3 * Copyright (C) 2006, 2007, 2008 Ecole des Mines de Nantes
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License (GPL)
7 * version 2 as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * file license.txt for more details.
17 module TH
= Token_helpers
18 module LP
= Lexer_parser
20 module Stat
= Parsing_stat
22 (*****************************************************************************)
24 (*****************************************************************************)
26 if !Flag_parsing_c.verbose_parsing
30 if !Flag_parsing_c.verbose_parsing
31 then Common.pr2_once s
33 (*****************************************************************************)
35 (*****************************************************************************)
37 let lexbuf_to_strpos lexbuf
=
38 (Lexing.lexeme lexbuf
, Lexing.lexeme_start lexbuf
)
40 let token_to_strpos tok
=
41 (TH.str_of_tok tok
, TH.pos_of_tok tok
)
44 let error_msg_tok tok
=
45 let file = TH.file_of_tok tok
in
46 if !Flag_parsing_c.verbose_parsing
47 then Common.error_message
file (token_to_strpos tok
)
48 else ("error in " ^
file ^
"set verbose_parsing for more info")
51 let print_bad line_error
(start_line
, end_line
) filelines
=
53 pr2 ("badcount: " ^ i_to_s
(end_line
- start_line
));
55 for i
= start_line
to end_line
do
56 let line = filelines
.(i
) in
59 then pr2 ("BAD:!!!!!" ^
" " ^
line)
60 else pr2 ("bad:" ^
" " ^
line)
66 let mk_info_item2 filename toks
=
67 let buf = Buffer.create
100 in
69 (* old: get_slice_file filename (line1, line2) *)
71 toks
+> List.iter
(fun tok
->
72 match TH.pinfo_of_tok tok
with
73 | Ast_c.OriginTok _
->
74 Buffer.add_string
buf (TH.str_of_tok tok
)
75 | Ast_c.AbstractLineTok _
->
84 let mk_info_item a b
=
85 Common.profile_code
"C parsing.mk_info_item"
86 (fun () -> mk_info_item2 a b
)
89 let info_same_line line xs
=
90 xs
+> List.filter
(fun info
-> Ast_c.line_of_info info
= line)
93 (*****************************************************************************)
94 (* Stats on what was passed/commentized *)
95 (*****************************************************************************)
97 let commentized xs
= xs
+> Common.map_filter
(function
98 | Parser_c.TCommentCpp
(cppkind
, ii
) ->
99 let s = Ast_c.str_of_info ii
in
101 match !Flag_parsing_c.filter_passed_level
with
104 List.mem cppkind
[Token_c.CppAttr
]
108 List.mem cppkind
[Token_c.CppAttr
;Token_c.CppPassingNormal
]
112 List.mem cppkind
[Token_c.CppAttr
;Token_c.CppPassingNormal
;Token_c.CppDirective
]
116 List.mem cppkind
[Token_c.CppAttr
;Token_c.CppPassingNormal
;Token_c.CppMacro
]
122 List.mem cppkind
[Token_c.CppAttr
;Token_c.CppPassingNormal
;Token_c.CppDirective
;Token_c.CppMacro
]
129 | _
-> failwith
"not valid level passing number"
131 if legal_passing then None
else Some
(ii
.Ast_c.pinfo
)
136 | s when s =~ "KERN_.*" -> None
137 | s when s =~ "__.*" -> None
139 Some (ii.Ast_c.pinfo)
144 | Parser_c.TCommentMisc ii
145 | Parser_c.TAction ii
147 Some
(ii
.Ast_c.pinfo
)
152 let count_lines_commentized xs
=
153 let line = ref (-1) in
159 Ast_c.OriginTok pinfo
| Ast_c.ExpandedTok
(_
,(pinfo
,_
)) ->
160 let newline = pinfo
.Common.line in
172 let print_commentized xs
=
173 let line = ref (-1) in
175 let ys = commentized xs
in
179 Ast_c.OriginTok pinfo
| Ast_c.ExpandedTok
(_
,(pinfo
,_
)) ->
180 let newline = pinfo
.Common.line in
181 let s = pinfo
.Common.str
in
182 let s = Str.global_substitute
183 (Str.regexp
"\n") (fun s -> "") s
186 then prerr_string
(s ^
" ")
189 then pr2_no_nl
"passed:"
190 else pr2_no_nl
"\npassed:";
195 if not
(null
ys) then pr2 "";
201 (*****************************************************************************)
203 (*****************************************************************************)
205 (* called by parse_print_error_heuristic *)
207 let table = Common.full_charpos_to_pos
file in
209 Common.with_open_infile
file (fun chan
->
210 let lexbuf = Lexing.from_channel chan
in
212 let rec tokens_aux acc
=
213 let tok = Lexer_c.token
lexbuf in
214 (* fill in the line and col information *)
215 let tok = tok +> TH.visitor_info_of_tok
(fun ii
->
216 { ii
with Ast_c.pinfo
=
217 (* could assert pinfo.filename = file ? *)
218 match Ast_c.pinfo_of_info ii
with
219 Ast_c.OriginTok pi
->
220 Ast_c.OriginTok
(Common.complete_parse_info
file table pi
)
221 | Ast_c.ExpandedTok
(pi
,vpi
) ->
222 Ast_c.ExpandedTok
((Common.complete_parse_info
file table pi
),vpi
)
223 | Ast_c.FakeTok
(s,vpi
) -> Ast_c.FakeTok
(s,vpi
)
224 | Ast_c.AbstractLineTok pi
-> failwith
"should not occur"
229 then List.rev
(tok::acc
)
230 else tokens_aux (tok::acc
)
234 | Lexer_c.Lexical
s ->
235 failwith
("lexical error " ^
s ^
"\n =" ^
236 (Common.error_message
file (lexbuf_to_strpos lexbuf)))
240 let time_lexing ?
