parsing_cocci/ast0_cocci.mli

   1 (*
   2  * Copyright 2010, INRIA, University of Copenhagen
   3  * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix
   4  * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
   5  * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
   6  * This file is part of Coccinelle.
   7  *
   8  * Coccinelle is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, according to version 2 of the License.
  11  *
  12  * Coccinelle is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Coccinelle.  If not, see <http://www.gnu.org/licenses/>.
  19  *
  20  * The authors reserve the right to distribute this or future versions of
  21  * Coccinelle under other licenses.
  22  *)
  23
  24
  25 (* --------------------------------------------------------------------- *)
  26 (* Modified code *)
  27
  28 type arity = OPT | UNIQUE | NONE
  29
  30 type token_info =
  31     { tline_start : int; tline_end : int;
  32       left_offset : int; right_offset : int }
  33 val default_token_info : token_info
  34
  35 type mcodekind =
  36     MINUS       of (Ast_cocci.anything list list * token_info) ref
  37   | PLUS        of Ast_cocci.count
  38   | CONTEXT     of (Ast_cocci.anything Ast_cocci.befaft *
  39                       token_info * token_info) ref
  40   | MIXED       of (Ast_cocci.anything Ast_cocci.befaft *
  41                       token_info * token_info) ref
  42
  43 type position_info = { line_start : int; line_end : int;
  44                        logical_start : int; logical_end : int;
  45                        column : int; offset : int; }
  46
  47 type info = { pos_info : position_info;
  48               attachable_start : bool; attachable_end : bool;
  49               mcode_start : mcodekind list; mcode_end : mcodekind list;
  50               (* the following are only for + code *)
  51               strings_before : (Ast_cocci.added_string * position_info) list;
  52               strings_after : (Ast_cocci.added_string * position_info) list }
  53
  54 type 'a mcode =
  55     'a * arity * info * mcodekind * meta_pos ref (* pos, - only *) *
  56       int (* adjacency_index *)
  57
  58 and 'a wrap =
  59     { node : 'a;
  60       info : info;
  61       index : int ref;
  62       mcodekind : mcodekind ref;
  63       exp_ty : Type_cocci.typeC option ref; (* only for expressions *)
  64       bef_aft : dots_bef_aft; (* only for statements *)
  65       true_if_arg : bool; (* true if "arg_exp", only for exprs *)
  66       true_if_test : bool; (* true if "test position", only for exprs *)
  67       true_if_test_exp : bool;(* true if "test_exp from iso", only for exprs *)
  68       (*nonempty if this represents the use of an iso*)
  69       iso_info : (string*anything) list }
  70
  71 and dots_bef_aft =
  72     NoDots | AddingBetweenDots of statement | DroppingBetweenDots of statement
  73
  74 (* for iso metavariables, true if they can only match nonmodified, unitary
  75    metavariables
  76    for SP metavariables, true if the metavariable is unitary (valid up to
  77    isomorphism phase only) *)
  78 and pure = Impure | Pure | Context | PureContext (* pure and only context *)
  79
  80 (* --------------------------------------------------------------------- *)
  81 (* --------------------------------------------------------------------- *)
  82 (* Dots *)
  83
  84 and 'a base_dots =
  85     DOTS of 'a list
  86   | CIRCLES of 'a list
  87   | STARS of 'a list
  88
  89 and 'a dots = 'a base_dots wrap
  90
  91 (* --------------------------------------------------------------------- *)
  92 (* Identifier *)
  93
  94 and base_ident =
  95     Id            of string mcode
  96   | MetaId        of Ast_cocci.meta_name mcode * Ast_cocci.idconstraint * pure
  97   | MetaFunc      of Ast_cocci.meta_name mcode * Ast_cocci.idconstraint * pure
  98   | MetaLocalFunc of Ast_cocci.meta_name mcode * Ast_cocci.idconstraint * pure
  99   | DisjId        of string mcode * ident list *
 100                      string mcode list (* the |s *) * string mcode
 101   | OptIdent      of ident
 102   | UniqueIdent   of ident
 103
 104 and ident = base_ident wrap
 105
 106 (* --------------------------------------------------------------------- *)
 107 (* Expression *)
 108
 109 and base_expression =
 110     Ident          of ident
 111   | Constant       of Ast_cocci.constant mcode
 112   | FunCall        of expression * string mcode (* ( *) *
