lp,tst,rp,branch1,els,branch2, | |
1362 | (info,copy_mcodekind mc)) | |
1363 | | Ast0.While(whl,lp,exp,rp,body,(info,mc)) -> | |
1364 | Ast0.While(whl,lp,exp,rp,body,(info,copy_mcodekind mc)) | |
1365 | | Ast0.For(fr,lp,e1,sem1,e2,sem2,e3,rp,body,(info,mc)) -> | |
1366 | Ast0.For(fr,lp,e1,sem1,e2,sem2,e3,rp,body, | |
1367 | (info,copy_mcodekind mc)) | |
1368 | | Ast0.Iterator(nm,lp,args,rp,body,(info,mc)) -> | |
1369 | Ast0.Iterator(nm,lp,args,rp,body,(info,copy_mcodekind mc)) | |
1370 | | Ast0.FunDecl | |
1371 | ((info,mc),fninfo,name,lp,params,rp,lbrace,body,rbrace) -> | |
1372 | Ast0.FunDecl | |
1373 | ((info,copy_mcodekind mc), | |
1374 | fninfo,name,lp,params,rp,lbrace,body,rbrace) | |
1375 | | s -> s)) in | |
1376 | Ast0.set_dots_bef_aft res | |
1377 | (match Ast0.get_dots_bef_aft res with | |
1378 | Ast0.NoDots -> Ast0.NoDots | |
1379 | | Ast0.AddingBetweenDots s -> | |
1380 | Ast0.AddingBetweenDots(r.V0.rebuilder_statement s) | |
1381 | | Ast0.DroppingBetweenDots s -> | |
1382 | Ast0.DroppingBetweenDots(r.V0.rebuilder_statement s)) in | |
1383 | ||
1384 | V0.rebuilder | |
1385 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
1386 | donothing donothing donothing donothing donothing donothing | |
1387 | donothing donothing donothing donothing donothing | |
1388 | donothing statement donothing donothing | |
1389 | ||
1390 | (* --------------------------------------------------------------------- *) | |
1391 | (* The problem of whencode. If an isomorphism contains dots in multiple | |
1392 | rules, then the code that is matched cannot contain whencode, because we | |
1393 | won't know which dots it goes with. Should worry about nests, but they | |
1394 | aren't allowed in isomorphisms for the moment. *) | |
1395 | ||
1396 | let count_edots = | |
1397 | let mcode x = 0 in | |
1398 | let option_default = 0 in | |
1399 | let bind x y = x + y in | |
1400 | let donothing r k e = k e in | |
1401 | let exprfn r k e = | |
1402 | match Ast0.unwrap e with | |
1403 | Ast0.Edots(_,_) | Ast0.Ecircles(_,_) | Ast0.Estars(_,_) -> 1 | |
1404 | | _ -> 0 in | |
1405 | ||
1406 | V0.combiner bind option_default | |
1407 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
1408 | donothing donothing donothing donothing donothing donothing | |
1409 | donothing exprfn donothing donothing donothing donothing donothing | |
1410 | donothing donothing | |
1411 | ||
1412 | let count_idots = | |
1413 | let mcode x = 0 in | |
1414 | let option_default = 0 in | |
1415 | let bind x y = x + y in | |
1416 | let donothing r k e = k e in | |
1417 | let initfn r k e = | |
1418 | match Ast0.unwrap e with Ast0.Idots(_,_) -> 1 | _ -> 0 in | |
1419 | ||
1420 | V0.combiner bind option_default | |
1421 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
1422 | donothing donothing donothing donothing donothing donothing | |
1423 | donothing donothing donothing initfn donothing donothing donothing | |
1424 | donothing donothing | |
1425 | ||
1426 | let count_dots = | |
1427 | let mcode x = 0 in | |
1428 | let option_default = 0 in | |
1429 | let bind x y = x + y in | |
1430 | let donothing r k e = k e in | |
1431 | let stmtfn r k e = | |
1432 | match Ast0.unwrap e with | |
1433 | Ast0.Dots(_,_) | Ast0.Circles(_,_) | Ast0.Stars(_,_) -> 1 | |
1434 | | _ -> 0 in | |
1435 | ||
1436 | V0.combiner bind option_default | |
1437 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
1438 | donothing donothing donothing donothing donothing donothing | |
1439 | donothing donothing donothing donothing donothing donothing stmtfn | |
1440 | donothing donothing | |
1441 | ||
1442 | (* --------------------------------------------------------------------- *) | |
1443 | ||
1444 | let lookup name bindings mv_bindings = | |
1445 | try Common.Left (List.assoc (term name) bindings) | |
1446 | with | |
1447 | Not_found -> | |
1448 | (* failure is not possible anymore *) | |
1449 | Common.Right (List.assoc (term name) mv_bindings) | |
1450 | ||
1451 | (* mv_bindings is for the fresh metavariables that are introduced by the | |
1452 | isomorphism *) | |
1453 | let instantiate bindings mv_bindings = | |
1454 | let mcode x = | |
1455 | match Ast0.get_pos x with | |
1456 | Ast0.MetaPos(name,_,_) -> | |
1457 | (try | |
1458 | match lookup name bindings mv_bindings with | |
1459 | Common.Left(Ast0.MetaPosTag(id)) -> Ast0.set_pos id x | |
1460 | | _ -> failwith "not possible" | |
1461 | with Not_found -> Ast0.set_pos Ast0.NoMetaPos x) | |
1462 | | _ -> x in | |
1463 | let donothing r k e = k e in | |
1464 | ||
1465 | (* cases where metavariables can occur *) | |
1466 | let identfn r k e = | |
1467 | let e = k e in | |
1468 | match Ast0.unwrap e with | |
1469 | Ast0.MetaId(name,constraints,pure) -> | |
1470 | (rebuild_mcode None).V0.rebuilder_ident | |
1471 | (match lookup name bindings mv_bindings with | |
1472 | Common.Left(Ast0.IdentTag(id)) -> id | |
1473 | | Common.Left(_) -> failwith "not possible 1" | |
1474 | | Common.Right(new_mv) -> | |
1475 | Ast0.rewrap e | |
1476 | (Ast0.MetaId | |
1477 | (Ast0.set_mcode_data new_mv name,constraints,pure))) | |
1478 | | Ast0.MetaFunc(name,_,pure) -> failwith "metafunc not supported" | |
1479 | | Ast0.MetaLocalFunc(name,_,pure) -> failwith "metalocalfunc not supported" | |
1480 | | _ -> e in | |
1481 | ||
1482 | (* case for list metavariables *) | |
1483 | let rec elist r same_dots = function | |
1484 | [] -> [] | |
1485 | | [x] -> | |
1486 | (match Ast0.unwrap x with | |