(profile
=true) a
=
242 then Common.profile_code_exclusif
"LEXING" (fun () -> tokens2 a
)
244 let tokens ?profile a
=
245 Common.profile_code
"C parsing.tokens" (fun () -> time_lexing ?profile a
)
248 let tokens_of_string string =
249 let lexbuf = Lexing.from_string
string in
251 let rec tokens_s_aux () =
252 let tok = Lexer_c.token
lexbuf in
255 else tok::(tokens_s_aux ())
259 | Lexer_c.Lexical
s -> failwith
("lexical error " ^
s ^
"\n =" )
263 (*****************************************************************************)
264 (* Parsing, but very basic, no more used *)
265 (*****************************************************************************)
268 * !!!Those function use refs, and are not reentrant !!! so take care.
269 * It use globals defined in Lexer_parser.
271 * update: because now lexer return comments tokens, those functions
272 * may not work anymore.
276 let lexbuf = Lexing.from_channel
(open_in
file) in
277 let result = Parser_c.main
Lexer_c.token
lexbuf in
281 let parse_print_error file =
282 let chan = (open_in
file) in
283 let lexbuf = Lexing.from_channel
chan in
285 let error_msg () = Common.error_message
file (lexbuf_to_strpos lexbuf) in
287 lexbuf +> Parser_c.main
Lexer_c.token
289 | Lexer_c.Lexical
s ->
290 failwith
("lexical error " ^
s^
"\n =" ^
error_msg ())
291 | Parsing.Parse_error
->
292 failwith
("parse error \n = " ^
error_msg ())
293 | Semantic_c.Semantic
(s, i
) ->
294 failwith
("semantic error " ^
s ^
"\n =" ^
error_msg ())
300 (*****************************************************************************)
301 (* Parsing subelements, useful to debug parser *)
302 (*****************************************************************************)
305 * !!!Those function use refs, and are not reentrant !!! so take care.
306 * It use globals defined in Lexer_parser.
311 * let parse_gen parsefunc s =
312 * let lexbuf = Lexing.from_string s in
313 * let result = parsefunc Lexer_c.token lexbuf in
317 let parse_gen parsefunc
s =
318 let toks = tokens_of_string s +> List.filter
TH.is_not_comment
in
321 (* Why use this lexing scheme ? Why not classically give lexer func
322 * to parser ? Because I now keep comments in lexer. Could
323 * just do a simple wrapper that when comment ask again for a token,
324 * but maybe simpler to use cur_tok technique.
326 let all_tokens = ref toks in
327 let cur_tok = ref (List.hd
!all_tokens) in
331 if TH.is_eof
!cur_tok
332 then (pr2 "LEXER: ALREADY AT END"; !cur_tok)
334 let v = Common.pop2
all_tokens in
339 let lexbuf_fake = Lexing.from_function
(fun buf n
-> raise Impossible
) in
340 let result = parsefunc
lexer_function lexbuf_fake in
344 let type_of_string = parse_gen Parser_c.type_name
345 let statement_of_string = parse_gen Parser_c.statement
346 let expression_of_string = parse_gen Parser_c.expr
348 (* ex: statement_of_string "(struct us_data* )psh->hostdata = NULL;" *)
354 (*****************************************************************************)
355 (* Consistency checking *)
356 (*****************************************************************************)
359 * could check that an ident has always the same class, be it a typedef
360 * (but sometimes do 'acpi_val acpi_val;'), an ident, a TMacroStatement,
365 | CIdent
(* can be var, func, field, tag, enum constant *)
368 let str_of_class_ident = function
370 | CTypedef
-> "Typedef"
380 (* but take care that must still be able to use '=' *)
381 type context
= InFunction
| InEnum
| InStruct
| InInitializer
| InParams
383 | CIdent
of class_ident
387 | CCommentCpp
of cppkind
397 | CReservedKwd
(type | decl
| qualif
| flow
| misc
| attr
)
400 (* parse_typedef_fix4 *)
401 let consistency_checking2 xs
=
403 (* first phase, gather data *)
404 let stat = Hashtbl.create
101 in
406 (* default value for hash *)
407 let v1 () = Hashtbl.create
101 in
410 let bigf = { Visitor_c.default_visitor_c
with
412 Visitor_c.kexpr
= (fun (k
,bigf) x
->
413 match Ast_c.unwrap_expr x
with
416 Common.hfind_default
s v1 +> Common.hfind_default CIdent
v2 +>
417 (fun aref
-> incr aref
)
421 Visitor_c.ktype
= (fun (k
,bigf) t
->
422 match Ast_c.unwrap_typeC t
with
423 | Ast_c.TypeName
(s,_typ
) ->
425 Common.hfind_default
s v1 +> Common.hfind_default CTypedef
v2 +>
426 (fun aref
-> incr aref
)
432 xs
+> List.iter
(fun (p
, info_item
) -> Visitor_c.vk_toplevel
bigf p
);
435 let ident_to_type = ref [] in
438 (* second phase, analyze data *)
439 stat +> Hashtbl.iter
(fun k
v ->
440 let xs = Common.hash_to_list
v in
441 if List.length
xs >= 2
443 pr2 ("CONFLICT:" ^ k
);
444 let sorted = xs +> List.sort
(fun (ka
,va
) (kb
,vb
) ->
447 | CTypedef
, _
-> 1 (* first is smaller *)
453 let sorted = List.rev
sorted in
455 | [CTypedef
, i1
;CIdent
, i2
] ->
456 pr2 ("transforming some ident in typedef");
457 push2 k
ident_to_type;
459 pr2 ("TODO:other transforming?");
464 (* third phase, update ast.
465 * todo? but normally should try to handle correctly scope ? maybe sometime
466 * sizeof(id) and even if id was for a long time an identifier, maybe
467 * a few time, because of the scope it's actually really a type.
469 if (null
!ident_to_type)
472 let bigf = { Visitor_c.default_visitor_c_s
with
473 Visitor_c.kdefineval_s
= (fun (k
,bigf) x
->
475 | Ast_c.DefineExpr e
->
477 | (Ast_c.Ident
s, _
), ii
when List.mem
s !ident_to_type ->
479 (Ast_c.TypeName
(s, Ast_c.noTypedefDef
()), ii
)) in
486 Visitor_c.kexpr_s
= (fun (k
, bigf) x
->
488 | (Ast_c.SizeOfExpr e
, tref
), isizeof
->
489 let i1 = tuple_of_list1 isizeof
in
491 | (Ast_c.ParenExpr e
, _
), iiparen
->
493 | (Ast_c.Ident
s, _
), ii
when List.mem
s !ident_to_type ->
494 let (i2
, i3
) = tuple_of_list2 iiparen
in
496 (Ast_c.TypeName
(s, Ast_c.noTypedefDef
()), ii
)) in
497 (Ast_c.SizeOfType
t, tref
), [i1;i2
;i3
]
506 xs +> List.map
(fun (p
, info_item
) ->
507 Visitor_c.vk_toplevel_s
bigf p
, info_item
511 let consistency_checking a
=
512 Common.profile_code
"C consistencycheck" (fun () -> consistency_checking2 a
)
516 (*****************************************************************************)
518 (*****************************************************************************)
520 (* todo: do something if find Parser_c.Eof ? *)
521 let rec find_next_synchro next already_passed
=
523 (* Maybe because not enough }, because for example an ifdef contains
524 * in both branch some opening {, we later eat too much, "on deborde
525 * sur la fonction d'apres". So already_passed may be too big and
526 * looking for next synchro point starting from next may not be the
527 * best. So maybe we can find synchro point inside already_passed
528 * instead of looking in next.
530 * But take care! must progress. We must not stay in infinite loop!
531 * For instance now I have as a error recovery to look for
532 * a "start of something", corresponding to start of function,
533 * but must go beyond this start otherwise will loop.
534 * So look at premier(external_declaration2) in parser.output and
535 * pass at least those first tokens.