1487 | Ast0.MetaExprList(name,lenname,pure) -> | |
1488 | failwith "meta_expr_list in iso not supported" | |
1489 | (*match lookup name bindings mv_bindings with | |
1490 | Common.Left(Ast0.DotsExprTag(exp)) -> | |
1491 | (match same_dots exp with | |
1492 | Some l -> l | |
1493 | | None -> failwith "dots put in incompatible context") | |
1494 | | Common.Left(Ast0.ExprTag(exp)) -> [exp] | |
1495 | | Common.Left(_) -> failwith "not possible 1" | |
1496 | | Common.Right(new_mv) -> | |
1497 | failwith "MetaExprList in SP not supported"*) | |
1498 | | _ -> [r.V0.rebuilder_expression x]) | |
1499 | | x::xs -> (r.V0.rebuilder_expression x)::(elist r same_dots xs) in | |
1500 | ||
1501 | let rec plist r same_dots = function | |
1502 | [] -> [] | |
1503 | | [x] -> | |
1504 | (match Ast0.unwrap x with | |
1505 | Ast0.MetaParamList(name,lenname,pure) -> | |
1506 | failwith "meta_param_list in iso not supported" | |
1507 | (*match lookup name bindings mv_bindings with | |
1508 | Common.Left(Ast0.DotsParamTag(param)) -> | |
1509 | (match same_dots param with | |
1510 | Some l -> l | |
1511 | | None -> failwith "dots put in incompatible context") | |
1512 | | Common.Left(Ast0.ParamTag(param)) -> [param] | |
1513 | | Common.Left(_) -> failwith "not possible 1" | |
1514 | | Common.Right(new_mv) -> | |
1515 | failwith "MetaExprList in SP not supported"*) | |
1516 | | _ -> [r.V0.rebuilder_parameter x]) | |
1517 | | x::xs -> (r.V0.rebuilder_parameter x)::(plist r same_dots xs) in | |
1518 | ||
1519 | let rec slist r same_dots = function | |
1520 | [] -> [] | |
1521 | | [x] -> | |
1522 | (match Ast0.unwrap x with | |
1523 | Ast0.MetaStmtList(name,pure) -> | |
1524 | (match lookup name bindings mv_bindings with | |
1525 | Common.Left(Ast0.DotsStmtTag(stm)) -> | |
1526 | (match same_dots stm with | |
1527 | Some l -> l | |
1528 | | None -> failwith "dots put in incompatible context") | |
1529 | | Common.Left(Ast0.StmtTag(stm)) -> [stm] | |
1530 | | Common.Left(_) -> failwith "not possible 1" | |
1531 | | Common.Right(new_mv) -> | |
1532 | failwith "MetaExprList in SP not supported") | |
1533 | | _ -> [r.V0.rebuilder_statement x]) | |
1534 | | x::xs -> (r.V0.rebuilder_statement x)::(slist r same_dots xs) in | |
1535 | ||
1536 | let same_dots d = | |
1537 | match Ast0.unwrap d with Ast0.DOTS(l) -> Some l |_ -> None in | |
1538 | let same_circles d = | |
1539 | match Ast0.unwrap d with Ast0.CIRCLES(l) -> Some l |_ -> None in | |
1540 | let same_stars d = | |
1541 | match Ast0.unwrap d with Ast0.STARS(l) -> Some l |_ -> None in | |
1542 | ||
1543 | let dots list_fn r k d = | |
1544 | Ast0.rewrap d | |
1545 | (match Ast0.unwrap d with | |
1546 | Ast0.DOTS(l) -> Ast0.DOTS(list_fn r same_dots l) | |
1547 | | Ast0.CIRCLES(l) -> Ast0.CIRCLES(list_fn r same_circles l) | |
1548 | | Ast0.STARS(l) -> Ast0.STARS(list_fn r same_stars l)) in | |
1549 | ||
1550 | let exprfn r k old_e = (* need to keep the original code for ! optim *) | |
1551 | let e = k old_e in | |
1552 | let e1 = | |
1553 | match Ast0.unwrap e with | |
1554 | Ast0.MetaExpr(name,constraints,x,form,pure) -> | |
1555 | (rebuild_mcode None).V0.rebuilder_expression | |
1556 | (match lookup name bindings mv_bindings with | |
1557 | Common.Left(Ast0.ExprTag(exp)) -> exp | |
1558 | | Common.Left(_) -> failwith "not possible 1" | |
1559 | | Common.Right(new_mv) -> | |
1560 | let new_types = | |
1561 | match x with | |
1562 | None -> None | |
1563 | | Some types -> | |
1564 | let rec renamer = function | |
1565 | Type_cocci.MetaType(name,keep,inherited) -> | |
1566 | (match | |
1567 | lookup (name,(),(),(),None) bindings mv_bindings | |
1568 | with | |
1569 | Common.Left(Ast0.TypeCTag(t)) -> | |
1570 | Ast0.ast0_type_to_type t | |
1571 | | Common.Left(_) -> | |
1572 | failwith "iso pattern: unexpected type" | |
1573 | | Common.Right(new_mv) -> | |
1574 | Type_cocci.MetaType(new_mv,keep,inherited)) | |
1575 | | Type_cocci.ConstVol(cv,ty) -> | |
1576 | Type_cocci.ConstVol(cv,renamer ty) | |
1577 | | Type_cocci.Pointer(ty) -> | |
1578 | Type_cocci.Pointer(renamer ty) | |
1579 | | Type_cocci.FunctionPointer(ty) -> | |
1580 | Type_cocci.FunctionPointer(renamer ty) | |
1581 | | Type_cocci.Array(ty) -> | |
1582 | Type_cocci.Array(renamer ty) | |
1583 | | t -> t in | |
1584 | Some(List.map renamer types) in | |
1585 | Ast0.rewrap e | |
1586 | (Ast0.MetaExpr | |
1587 | (Ast0.set_mcode_data new_mv name,constraints, | |
1588 | new_types,form,pure))) | |
1589 | | Ast0.MetaErr(namea,_,pure) -> failwith "metaerr not supported" | |
1590 | | Ast0.MetaExprList(namea,lenname,pure) -> | |
1591 | failwith "metaexprlist not supported" | |
1592 | | Ast0.Unary(exp,unop) -> | |
1593 | (match Ast0.unwrap_mcode unop with | |
1594 | Ast.Not -> | |
1595 | let was_meta = | |
1596 | (* k e doesn't change the outer structure of the term, | |
1597 | only the metavars *) | |
1598 | match Ast0.unwrap old_e with | |
1599 | Ast0.Unary(exp,_) -> | |
1600 | (match Ast0.unwrap exp with | |
1601 | Ast0.MetaExpr(name,constraints,x,form,pure) -> true | |
1602 | | _ -> false) | |
1603 | | _ -> failwith "not possible" in | |
1604 | let nomodif e = | |
1605 | let mc = Ast0.get_mcodekind exp in | |
1606 | match mc with | |
1607 | Ast0.MINUS(x) -> | |
1608 | (match !x with | |
1609 | ([],_) -> true | |
1610 | | _ -> false) | |
1611 | | Ast0.CONTEXT(x) | Ast0.MIXED(x) -> | |
1612 | (match !x with | |
1613 | (Ast.NOTHING,_,_) -> true | |
1614 | | _ -> false) | |
1615 | | _ -> failwith "plus not possible" in | |
1616 | if was_meta && nomodif exp && nomodif e | |
1617 | then | |
1618 | let idcont x = x in | |
1619 | let rec negate e (*for rewrapping*) res (*code to process*) k = | |
1620 | (* k accumulates parens, to keep negation outside if no | |
1621 | propagation is possible *) | |
1622 | match Ast0.unwrap res with | |
1623 | Ast0.Unary(e1,op) when Ast0.unwrap_mcode op = Ast.Not -> | |
1624 | k (Ast0.rewrap e (Ast0.unwrap e1)) | |
1625 | | Ast0.Edots(_,_) -> k (Ast0.rewrap e (Ast0.unwrap res)) | |
1626 | | Ast0.Paren(lp,e,rp) -> | |
1627 | negate e e | |
1628 | (function x -> | |
1629 | k (Ast0.rewrap res (Ast0.Paren(lp,x,rp)))) | |
1630 | | Ast0.Binary(e1,op,e2) -> | |
1631 | let reb nop = Ast0.rewrap_mcode op (Ast.Logical(nop)) in | |
1632 | let k1 x = k (Ast0.rewrap e x) in | |
1633 | (match Ast0.unwrap_mcode op with | |
1634 | Ast.Logical(Ast.Inf) -> | |
1635 | k1 (Ast0.Binary(e1,reb Ast.SupEq,e2)) | |
1636 | | Ast.Logical(Ast.Sup) -> | |
1637 | k1 (Ast0.Binary(e1,reb Ast.InfEq,e2)) | |
1638 | | Ast.Logical(Ast.InfEq) -> | |
1639 | k1 (Ast0.Binary(e1,reb Ast.Sup,e2)) | |
1640 | | Ast.Logical(Ast.SupEq) -> | |
1641 | k1 (Ast0.Binary(e1,reb Ast.Inf,e2)) | |
1642 | | Ast.Logical(Ast.Eq) -> | |
1643 | k1 (Ast0.Binary(e1,reb Ast.NotEq,e2)) | |
1644 | | Ast.Logical(Ast.NotEq) -> | |
1645 | k1 (Ast0.Binary(e1,reb Ast.Eq,e2)) | |
1646 | | Ast.Logical(Ast.AndLog) -> | |
1647 | k1 (Ast0.Binary(negate e1 e1 idcont,reb Ast.OrLog, | |
1648 | negate e2 e2 idcont)) | |
1649 | | Ast.Logical(Ast.OrLog) -> | |
1650 | k1 (Ast0.Binary(negate e1 e1 idcont,reb Ast.AndLog, | |
1651 | negate e2 e2 idcont)) | |
1652 | | _ -> | |
1653 | Ast0.rewrap e | |
1654 | (Ast0.Unary(k res,Ast0.rewrap_mcode op Ast.Not))) | |
1655 | | Ast0.DisjExpr(lp,exps,mids,rp) -> | |
1656 | (* use res because it is the transformed argument *) | |
1657 | let exps = List.map (function e -> negate e e k) exps in | |
1658 | Ast0.rewrap res (Ast0.DisjExpr(lp,exps,mids,rp)) | |
1659 | | _ -> | |
1660 | (*use e, because this might be the toplevel expression*) | |
1661 | Ast0.rewrap e | |
1662 | (Ast0.Unary(k res,Ast0.rewrap_mcode unop Ast.Not)) in | |
1663 | negate e exp idcont | |
1664 | else e | |
1665 | | _ -> e) | |
1666 | | Ast0.Edots(d,_) -> | |
1667 | (try | |
1668 | (match List.assoc (dot_term d) bindings with | |
1669 | Ast0.ExprTag(exp) -> Ast0.rewrap e (Ast0.Edots(d,Some exp)) | |
1670 | | _ -> failwith "unexpected binding") | |
1671 | with Not_found -> e) | |
1672 | | Ast0.Ecircles(d,_) -> | |
1673 | (try | |
1674 | (match List.assoc (dot_term d) bindings with | |
1675 | Ast0.ExprTag(exp) -> Ast0.rewrap e (Ast0.Ecircles(d,Some exp)) | |
1676 | | _ -> failwith "unexpected binding") | |
1677 | with Not_found -> e) | |
1678 | | Ast0.Estars(d,_) -> | |
1679 | (try | |
1680 | (match List.assoc (dot_term d) bindings with | |
1681 | Ast0.ExprTag(exp) -> Ast0.rewrap e (Ast0.Estars(d,Some exp)) | |
1682 | | _ -> failwith "unexpected binding") | |
1683 | with Not_found -> e) | |
1684 | | _ -> e in | |
1685 | if Ast0.get_test_exp old_e then Ast0.set_test_exp e1 else e1 in | |
1686 | ||
1687 | let tyfn r k e = | |
1688 | let e = k e in | |
1689 | match Ast0.unwrap e with | |
1690 | Ast0.MetaType(name,pure) -> | |
1691 | (rebuild_mcode None).V0.rebuilder_typeC | |
1692 | (match lookup name bindings mv_bindings with | |
1693 | Common.Left(Ast0.TypeCTag(ty)) -> ty | |
1694 | | Common.Left(_) -> failwith "not possible 1" | |
1695 | | Common.Right(new_mv) -> | |
1696 | Ast0.rewrap e | |
1697 | (Ast0.MetaType(Ast0.set_mcode_data new_mv name,pure))) | |
1698 | | _ -> e in | |
1699 | ||
1700 | let initfn r k e = | |
1701 | let e = k e in | |
1702 | match Ast0.unwrap e with | |
1703 | Ast0.MetaInit(name,pure) -> | |
1704 | (rebuild_mcode None).V0.rebuilder_initialiser | |
1705 | (match lookup name bindings mv_bindings with | |
1706 | Common.Left(Ast0.InitTag(ty)) -> ty | |
1707 | | Common.Left(_) -> failwith "not possible 1" | |
1708 | | Common.Right(new_mv) -> | |
1709 | Ast0.rewrap e | |
1710 | (Ast0.MetaInit(Ast0.set_mcode_data new_mv name,pure))) | |
1711 | | _ -> e in | |
1712 | ||
1713 | let declfn r k e = | |
1714 | let e = k e in | |
1715 | match Ast0.unwrap e with | |
1716 | Ast0.Ddots(d,_) -> | |
1717 | (try | |
1718 | (match List.assoc (dot_term d) bindings with | |
1719 | Ast0.DeclTag(exp) -> Ast0.rewrap e (Ast0.Ddots(d,Some exp)) | |
1720 | | _ -> failwith "unexpected binding") | |
1721 | with Not_found -> e) | |
1722 | | _ -> e in | |
1723 | ||
1724 | let paramfn r k e = | |
1725 | let e = k e in | |
1726 | match Ast0.unwrap e with | |
1727 | Ast0.MetaParam(name,pure) -> | |
1728 | (rebuild_mcode None).V0.rebuilder_parameter | |
1729 | (match lookup name bindings mv_bindings with | |
1730 | Common.Left(Ast0.ParamTag(param)) -> param | |
1731 | | Common.Left(_) -> failwith "not possible 1" | |
1732 | | Common.Right(new_mv) -> | |
1733 | Ast0.rewrap e | |
1734 | (Ast0.MetaParam(Ast0.set_mcode_data new_mv name, pure))) | |
1735 | | Ast0.MetaParamList(name,lenname,pure) -> | |
1736 | failwith "metaparamlist not supported" | |
1737 | | _ -> e in | |
1738 | ||
1739 | let whenfn (_,v) = | |
1740 | match v with | |
1741 | Ast0.DotsStmtTag(stms) -> Ast0.WhenNot stms | |
1742 | | Ast0.StmtTag(stm) -> Ast0.WhenAlways stm | |
1743 | | Ast0.IsoWhenTTag(stm) -> Ast0.WhenNotTrue stm | |
1744 | | Ast0.IsoWhenFTag(stm) -> Ast0.WhenNotFalse stm | |
1745 | | Ast0.IsoWhenTag(x) -> Ast0.WhenModifier(x) | |
1746 | | _ -> failwith "unexpected binding" in | |