537 * I have chosen to start search for next synchro point after the
538 * first { I found, so quite sure we will not loop. *)
540 let last_round = List.rev already_passed
in
542 let xs = last_round +> List.filter
TH.is_not_comment
in
544 | Parser_c.TDefine _
::_
-> true
548 then find_next_synchro_define
(last_round ++ next
) []
551 let (before
, after
) =
552 last_round +> Common.span
(fun tok ->
554 (* by looking at TOBrace we are sure that the "start of something"
555 * will not arrive too early
557 | Parser_c.TOBrace _
-> false
558 | Parser_c.TDefine _
-> false
562 find_next_synchro_orig
(after
++ next
) (List.rev before
)
566 and find_next_synchro_define next already_passed
=
569 pr2 "ERROR-RECOV: end of file while in recovery mode";
571 | (Parser_c.TDefEOL i
as v)::xs ->
572 pr2 ("ERROR-RECOV: found sync end of #define, line "^i_to_s
(TH.line_of_tok
v));
573 v::already_passed
, xs
575 find_next_synchro_define
xs (v::already_passed
)
580 and find_next_synchro_orig next already_passed
=
583 pr2 "ERROR-RECOV: end of file while in recovery mode";
586 | (Parser_c.TCBrace i
as v)::xs when TH.col_of_tok
v = 0 ->
587 pr2 ("ERROR-RECOV: found sync '}' at line "^i_to_s
(TH.line_of_tok
v));
590 | [] -> raise Impossible
(* there is a EOF token normally *)
592 (* still useful: now parser.mly allow empty ';' so normally no pb *)
593 | Parser_c.TPtVirg iptvirg
::xs ->
594 pr2 "ERROR-RECOV: found sync bis, eating } and ;";
595 (Parser_c.TPtVirg iptvirg
)::v::already_passed
, xs
597 | Parser_c.TIdent x
::Parser_c.TPtVirg iptvirg
::xs ->
598 pr2 "ERROR-RECOV: found sync bis, eating ident, }, and ;";
599 (Parser_c.TPtVirg iptvirg
)::(Parser_c.TIdent x
)::v::already_passed
,
602 | Parser_c.TCommentSpace sp
::Parser_c.TIdent x
::Parser_c.TPtVirg iptvirg
604 pr2 "ERROR-RECOV: found sync bis, eating ident, }, and ;";
605 (Parser_c.TCommentSpace sp
)::
606 (Parser_c.TPtVirg iptvirg
)::
607 (Parser_c.TIdent x
)::
612 | Parser_c.TCommentNewline sp
::Parser_c.TIdent x
::Parser_c.TPtVirg iptvirg
614 pr2 "ERROR-RECOV: found sync bis, eating ident, }, and ;";
615 (Parser_c.TCommentNewline sp
)::
616 (Parser_c.TPtVirg iptvirg
)::
617 (Parser_c.TIdent x
)::
623 v::already_passed
, xs
625 | v::xs when TH.col_of_tok
v = 0 && TH.is_start_of_something
v ->
626 pr2 ("ERROR-RECOV: found sync col 0 at line "^ i_to_s
(TH.line_of_tok
v));
627 already_passed
, v::xs
630 find_next_synchro_orig
xs (v::already_passed
)
633 (*****************************************************************************)
634 (* Include/Define hacks *)
635 (*****************************************************************************)
637 (* Sometimes I prefer to generate a single token for a list of things in the
638 * lexer so that if I have to passed them, like for passing TInclude then
639 * it's easy. Also if I don't do a single token, then I need to
640 * parse the rest which may not need special stuff, like detecting
641 * end of line which the parser is not really ready for. So for instance
642 * could I parse a #include <a/b/c/xxx.h> as 2 or more tokens ? just
643 * lex #include ? so then need recognize <a/b/c/xxx.h> as one token ?
644 * but this kind of token is valid only after a #include and the
645 * lexing and parsing rules are different for such tokens so not that
646 * easy to parse such things in parser_c.mly. Hence the following hacks.
648 * less?: maybe could get rid of this like I get rid of some of fix_define.
651 (* ------------------------------------------------------------------------- *)
653 (* ------------------------------------------------------------------------- *)
655 (* used to generate new token from existing one *)
656 let new_info posadd str ii
=
658 Ast_c.OriginTok
{ (Ast_c.parse_info_of_info ii
) with
659 charpos
= Ast_c.pos_of_info ii
+ posadd
;
661 column
= Ast_c.col_of_info ii
+ posadd
;
663 (* must generate a new ref each time, otherwise share *)
664 cocci_tag
= ref Ast_c.emptyAnnot
;
665 comments_tag
= ref Ast_c.emptyComments
;
669 let rec comment_until_defeol xs =
671 | [] -> failwith
"cant find end of define token TDefEOL"
674 | Parser_c.TDefEOL i
->
675 Parser_c.TCommentCpp
(Token_c.CppDirective
, TH.info_of_tok x
)
679 (* bugfix: otherwise may lose a TComment token *)
680 if TH.is_real_comment
x
682 else Parser_c.TCommentCpp
(Token_c.CppPassingNormal
(*good?*), TH.info_of_tok
x)
684 x'
::comment_until_defeol xs
687 let drop_until_defeol xs =
689 (Common.drop_until
(function Parser_c.TDefEOL _
-> true | _
-> false) xs)
693 (* ------------------------------------------------------------------------- *)
694 (* returns a pair (replaced token, list of next tokens) *)
695 (* ------------------------------------------------------------------------- *)
697 let tokens_include (info
, includes
, filename
, inifdef
) =
698 Parser_c.TIncludeStart
(Ast_c.rewrap_str includes info
, inifdef
),
699 [Parser_c.TIncludeFilename
700 (filename
, (new_info (String.length includes
) filename info
))
703 (*****************************************************************************)
704 (* Parsing default define macros, usually in a standard.h file *)
705 (*****************************************************************************)
707 let parse_cpp_define_file2 file =
708 let toks = tokens ~profile
:false file in
709 let toks = Parsing_hacks.fix_tokens_define
toks in
710 Parsing_hacks.extract_cpp_define
toks
712 let parse_cpp_define_file a
=
713 Common.profile_code_exclusif
"HACK" (fun () -> parse_cpp_define_file2 a
)
715 (* can not be put in parsing_hack, cos then mutually recursive problem as
716 * we also want to parse the standard.h file.
718 let init_defs std_h
=
719 if not
(Common.lfile_exists std_h
)
720 then pr2 ("warning: Can't find default macro file: " ^ std_h
)
722 pr2 ("init_defs: " ^ std_h
);
723 Parsing_hacks._defs
:= Common.hash_of_list
(parse_cpp_define_file std_h
);
727 (*****************************************************************************)
728 (* Main entry point *)
729 (*****************************************************************************)
731 type info_item
= string * Parser_c.token list
733 type program2
= toplevel2 list
734 and toplevel2
= Ast_c.toplevel
* info_item
736 let program_of_program2 xs =
739 let with_program2 f program2
=
742 +> (fun (program
, infos
) ->
745 +> Common.uncurry
Common.zip
749 (* The use of local refs (remaining_tokens, passed_tokens, ...) makes
750 * possible error recovery. Indeed, they allow to skip some tokens and
751 * still be able to call again the ocamlyacc parser. It is ugly code
752 * because we cant modify ocamllex and ocamlyacc. As we want some
753 * extended lexing tricks, we have to use such refs.
755 * Those refs are now also used for my lalr(k) technique. Indeed They
756 * store the futur and previous tokens that were parsed, and so
757 * provide enough context information for powerful lex trick.
759 * - passed_tokens_last_ckp stores the passed tokens since last
760 * checkpoint. Used for NotParsedCorrectly and also to build the
761 * info_item attached to each program_element.
762 * - passed_tokens_clean is used for lookahead, in fact for lookback.
763 * - remaining_tokens_clean is used for lookahead. Now remaining_tokens
764 * contain some comments and so would make pattern matching difficult
765 * in lookahead. Hence this variable. We would like also to get rid
766 * of cpp instruction because sometimes a cpp instruction is between
767 * two tokens and makes a pattern matching fail. But lookahead also
768 * transform some cpp instruction (in comment) so can't remove them.
770 * So remaining_tokens, passed_tokens_last_ckp contain comment-tokens,
771 * whereas passed_tokens_clean and remaining_tokens_clean does not contain
775 * toks = (reverse passed_tok) ++ cur_tok ++ remaining_tokens
776 * after the call to pop2.
777 * toks = (reverse passed_tok) ++ remaining_tokens
778 * at the and of the lexer_function call.
779 * At the very beginning, cur_tok and remaining_tokens overlap, but not after.
780 * At the end of lexer_function call, cur_tok overlap with passed_tok.