1747 | ||
1748 | let stmtfn r k e = | |
1749 | let e = k e in | |
1750 | match Ast0.unwrap e with | |
1751 | Ast0.MetaStmt(name,pure) -> | |
1752 | (rebuild_mcode None).V0.rebuilder_statement | |
1753 | (match lookup name bindings mv_bindings with | |
1754 | Common.Left(Ast0.StmtTag(stm)) -> stm | |
1755 | | Common.Left(_) -> failwith "not possible 1" | |
1756 | | Common.Right(new_mv) -> | |
1757 | Ast0.rewrap e | |
1758 | (Ast0.MetaStmt(Ast0.set_mcode_data new_mv name,pure))) | |
1759 | | Ast0.MetaStmtList(name,pure) -> failwith "metastmtlist not supported" | |
1760 | | Ast0.Dots(d,_) -> | |
1761 | Ast0.rewrap e | |
1762 | (Ast0.Dots | |
1763 | (d, | |
1764 | List.map whenfn | |
1765 | (List.filter (function (x,v) -> x = (dot_term d)) bindings))) | |
1766 | | Ast0.Circles(d,_) -> | |
1767 | Ast0.rewrap e | |
1768 | (Ast0.Circles | |
1769 | (d, | |
1770 | List.map whenfn | |
1771 | (List.filter (function (x,v) -> x = (dot_term d)) bindings))) | |
1772 | | Ast0.Stars(d,_) -> | |
1773 | Ast0.rewrap e | |
1774 | (Ast0.Stars | |
1775 | (d, | |
1776 | List.map whenfn | |
1777 | (List.filter (function (x,v) -> x = (dot_term d)) bindings))) | |
1778 | | _ -> e in | |
1779 | ||
1780 | V0.rebuilder | |
1781 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
1782 | (dots elist) donothing (dots plist) (dots slist) donothing donothing | |
1783 | identfn exprfn tyfn initfn paramfn declfn stmtfn donothing donothing | |
1784 | ||
1785 | (* --------------------------------------------------------------------- *) | |
1786 | ||
1787 | let is_minus e = | |
1788 | match Ast0.get_mcodekind e with Ast0.MINUS(cell) -> true | _ -> false | |
1789 | ||
1790 | let context_required e = not(is_minus e) && not !Flag.sgrep_mode2 | |
1791 | ||
1792 | let disj_fail bindings e = | |
1793 | match bindings with | |
1794 | Some x -> Printf.fprintf stderr "no disj available at this type"; e | |
1795 | | None -> e | |
1796 | ||
1797 | (* isomorphism code is by default CONTEXT *) | |
1798 | let merge_plus model_mcode e_mcode = | |
1799 | match model_mcode with | |
1800 | Ast0.MINUS(mc) -> | |
1801 | (* add the replacement information at the root *) | |
1802 | (match e_mcode with | |
1803 | Ast0.MINUS(emc) -> | |
1804 | emc := | |
1805 | (match (!mc,!emc) with | |
1806 | (([],_),(x,t)) | ((x,_),([],t)) -> (x,t) | |
1807 | | _ -> failwith "how can we combine minuses?") | |
1808 | | _ -> failwith "not possible 6") | |
1809 | | Ast0.CONTEXT(mc) -> | |
1810 | (match e_mcode with | |
1811 | Ast0.CONTEXT(emc) -> | |
1812 | (* keep the logical line info as in the model *) | |
1813 | let (mba,tb,ta) = !mc in | |
1814 | let (eba,_,_) = !emc in | |
1815 | (* merging may be required when a term is replaced by a subterm *) | |
1816 | let merged = | |
1817 | match (mba,eba) with | |
1818 | (x,Ast.NOTHING) | (Ast.NOTHING,x) -> x | |
1819 | | (Ast.BEFORE(b1),Ast.BEFORE(b2)) -> Ast.BEFORE(b1@b2) | |
1820 | | (Ast.BEFORE(b),Ast.AFTER(a)) -> Ast.BEFOREAFTER(b,a) | |
1821 | | (Ast.BEFORE(b1),Ast.BEFOREAFTER(b2,a)) -> | |
1822 | Ast.BEFOREAFTER(b1@b2,a) | |
1823 | | (Ast.AFTER(a),Ast.BEFORE(b)) -> Ast.BEFOREAFTER(b,a) | |
1824 | | (Ast.AFTER(a1),Ast.AFTER(a2)) ->Ast.AFTER(a2@a1) | |
1825 | | (Ast.AFTER(a1),Ast.BEFOREAFTER(b,a2)) -> Ast.BEFOREAFTER(b,a2@a1) | |
1826 | | (Ast.BEFOREAFTER(b1,a),Ast.BEFORE(b2)) -> | |
1827 | Ast.BEFOREAFTER(b1@b2,a) | |
1828 | | (Ast.BEFOREAFTER(b,a1),Ast.AFTER(a2)) -> | |
1829 | Ast.BEFOREAFTER(b,a2@a1) | |
1830 | | (Ast.BEFOREAFTER(b1,a1),Ast.BEFOREAFTER(b2,a2)) -> | |
1831 | Ast.BEFOREAFTER(b1@b2,a2@a1) in | |
1832 | emc := (merged,tb,ta) | |
1833 | | Ast0.MINUS(emc) -> | |
1834 | let (anything_bef_aft,_,_) = !mc in | |
1835 | let (anythings,t) = !emc in | |
1836 | emc := | |
1837 | (match anything_bef_aft with | |
1838 | Ast.BEFORE(b) -> (b@anythings,t) | |
1839 | | Ast.AFTER(a) -> (anythings@a,t) | |
1840 | | Ast.BEFOREAFTER(b,a) -> (b@anythings@a,t) | |
1841 | | Ast.NOTHING -> (anythings,t)) | |
1842 | | _ -> failwith "not possible 7") | |
1843 | | Ast0.MIXED(_) -> failwith "not possible 8" | |
1844 | | Ast0.PLUS -> failwith "not possible 9" | |
1845 | ||
1846 | let copy_plus printer minusify model e = | |
1847 | if !Flag.sgrep_mode2 | |
1848 | then e (* no plus code, can cause a "not possible" error, so just avoid it *) | |
1849 | else | |
1850 | let e = | |
1851 | match Ast0.get_mcodekind model with | |
1852 | Ast0.MINUS(mc) -> minusify e | |
1853 | | Ast0.CONTEXT(mc) -> e | |
1854 | | _ -> failwith "not possible: copy_plus\n" in | |
1855 | merge_plus (Ast0.get_mcodekind model) (Ast0.get_mcodekind e); | |
1856 | e | |
1857 | ||
1858 | let copy_minus printer minusify model e = | |
1859 | match Ast0.get_mcodekind model with | |
1860 | Ast0.MINUS(mc) -> minusify e | |
1861 | | Ast0.CONTEXT(mc) -> e | |
1862 | | Ast0.MIXED(_) -> | |
1863 | if !Flag.sgrep_mode2 | |
1864 | then e | |
1865 | else failwith "not possible 8" | |
1866 | | Ast0.PLUS -> failwith "not possible 9" | |
1867 | ||
1868 | let whencode_allowed prev_ecount prev_icount prev_dcount | |
1869 | ecount icount dcount rest = | |
1870 | (* actually, if ecount or dcount is 0, the flag doesn't matter, because it | |
1871 | won't be tested *) | |
1872 | let other_ecount = (* number of edots *) | |
1873 | List.fold_left (function rest -> function (_,ec,ic,dc) -> ec + rest) | |
1874 | prev_ecount rest in | |
1875 | let other_icount = (* number of dots *) | |
1876 | List.fold_left (function rest -> function (_,ec,ic,dc) -> ic + rest) | |