782 * convention: I use "tr" for "tokens refs"
784 * I now also need this lexing trick because the lexer return comment
788 type tokens_state
= {
789 mutable rest
: Parser_c.token list
;
790 mutable rest_clean
: Parser_c.token list
;
791 mutable current
: Parser_c.token
;
792 (* it's passed since last "checkpoint", not passed from the beginning *)
793 mutable passed
: Parser_c.token list
;
794 mutable passed_clean
: Parser_c.token list
;
796 let clone_tokens_stat tr
=
798 rest_clean
= tr
.rest_clean
;
799 current
= tr
.current
;
801 passed_clean
= tr
.passed_clean
;
803 let copy_tokens_stat ~src ~dst
=
804 dst
.rest
<- src
.rest
;
805 dst
.rest_clean
<- src
.rest_clean
;
806 dst
.current
<- src
.current
;
807 dst
.passed
<- src
.passed
;
808 dst
.passed_clean
<- src
.passed_clean
;
811 let rec filter_noise n
xs =
817 | Parser_c.TMacroAttr _
->
818 filter_noise (n
-1) xs
820 x::filter_noise (n
-1) xs
823 let clean_for_lookahead xs =
828 x::filter_noise 10 xs
832 (* Hacked lex. This function use refs passed by parse_print_error_heuristic
833 * tr means token refs.
835 let rec lexer_function ~pass tr
= fun lexbuf ->
837 | [] -> pr2 "ALREADY AT END"; tr
.current
842 if !Flag_parsing_c.debug_lexer
then Common.pr2_gen
v;
846 tr
.passed
<- v::tr
.passed
;
847 lexer_function ~pass tr
lexbuf
850 let x = List.hd tr
.rest_clean
in
851 tr
.rest_clean
<- List.tl tr
.rest_clean
;
858 * Why not in parsing_hacks lookahead and do passing like
859 * I do for some ifdef directives ? Because here I also need to
860 * generate some tokens sometimes and so I need access to the
861 * tr.passed, tr.rest, etc.
863 | Parser_c.TDefine
(tok) ->
864 if not
(LP.current_context
() = LP.InTopLevel
) &&
865 (!Flag_parsing_c.cpp_directive_passing
|| (pass
= 2))
867 incr
Stat.nDefinePassing
;
868 pr2_once ("CPP-DEFINE: inside function, I treat it as comment");
869 let v'
= Parser_c.TCommentCpp
(Token_c.CppDirective
,TH.info_of_tok
v)
871 tr
.passed
<- v'
::tr
.passed
;
872 tr
.rest
<- comment_until_defeol tr
.rest
;
873 tr
.rest_clean
<- drop_until_defeol tr
.rest_clean
;
874 lexer_function ~pass tr
lexbuf
877 tr
.passed
<- v::tr
.passed
;
878 tr
.passed_clean
<- v::tr
.passed_clean
;
882 | Parser_c.TInclude
(includes
, filename
, inifdef
, info
) ->
883 if not
(LP.current_context
() = LP.InTopLevel
) &&
884 (!Flag_parsing_c.cpp_directive_passing
|| (pass
= 2))
886 incr
Stat.nIncludePassing
;
887 pr2_once ("CPP-INCLUDE: inside function, I treat it as comment");
888 let v = Parser_c.TCommentCpp
(Token_c.CppDirective
, info
) in
889 tr
.passed
<- v::tr
.passed
;
890 lexer_function ~pass tr
lexbuf
894 tokens_include (info
, includes
, filename
, inifdef
) in
895 let new_tokens_clean =
896 new_tokens
+> List.filter
TH.is_not_comment
in
898 tr
.passed
<- v::tr
.passed
;
899 tr
.passed_clean
<- v::tr
.passed_clean
;
900 tr
.rest
<- new_tokens
++ tr
.rest
;
901 tr
.rest_clean
<- new_tokens_clean ++ tr
.rest_clean
;
909 | Parser_c.TIdent
(s, ii
) ->
912 not
(!Flag_parsing_c.disable_add_typedef
) &&
914 then Parser_c.TypedefIdent
(s, ii
)
915 else Parser_c.TIdent
(s, ii
)
919 let v = Parsing_hacks.lookahead ~pass
920 (clean_for_lookahead (v::tr
.rest_clean
))
923 tr
.passed
<- v::tr
.passed
;
925 (* the lookahead may have changed the status of the token and
926 * consider it as a comment, for instance some #include are
927 * turned into comments, hence this code. *)
929 | Parser_c.TCommentCpp _
-> lexer_function ~pass tr
lexbuf
931 tr
.passed_clean
<- v::tr
.passed_clean
;
938 let get_one_elem ~pass tr
(file, filelines
) =
940 if not
(LP.is_enabled_typedef
()) && !Flag_parsing_c.debug_typedef
941 then pr2 "TYPEDEF:_handle_typedef=false. Not normal if dont come from exn";
943 (* normally have to do that only when come from an exception in which
944 * case the dt() may not have been done
945 * TODO but if was in scoped scope ? have to let only the last scope
946 * so need do a LP.lexer_reset_typedef ();
949 LP._lexer_hint
:= (LP.default_hint
());
950 LP.save_typedef_state
();
954 let lexbuf_fake = Lexing.from_function
(fun buf n
-> raise Impossible
) in
957 (* -------------------------------------------------- *)
959 (* -------------------------------------------------- *)
960 Common.profile_code_exclusif
"YACC" (fun () ->
961 Left
(Parser_c.celem
(lexer_function ~pass tr
) lexbuf_fake)
964 if (pass
= 1 && !Flag_parsing_c.disable_two_pass
)|| (pass
= 2)
967 (* Lexical is not anymore launched I think *)
968 | Lexer_c.Lexical
s ->
969 pr2 ("lexical error " ^
s^
"\n =" ^
error_msg_tok tr
.current
)
970 | Parsing.Parse_error
->
971 pr2 ("parse error \n = " ^
error_msg_tok tr
.current
)
972 | Semantic_c.Semantic
(s, i
) ->
973 pr2 ("semantic error " ^
s^
"\n ="^
error_msg_tok tr
.current
)
977 LP.restore_typedef_state
();
979 (* must keep here, before the code that adjusts the tr fields *)
980 let line_error = TH.line_of_tok tr
.current
in
983 (* error recovery, go to next synchro point *)
984 let (passed'
, rest'
) = find_next_synchro tr
.rest tr
.passed
in
986 tr
.passed
<- passed'
;
988 tr
.current
<- List.hd passed'
;
989 tr
.passed_clean
<- []; (* enough ? *)
990 (* with error recovery, rest and rest_clean may not be in sync *)
991 tr
.rest_clean
<- (tr
.rest
+> List.filter
TH.is_not_comment
);
994 let info_of_bads = Common.map_eff_rev
TH.info_of_tok tr
.passed
in
995 Right
(info_of_bads, line_error, tr
.passed
)
1002 (* note: as now we go in 2 passes, there is first all the error message of
1003 * the lexer, and then the error of the parser. It is not anymore
1006 * !!!This function use refs, and is not reentrant !!! so take care.
1007 * It use globals defined in Lexer_parser and also the _defs global
1008 * in parsing_hack.ml.
1010 * This function uses internally some semi globals in the
1011 * tokens_stat record and parsing_stat record.
1014 let parse_print_error_heuristic2 file =
1016 let filelines = Common.cat_array
file in
1017 let stat = Parsing_stat.default_stat
file in
1019 (* -------------------------------------------------- *)
1020 (* call lexer and get all the tokens *)
1021 (* -------------------------------------------------- *)
1022 LP.lexer_reset_typedef
();
1023 Parsing_hacks.ifdef_paren_cnt
:= 0;
1024 let toks_orig = tokens file in
1026 let toks = Parsing_hacks.fix_tokens_define
toks_orig in
1027 let toks = Parsing_hacks.fix_tokens_cpp
toks in
1031 rest_clean
= (toks +> List.filter
TH.is_not_comment
);
1032 current
= (List.hd
toks);
1042 (* todo?: I am not sure that it represents current_line, cos maybe
1043 * tr.current partipated in the previous parsing phase, so maybe tr.current
1044 * is not the first token of the next parsing phase. Same with checkpoint2.
1045 * It would be better to record when we have a } or ; in parser.mly,
1046 * cos we know that they are the last symbols of external_declaration2.
1048 * bugfix: may not be equal to 'file' as after macro expansions we can
1049 * start to parse a new entity from the body of a macro, for instance
1050 * when parsing a define_machine() body, cf standard.h
1052 let checkpoint = TH.line_of_tok
tr.current
in
1053 let checkpoint_file = TH.file_of_tok
tr.current
in
1055 let tr_save = clone_tokens_stat tr in
1057 (* call the parser *)
1059 let pass1 = get_one_elem ~pass
:1 tr (file, filelines) in
1063 if !Flag_parsing_c.disable_two_pass
1066 pr2 "parsing pass2: try again";
1067 copy_tokens_stat ~src
:tr_save ~dst
: tr;
1068 let pass2 = get_one_elem ~pass
:2 tr (file, filelines) in
1074 (* again not sure if checkpoint2 corresponds to end of bad region *)
1075 let checkpoint2 = TH.line_of_tok
tr.current
in (* <> line_error *)
1076 let checkpoint2_file = TH.file_of_tok
tr.current
in
1081 | Right
(_
, line_error, _
) ->
1083 let xs = tr.passed
+> List.rev
+> List.filter
TH.is_not_comment
in
1084 if List.length
xs >= 2
1086 (match Common.head_middle_tail
xs with
1087 | Parser_c.TDefine _
, _
, Parser_c.TDefEOL _
->
1092 pr2 "WEIRD: length list of error recovery tokens < 2 ";
1096 (if was_define && !Flag_parsing_c.filter_msg_define_error
1100 if (checkpoint_file = checkpoint2_file) && checkpoint_file = file
1101 then print_bad line_error (checkpoint, checkpoint2) filelines
1102 else pr2 "PB: bad: but on tokens not from original file"
1109 if (checkpoint_file = checkpoint2_file) && (checkpoint_file = file)
1110 then (checkpoint2 - checkpoint)
1112 (* TODO? so if error come in middle of something ? where the
1113 * start token was from original file but synchro found in body
1114 * of macro ? then can have wrong number of lines stat.