1877 | prev_icount rest in | |
1878 | let other_dcount = (* number of dots *) | |
1879 | List.fold_left (function rest -> function (_,ec,ic,dc) -> dc + rest) | |
1880 | prev_dcount rest in | |
1881 | (ecount = 0 or other_ecount = 0, icount = 0 or other_icount = 0, | |
1882 | dcount = 0 or other_dcount = 0) | |
1883 | ||
1884 | (* copy the befores and afters to the instantiated code *) | |
1885 | let extra_copy_stmt_plus model e = | |
1886 | (if not !Flag.sgrep_mode2 (* sgrep has no plus code, so nothing to do *) | |
1887 | then | |
1888 | (match Ast0.unwrap model with | |
1889 | Ast0.FunDecl((info,bef),_,_,_,_,_,_,_,_) | |
1890 | | Ast0.Decl((info,bef),_) -> | |
1891 | (match Ast0.unwrap e with | |
1892 | Ast0.FunDecl((info,bef1),_,_,_,_,_,_,_,_) | |
1893 | | Ast0.Decl((info,bef1),_) -> | |
1894 | merge_plus bef bef1 | |
1895 | | _ -> merge_plus bef (Ast0.get_mcodekind e)) | |
1896 | | Ast0.IfThen(_,_,_,_,_,(info,aft)) | |
1897 | | Ast0.IfThenElse(_,_,_,_,_,_,_,(info,aft)) | |
1898 | | Ast0.While(_,_,_,_,_,(info,aft)) | |
1899 | | Ast0.For(_,_,_,_,_,_,_,_,_,(info,aft)) | |
1900 | | Ast0.Iterator(_,_,_,_,_,(info,aft)) -> | |
1901 | (match Ast0.unwrap e with | |
1902 | Ast0.IfThen(_,_,_,_,_,(info,aft1)) | |
1903 | | Ast0.IfThenElse(_,_,_,_,_,_,_,(info,aft1)) | |
1904 | | Ast0.While(_,_,_,_,_,(info,aft1)) | |
1905 | | Ast0.For(_,_,_,_,_,_,_,_,_,(info,aft1)) | |
1906 | | Ast0.Iterator(_,_,_,_,_,(info,aft1)) -> | |
1907 | merge_plus aft aft1 | |
1908 | | _ -> merge_plus aft (Ast0.get_mcodekind e)) | |
1909 | | _ -> ())); | |
1910 | e | |
1911 | ||
1912 | let extra_copy_other_plus model e = e | |
1913 | ||
1914 | (* --------------------------------------------------------------------- *) | |
1915 | ||
1916 | let mv_count = ref 0 | |
1917 | let new_mv (_,s) = | |
1918 | let ct = !mv_count in | |
1919 | mv_count := !mv_count + 1; | |
1920 | "_"^s^"_"^(string_of_int ct) | |
1921 | ||
1922 | let get_name = function | |
1923 | Ast.MetaIdDecl(ar,nm) -> | |
1924 | (nm,function nm -> Ast.MetaIdDecl(ar,nm)) | |
1925 | | Ast.MetaFreshIdDecl(ar,nm) -> | |
1926 | (nm,function nm -> Ast.MetaFreshIdDecl(ar,nm)) | |
1927 | | Ast.MetaTypeDecl(ar,nm) -> | |
1928 | (nm,function nm -> Ast.MetaTypeDecl(ar,nm)) | |
1929 | | Ast.MetaInitDecl(ar,nm) -> | |
1930 | (nm,function nm -> Ast.MetaInitDecl(ar,nm)) | |
1931 | | Ast.MetaListlenDecl(nm) -> | |
1932 | failwith "should not be rebuilt" | |
1933 | | Ast.MetaParamDecl(ar,nm) -> | |
1934 | (nm,function nm -> Ast.MetaParamDecl(ar,nm)) | |
1935 | | Ast.MetaParamListDecl(ar,nm,nm1) -> | |
1936 | (nm,function nm -> Ast.MetaParamListDecl(ar,nm,nm1)) | |
1937 | | Ast.MetaConstDecl(ar,nm,ty) -> | |
1938 | (nm,function nm -> Ast.MetaConstDecl(ar,nm,ty)) | |
1939 | | Ast.MetaErrDecl(ar,nm) -> | |
1940 | (nm,function nm -> Ast.MetaErrDecl(ar,nm)) | |
1941 | | Ast.MetaExpDecl(ar,nm,ty) -> | |
1942 | (nm,function nm -> Ast.MetaExpDecl(ar,nm,ty)) | |
1943 | | Ast.MetaIdExpDecl(ar,nm,ty) -> | |
1944 | (nm,function nm -> Ast.MetaIdExpDecl(ar,nm,ty)) | |
1945 | | Ast.MetaLocalIdExpDecl(ar,nm,ty) -> | |
1946 | (nm,function nm -> Ast.MetaLocalIdExpDecl(ar,nm,ty)) | |
1947 | | Ast.MetaExpListDecl(ar,nm,nm1) -> | |
1948 | (nm,function nm -> Ast.MetaExpListDecl(ar,nm,nm1)) | |
1949 | | Ast.MetaStmDecl(ar,nm) -> | |
1950 | (nm,function nm -> Ast.MetaStmDecl(ar,nm)) | |
1951 | | Ast.MetaStmListDecl(ar,nm) -> | |
1952 | (nm,function nm -> Ast.MetaStmListDecl(ar,nm)) | |
1953 | | Ast.MetaFuncDecl(ar,nm) -> | |
1954 | (nm,function nm -> Ast.MetaFuncDecl(ar,nm)) | |
1955 | | Ast.MetaLocalFuncDecl(ar,nm) -> | |
1956 | (nm,function nm -> Ast.MetaLocalFuncDecl(ar,nm)) | |
1957 | | Ast.MetaPosDecl(ar,nm) -> | |
1958 | (nm,function nm -> Ast.MetaPosDecl(ar,nm)) | |
1959 | | Ast.MetaDeclarerDecl(ar,nm) -> | |
1960 | (nm,function nm -> Ast.MetaDeclarerDecl(ar,nm)) | |
1961 | | Ast.MetaIteratorDecl(ar,nm) -> | |
1962 | (nm,function nm -> Ast.MetaIteratorDecl(ar,nm)) | |
1963 | ||
1964 | let make_new_metavars metavars bindings = | |
1965 | let new_metavars = | |
1966 | List.filter | |
1967 | (function mv -> | |
1968 | let (s,_) = get_name mv in | |
1969 | try let _ = List.assoc s bindings in false with Not_found -> true) | |
1970 | metavars in | |
1971 | List.split | |
1972 | (List.map | |
1973 | (function mv -> | |
1974 | let (s,rebuild) = get_name mv in | |
1975 | let new_s = (!current_rule,new_mv s) in | |
1976 | (rebuild new_s, (s,new_s))) | |
1977 | new_metavars) | |
1978 | ||
1979 | (* --------------------------------------------------------------------- *) | |
1980 | ||
1981 | let do_nothing x = x | |
1982 | ||
1983 | let mkdisj matcher metavars alts e instantiater mkiso disj_maker minusify | |
1984 | rebuild_mcodes name printer extra_plus update_others = | |
1985 | let call_instantiate bindings mv_bindings alts = | |
1986 | List.concat | |
1987 | (List.map | |
1988 | (function (a,_,_,_) -> | |
1989 | nub | |
1990 | (* no need to create duplicates when the bindings have no effect *) | |
1991 | (List.map | |
1992 | (function bindings -> | |
1993 | Ast0.set_iso | |
1994 | (copy_plus printer minusify e | |
1995 | (extra_plus e | |
1996 | (instantiater bindings mv_bindings | |
1997 | (rebuild_mcodes a)))) | |
1998 | (Common.union_set [(name,mkiso a)] (Ast0.get_iso e))) | |
1999 | bindings)) | |
2000 | alts) in | |
2001 | let rec inner_loop all_alts prev_ecount prev_icount prev_dcount = function | |
2002 | [] -> Common.Left (prev_ecount, prev_icount, prev_dcount) | |
2003 | | ((pattern,ecount,icount,dcount)::rest) -> | |