1115 * Maybe simpler just to look at tr.passed and count
1116 * the lines in the token from the correct file ?
1119 let info = mk_info_item file (List.rev
tr.passed
) in
1121 (* some stat updates *)
1122 stat.Stat.commentized <-
1123 stat.Stat.commentized + count_lines_commentized (snd
info);
1128 stat.Stat.correct
<- stat.Stat.correct
+ diffline;
1130 | Right
(info_of_bads, line_error, toks_of_bads
) ->
1131 if was_define && !Flag_parsing_c.filter_define_error
1132 then stat.Stat.correct
<- stat.Stat.correct
+ diffline
1133 else stat.Stat.bad
<- stat.Stat.bad
+ diffline;
1137 +> Common.filter
(TH.is_same_line_or_close
line_error)
1138 +> Common.filter
TH.is_ident_like
1141 (pbline +> List.map
TH.str_of_tok
), line_error
1143 stat.Stat.problematic_lines
<-
1144 error_info::stat.Stat.problematic_lines
;
1146 Ast_c.NotParsedCorrectly
info_of_bads
1150 | Ast_c.FinalDef
x -> [(Ast_c.FinalDef
x, info)]
1151 | xs -> (xs, info):: loop tr (* recurse *)
1155 let v = consistency_checking v in
1159 let time_total_parsing a
=
1160 Common.profile_code
"TOTAL" (fun () -> parse_print_error_heuristic2 a
)
1162 let parse_print_error_heuristic a
=
1163 Common.profile_code
"C parsing" (fun () -> time_total_parsing a
)
1167 let parse_c_and_cpp a
= parse_print_error_heuristic a
1169 (*****************************************************************************)
1170 (* Same but faster cos memoize stuff *)
1171 (*****************************************************************************)
1172 let parse_cache file =
1173 if not
!Flag_parsing_c.use_cache
then parse_print_error_heuristic file
1175 let _ = pr2 "TOFIX" in
1176 let need_no_changed_files =
1177 (* should use Sys.argv.(0), would be safer. *)
1181 Config.path ^ "/parsing_c/c_parser.cma";
1182 (* we may also depend now on the semantic patch because
1183 the SP may use macro and so we will disable some of the
1184 macro expansions from standard.h.
1190 let need_no_changed_variables =
1191 (* could add some of the flags of flag_parsing_c.ml *)
1194 Common.cache_computation_robust
1196 (need_no_changed_files, need_no_changed_variables) ".depend_raw"
1197 (fun () -> parse_print_error_heuristic file)
1201 (*****************************************************************************)
1202 (* Some special cases *)
1203 (*****************************************************************************)
1205 let (cstatement_of_string
: string -> Ast_c.statement
) = fun s ->
1206 Common.write_file
("/tmp/__cocci.c") ("void main() { \n" ^
s ^
"\n}");
1207 let program = parse_c_and_cpp ("/tmp/__cocci.c") +> fst
in
1208 program +> Common.find_some
(fun (e
,_) ->
1210 | Ast_c.Definition
({Ast_c.f_body
= [Ast_c.StmtElem st
]},_) -> Some st
1214 let (cexpression_of_string
: string -> Ast_c.expression
) = fun s ->
1215 Common.write_file
("/tmp/__cocci.c") ("void main() { \n" ^
s ^
";\n}");
1216 let program = parse_c_and_cpp ("/tmp/__cocci.c") +> fst
in
1217 program +> Common.find_some
(fun (e
,_) ->
1219 | Ast_c.Definition
({Ast_c.f_body
= compound
},_) ->
1220 (match compound
with
1221 | [Ast_c.StmtElem
(Ast_c.ExprStatement
(Some e
),ii
)] -> Some e