2004 | let wc = | |
2005 | whencode_allowed prev_ecount prev_icount prev_dcount | |
2006 | ecount dcount icount rest in | |
2007 | (match matcher true (context_required e) wc pattern e init_env with | |
2008 | Fail(reason) -> | |
2009 | if reason = NonMatch || not !Flag_parsing_cocci.show_iso_failures | |
2010 | then () | |
2011 | else | |
2012 | (match matcher false false wc pattern e init_env with | |
2013 | OK _ -> | |
2014 | interpret_reason name (Ast0.get_line e) reason | |
2015 | (function () -> printer e) | |
2016 | | _ -> ()); | |
2017 | inner_loop all_alts (prev_ecount + ecount) (prev_icount + icount) | |
2018 | (prev_dcount + dcount) rest | |
2019 | | OK (bindings : (((string * string) * 'a) list list)) -> | |
2020 | let all_alts = | |
2021 | (* apply update_others to all patterns other than the matched | |
2022 | one. This is used to desigate the others as test | |
2023 | expressions in the TestExpression case *) | |
2024 | (List.map | |
2025 | (function (x,e,i,d) as all -> | |
2026 | if x = pattern | |
2027 | then all | |
2028 | else (update_others x,e,i,d)) | |
2029 | (List.hd all_alts)) :: | |
2030 | (List.map | |
2031 | (List.map (function (x,e,i,d) -> (update_others x,e,i,d))) | |
2032 | (List.tl all_alts)) in | |
2033 | (match List.concat all_alts with | |
2034 | [x] -> Common.Left (prev_ecount, prev_icount, prev_dcount) | |
2035 | | all_alts -> | |
2036 | let (new_metavars,mv_bindings) = | |
2037 | make_new_metavars metavars (nub(List.concat bindings)) in | |
2038 | Common.Right | |
2039 | (new_metavars, | |
2040 | call_instantiate bindings mv_bindings all_alts))) in | |
2041 | let rec outer_loop prev_ecount prev_icount prev_dcount = function | |
2042 | [] | [[_]] (*only one alternative*) -> ([],e) (* nothing matched *) | |
2043 | | (alts::rest) as all_alts -> | |
2044 | match inner_loop all_alts prev_ecount prev_icount prev_dcount alts with | |
2045 | Common.Left(prev_ecount, prev_icount, prev_dcount) -> | |
2046 | outer_loop prev_ecount prev_icount prev_dcount rest | |
2047 | | Common.Right (new_metavars,res) -> | |
2048 | (new_metavars, | |
2049 | copy_minus printer minusify e (disj_maker res)) in | |
2050 | outer_loop 0 0 0 alts | |
2051 | ||
2052 | (* no one should ever look at the information stored in these mcodes *) | |
2053 | let disj_starter lst = | |
2054 | let old_info = Ast0.get_info(List.hd lst) in | |
2055 | let info = | |
2056 | { old_info with | |
2057 | Ast0.line_end = old_info.Ast0.line_start; | |
2058 | Ast0.logical_end = old_info.Ast0.logical_start; | |
2059 | Ast0.attachable_start = false; Ast0.attachable_end = false; | |
2060 | Ast0.mcode_start = []; Ast0.mcode_end = []; | |
2061 | Ast0.strings_before = []; Ast0.strings_after = [] } in | |
2062 | Ast0.make_mcode_info "(" info | |
2063 | ||
2064 | let disj_ender lst = | |
2065 | let old_info = Ast0.get_info(List.hd lst) in | |
2066 | let info = | |
2067 | { old_info with | |
2068 | Ast0.line_start = old_info.Ast0.line_end; | |
2069 | Ast0.logical_start = old_info.Ast0.logical_end; | |
2070 | Ast0.attachable_start = false; Ast0.attachable_end = false; | |
2071 | Ast0.mcode_start = []; Ast0.mcode_end = []; | |
2072 | Ast0.strings_before = []; Ast0.strings_after = [] } in | |
2073 | Ast0.make_mcode_info ")" info | |
2074 | ||
2075 | let disj_mid _ = Ast0.make_mcode "|" | |
2076 | ||
2077 | let make_disj_type tl = | |
2078 | let mids = | |
2079 | match tl with | |
2080 | [] -> failwith "bad disjunction" | |
2081 | | x::xs -> List.map disj_mid xs in | |
2082 | Ast0.context_wrap (Ast0.DisjType(disj_starter tl,tl,mids,disj_ender tl)) | |
2083 | let make_disj_stmt_list tl = | |
2084 | let mids = | |
2085 | match tl with | |
2086 | [] -> failwith "bad disjunction" | |
2087 | | x::xs -> List.map disj_mid xs in | |
2088 | Ast0.context_wrap (Ast0.Disj(disj_starter tl,tl,mids,disj_ender tl)) | |
2089 | let make_disj_expr model el = | |
2090 | let mids = | |
2091 | match el with | |
2092 | [] -> failwith "bad disjunction" | |
2093 | | x::xs -> List.map disj_mid xs in | |
2094 | let update_arg x = | |
2095 | if Ast0.get_arg_exp model then Ast0.set_arg_exp x else x in | |
2096 | let update_test x = | |
2097 | let x = if Ast0.get_test_pos model then Ast0.set_test_pos x else x in | |
2098 | if Ast0.get_test_exp model then Ast0.set_test_exp x else x in | |
2099 | let el = List.map update_arg (List.map update_test el) in | |
2100 | Ast0.context_wrap (Ast0.DisjExpr(disj_starter el,el,mids,disj_ender el)) | |
2101 | let make_disj_decl dl = | |
2102 | let mids = | |
2103 | match dl with | |
2104 | [] -> failwith "bad disjunction" | |
2105 | | x::xs -> List.map disj_mid xs in | |
2106 | Ast0.context_wrap (Ast0.DisjDecl(disj_starter dl,dl,mids,disj_ender dl)) | |
2107 | let make_disj_stmt sl = | |
2108 | let dotify x = Ast0.context_wrap (Ast0.DOTS[x]) in | |
2109 | let mids = | |
2110 | match sl with | |
2111 | [] -> failwith "bad disjunction" | |
2112 | | x::xs -> List.map disj_mid xs in | |
2113 | Ast0.context_wrap | |
2114 | (Ast0.Disj(disj_starter sl,List.map dotify sl,mids,disj_ender sl)) | |
2115 | ||
2116 | let transform_type (metavars,alts,name) e = | |
2117 | match alts with | |
2118 | (Ast0.TypeCTag(_)::_)::_ -> | |
2119 | (* start line is given to any leaves in the iso code *) | |
2120 | let start_line = Some ((Ast0.get_info e).Ast0.line_start) in | |
2121 | let alts = | |
2122 | List.map | |
2123 | (List.map | |
2124 | (function | |
2125 | Ast0.TypeCTag(p) -> | |
2126 | (p,count_edots.V0.combiner_typeC p, | |
2127 | count_idots.V0.combiner_typeC p, | |
2128 | count_dots.V0.combiner_typeC p) | |
2129 | | _ -> failwith "invalid alt")) | |
2130 | alts in | |
2131 | mkdisj match_typeC metavars alts e | |
2132 | (function b -> function mv_b -> | |
2133 | (instantiate b mv_b).V0.rebuilder_typeC) | |
2134 | (function t -> Ast0.TypeCTag t) | |
2135 | make_disj_type make_minus.V0.rebuilder_typeC | |
2136 | (rebuild_mcode start_line).V0.rebuilder_typeC | |
2137 | name Unparse_ast0.typeC extra_copy_other_plus do_nothing | |
2138 | | _ -> ([],e) | |
2139 | ||
2140 | ||
2141 | let transform_expr (metavars,alts,name) e = | |
2142 | let process update_others = | |
2143 | (* start line is given to any leaves in the iso code *) | |
2144 | let start_line = Some ((Ast0.get_info e).Ast0.line_start) in | |
2145 | let alts = | |
2146 | List.map | |
2147 | (List.map | |
2148 | (function | |
2149 | Ast0.ExprTag(p) | Ast0.ArgExprTag(p) | Ast0.TestExprTag(p) -> | |
2150 | (p,count_edots.V0.combiner_expression p, | |
2151 | count_idots.V0.combiner_expression p, | |
2152 | count_dots.V0.combiner_expression p) | |
2153 | | _ -> failwith "invalid alt")) | |
2154 | alts in | |
2155 | mkdisj match_expr metavars alts e | |
2156 | (function b -> function mv_b -> | |
2157 | (instantiate b mv_b).V0.rebuilder_expression) | |
2158 | (function e -> Ast0.ExprTag e) | |
2159 | (make_disj_expr e) | |
2160 | make_minus.V0.rebuilder_expression | |
2161 | (rebuild_mcode start_line).V0.rebuilder_expression | |
2162 | name Unparse_ast0.expression extra_copy_other_plus update_others in | |
2163 | match alts with | |
2164 | (Ast0.ExprTag(_)::_)::_ -> process do_nothing | |
2165 | | (Ast0.ArgExprTag(_)::_)::_ when Ast0.get_arg_exp e -> process do_nothing | |
2166 | | (Ast0.TestExprTag(_)::_)::_ when Ast0.get_test_pos e -> | |
2167 | process Ast0.set_test_exp | |
2168 | | _ -> ([],e) | |
2169 | ||
2170 | let transform_decl (metavars,alts,name) e = | |
2171 | match alts with | |
2172 | (Ast0.DeclTag(_)::_)::_ -> | |
2173 | (* start line is given to any leaves in the iso code *) | |
2174 | let start_line = Some (Ast0.get_info e).Ast0.line_start in | |
2175 | let alts = | |
2176 | List.map | |
2177 | (List.map | |
2178 | (function | |
2179 | Ast0.DeclTag(p) -> | |
2180 | (p,count_edots.V0.combiner_declaration p, | |
2181 | count_idots.V0.combiner_declaration p, | |
2182 | count_dots.V0.combiner_declaration p) | |
2183 | | _ -> failwith "invalid alt")) | |
2184 | alts in | |
2185 | mkdisj match_decl metavars alts e | |
2186 | (function b -> function mv_b -> | |
2187 | (instantiate b mv_b).V0.rebuilder_declaration) | |
2188 | (function d -> Ast0.DeclTag d) | |
2189 | make_disj_decl | |
2190 | make_minus.V0.rebuilder_declaration | |
2191 | (rebuild_mcode start_line).V0.rebuilder_declaration | |
2192 | name Unparse_ast0.declaration extra_copy_other_plus do_nothing | |
2193 | | _ -> ([],e) | |
2194 | ||
2195 | let transform_stmt (metavars,alts,name) e = | |
2196 | match alts with | |
2197 | (Ast0.StmtTag(_)::_)::_ -> | |
2198 | (* start line is given to any leaves in the iso code *) | |
2199 | let start_line = Some (Ast0.get_info e).Ast0.line_start in | |
2200 | let alts = | |
2201 | List.map | |
2202 | (List.map | |
2203 | (function | |
2204 | Ast0.StmtTag(p) -> | |
2205 | (p,count_edots.V0.combiner_statement p, | |
2206 | count_idots.V0.combiner_statement p, | |
2207 | count_dots.V0.combiner_statement p) | |
2208 | | _ -> failwith "invalid alt")) | |
2209 | alts in | |
2210 | mkdisj match_statement metavars alts e | |
2211 | (function b -> function mv_b -> | |
2212 | (instantiate b mv_b).V0.rebuilder_statement) | |
2213 | (function s -> Ast0.StmtTag s) | |
2214 | make_disj_stmt make_minus.V0.rebuilder_statement | |
2215 | (rebuild_mcode start_line).V0.rebuilder_statement | |
2216 | name (Unparse_ast0.statement "") extra_copy_stmt_plus do_nothing | |
2217 | | _ -> ([],e) | |
2218 | ||
2219 | (* sort of a hack, because there is no disj at top level *) | |
2220 | let transform_top (metavars,alts,name) e = | |
2221 | match Ast0.unwrap e with | |
2222 | Ast0.DECL(declstm) -> | |
2223 | (try | |
2224 | let strip alts = | |
2225 | List.map | |
2226 | (List.map | |
2227 | (function | |
2228 | Ast0.DotsStmtTag(d) -> | |
2229 | (match Ast0.unwrap d with | |
2230 | Ast0.DOTS([s]) -> Ast0.StmtTag(s) | |
2231 | | _ -> raise (Failure "")) | |
2232 | | _ -> raise (Failure ""))) | |
2233 | alts in | |
2234 | let (mv,s) = transform_stmt (metavars,strip alts,name) declstm in | |
2235 | (mv,Ast0.rewrap e (Ast0.DECL(s))) | |
2236 | with Failure _ -> ([],e)) | |
2237 | | Ast0.CODE(stmts) -> | |
2238 | let (mv,res) = | |
2239 | match alts with | |
2240 | (Ast0.DotsStmtTag(_)::_)::_ -> | |
2241 | (* start line is given to any leaves in the iso code *) | |
2242 | let start_line = Some ((Ast0.get_info e).Ast0.line_start) in | |
2243 | let alts = | |
2244 | List.map | |
2245 | (List.map | |
2246 | (function | |
2247 | Ast0.DotsStmtTag(p) -> | |
2248 | (p,count_edots.V0.combiner_statement_dots p, | |
2249 | count_idots.V0.combiner_statement_dots p, | |
2250 | count_dots.V0.combiner_statement_dots p) | |
2251 | | _ -> failwith "invalid alt")) | |
2252 | alts in | |
2253 | mkdisj match_statement_dots metavars alts stmts | |
2254 | (function b -> function mv_b -> | |
2255 | (instantiate b mv_b).V0.rebuilder_statement_dots) | |
2256 | (function s -> Ast0.DotsStmtTag s) | |
2257 | (function x -> | |
2258 | Ast0.rewrap e (Ast0.DOTS([make_disj_stmt_list x]))) | |
2259 | (function x -> | |
2260 | make_minus.V0.rebuilder_statement_dots x) | |
2261 | (rebuild_mcode start_line).V0.rebuilder_statement_dots | |
2262 | name Unparse_ast0.statement_dots extra_copy_other_plus do_nothing | |
2263 | | _ -> ([],stmts) in | |
2264 | (mv,Ast0.rewrap e (Ast0.CODE res)) | |
2265 | | _ -> ([],e) | |
2266 | ||
2267 | (* --------------------------------------------------------------------- *) | |
2268 | ||
2269 | let transform (alts : isomorphism) t = | |
2270 | (* the following ugliness is because rebuilder only returns a new term *) | |
2271 | let extra_meta_decls = ref ([] : Ast_cocci.metavar list) in | |
2272 | let mcode x = x in | |
2273 | let donothing r k e = k e in | |
2274 | let exprfn r k e = | |
2275 | let (extra_meta,exp) = transform_expr alts (k e) in | |
2276 | extra_meta_decls := extra_meta @ !extra_meta_decls; | |
2277 | exp in | |
2278 | ||
2279 | let declfn r k e = | |
2280 | let (extra_meta,dec) = transform_decl alts (k e) in | |
2281 | extra_meta_decls := extra_meta @ !extra_meta_decls; | |
2282 | dec in | |
2283 | ||
2284 | let stmtfn r k e = | |
2285 | let (extra_meta,stm) = transform_stmt alts (k e) in | |
2286 | extra_meta_decls := extra_meta @ !extra_meta_decls; | |
2287 | stm in | |
2288 | ||
2289 | let typefn r k e = | |
2290 | let continue = | |
2291 | match Ast0.unwrap e with | |
2292 | Ast0.Signed(signb,tyb) -> | |
2293 | (* Hack! How else to prevent iso from applying under an | |
2294 | unsigned??? *) | |
2295 | e | |
2296 | | _ -> k e in | |
2297 | let (extra_meta,ty) = transform_type alts continue in | |
2298 | extra_meta_decls := extra_meta @ !extra_meta_decls; | |
2299 | ty in | |
2300 | ||
2301 | let topfn r k e = | |
2302 | let (extra_meta,ty) = transform_top alts (k e) in | |
2303 | extra_meta_decls := extra_meta @ !extra_meta_decls; | |
2304 | ty in | |
2305 | ||
2306 | let res = | |
2307 | V0.rebuilder | |
2308 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
2309 | donothing donothing donothing donothing donothing donothing | |
2310 | donothing exprfn typefn donothing donothing declfn stmtfn | |
2311 | donothing topfn in | |
2312 | let res = res.V0.rebuilder_top_level t in | |
2313 | (!extra_meta_decls,res) | |
2314 | ||
2315 | (* --------------------------------------------------------------------- *) | |
2316 | ||
2317 | (* should be done by functorizing the parser to use wrap or context_wrap *) | |
2318 | let rewrap = | |
2319 | let mcode (x,a,i,mc,pos) = (x,a,i,Ast0.context_befaft(),pos) in | |
2320 | let donothing r k e = Ast0.context_wrap(Ast0.unwrap(k e)) in | |
2321 | V0.rebuilder | |
2322 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
2323 | donothing donothing donothing donothing donothing donothing | |
2324 | donothing donothing donothing donothing donothing donothing donothing | |
2325 | donothing donothing | |
2326 | ||
2327 | let rewrap_anything = function | |
2328 | Ast0.DotsExprTag(d) -> | |
2329 | Ast0.DotsExprTag(rewrap.V0.rebuilder_expression_dots d) | |
2330 | | Ast0.DotsInitTag(d) -> | |
2331 | Ast0.DotsInitTag(rewrap.V0.rebuilder_initialiser_list d) | |
2332 | | Ast0.DotsParamTag(d) -> | |
2333 | Ast0.DotsParamTag(rewrap.V0.rebuilder_parameter_list d) | |
2334 | | Ast0.DotsStmtTag(d) -> | |
2335 | Ast0.DotsStmtTag(rewrap.V0.rebuilder_statement_dots d) | |
2336 | | Ast0.DotsDeclTag(d) -> | |
2337 | Ast0.DotsDeclTag(rewrap.V0.rebuilder_declaration_dots d) | |
2338 | | Ast0.DotsCaseTag(d) -> | |
2339 | Ast0.DotsCaseTag(rewrap.V0.rebuilder_case_line_dots d) | |
2340 | | Ast0.IdentTag(d) -> Ast0.IdentTag(rewrap.V0.rebuilder_ident d) | |
2341 | | Ast0.ExprTag(d) -> Ast0.ExprTag(rewrap.V0.rebuilder_expression d) | |
2342 | | Ast0.ArgExprTag(d) -> Ast0.ArgExprTag(rewrap.V0.rebuilder_expression d) | |
2343 | | Ast0.TestExprTag(d) -> Ast0.TestExprTag(rewrap.V0.rebuilder_expression d) | |
2344 | | Ast0.TypeCTag(d) -> Ast0.TypeCTag(rewrap.V0.rebuilder_typeC d) | |
2345 | | Ast0.InitTag(d) -> Ast0.InitTag(rewrap.V0.rebuilder_initialiser d) | |
2346 | | Ast0.ParamTag(d) -> Ast0.ParamTag(rewrap.V0.rebuilder_parameter d) | |
2347 | | Ast0.DeclTag(d) -> Ast0.DeclTag(rewrap.V0.rebuilder_declaration d) | |
2348 | | Ast0.StmtTag(d) -> Ast0.StmtTag(rewrap.V0.rebuilder_statement d) | |
2349 | | Ast0.CaseLineTag(d) -> Ast0.CaseLineTag(rewrap.V0.rebuilder_case_line d) | |
2350 | | Ast0.TopTag(d) -> Ast0.TopTag(rewrap.V0.rebuilder_top_level d) | |
2351 | | Ast0.IsoWhenTag(_) | Ast0.IsoWhenTTag(_) | Ast0.IsoWhenFTag(_) -> | |
2352 | failwith "only for isos within iso phase" | |
2353 | | Ast0.MetaPosTag(p) -> Ast0.MetaPosTag(p) | |
2354 | ||
2355 | (* --------------------------------------------------------------------- *) | |
2356 | ||
2357 | let apply_isos isos rule rule_name = | |
2358 | if isos = [] | |
2359 | then ([],rule) | |
2360 | else | |
2361 | begin | |
2362 | current_rule := rule_name; | |
2363 | let isos = | |
2364 | List.map | |
2365 | (function (metavars,iso,name) -> | |
2366 | (metavars,List.map (List.map rewrap_anything) iso,name)) | |
2367 | isos in | |
2368 | let (extra_meta,rule) = | |
2369 | List.split | |
2370 | (List.map | |
2371 | (function t -> | |
2372 | List.fold_left | |
2373 | (function (extra_meta,t) -> function iso -> | |
2374 | let (new_extra_meta,t) = transform iso t in | |
2375 | (new_extra_meta@extra_meta,t)) | |
2376 | ([],t) isos) | |
2377 | rule) in | |
2378 | (List.concat extra_meta, Compute_lines.compute_lines rule) | |
2379 | end |