 113                       expression dots * string mcode (* ) *)
 114   | Assignment     of expression * Ast_cocci.assignOp mcode * expression *
 115                       bool (* true if it can match an initialization *)
 116   | CondExpr       of expression * string mcode (* ? *) * expression option *
 117                       string mcode (* : *) * expression
 118   | Postfix        of expression * Ast_cocci.fixOp mcode
 119   | Infix          of expression * Ast_cocci.fixOp mcode
 120   | Unary          of expression * Ast_cocci.unaryOp mcode
 121   | Binary         of expression * Ast_cocci.binaryOp mcode * expression
 122   | Nested         of expression * Ast_cocci.binaryOp mcode * expression
 123   | Paren          of string mcode (* ( *) * expression *
 124                       string mcode (* ) *)
 125   | ArrayAccess    of expression * string mcode (* [ *) * expression *
 126                       string mcode (* ] *)
 127   | RecordAccess   of expression * string mcode (* . *) * ident
 128   | RecordPtAccess of expression * string mcode (* -> *) * ident
 129   | Cast           of string mcode (* ( *) * typeC * string mcode (* ) *) *
 130                       expression
 131   | SizeOfExpr     of string mcode (* sizeof *) * expression
 132   | SizeOfType     of string mcode (* sizeof *) * string mcode (* ( *) *
 133                       typeC * string mcode (* ) *)
 134   | TypeExp        of typeC
 135   | MetaErr        of Ast_cocci.meta_name mcode * constraints * pure
 136   | MetaExpr       of Ast_cocci.meta_name mcode * constraints *
 137                       Type_cocci.typeC list option * Ast_cocci.form * pure
 138   | MetaExprList   of Ast_cocci.meta_name mcode (* only in arglists *) *
 139                       listlen * pure
 140   | EComma         of string mcode (* only in arglists *)
 141   | DisjExpr       of string mcode * expression list * string mcode list *
 142                       string mcode
 143   | NestExpr       of string mcode * expression dots * string mcode *
 144                       expression option * Ast_cocci.multi
 145   | Edots          of string mcode (* ... *) * expression option
 146   | Ecircles       of string mcode (* ooo *) * expression option
 147   | Estars         of string mcode (* *** *) * expression option
 148   | OptExp         of expression
 149   | UniqueExp      of expression
 150
 151 and expression = base_expression wrap
 152
 153 and constraints =
 154     NoConstraint
 155   | NotIdCstrt     of Ast_cocci.reconstraint
 156   | NotExpCstrt    of expression list
 157   | SubExpCstrt    of Ast_cocci.meta_name list
 158
 159 and listlen =
 160     MetaListLen of Ast_cocci.meta_name mcode
 161   | CstListLen of int
 162   | AnyListLen
 163
 164 (* --------------------------------------------------------------------- *)
 165 (* Types *)
 166
 167 and base_typeC =
 168     ConstVol        of Ast_cocci.const_vol mcode * typeC
 169   | BaseType        of Ast_cocci.baseType * string mcode list
 170   | Signed          of Ast_cocci.sign mcode * typeC option
 171   | Pointer         of typeC * string mcode (* * *)
 172   | FunctionPointer of typeC *
 173                   string mcode(* ( *)*string mcode(* * *)*string mcode(* ) *)*
 174                   string mcode (* ( *)*parameter_list*string mcode(* ) *)
 175   | FunctionType    of typeC option *
 176                        string mcode (* ( *) * parameter_list *
 177                        string mcode (* ) *)
 178   | Array           of typeC * string mcode (* [ *) *
 179                        expression option * string mcode (* ] *)
 180   | EnumName        of string mcode (*enum*) * ident option (* name *)
 181   | EnumDef  of typeC (* either StructUnionName or metavar *) *
 182         string mcode (* { *) * expression dots * string mcode (* } *)
 183   | StructUnionName of Ast_cocci.structUnion mcode * ident option (* name *)
 184   | StructUnionDef  of typeC (* either StructUnionName or metavar *) *
 185         string mcode (* { *) * declaration dots * string mcode (* } *)
 186   | TypeName        of string mcode
 187   | MetaType        of Ast_cocci.meta_name mcode * pure
 188   | DisjType        of string mcode * typeC list * (* only after iso *)
 189                        string mcode list (* the |s *)  * string mcode
 190   | OptType         of typeC
 191   | UniqueType      of typeC
 192
 193 and typeC = base_typeC wrap
 194
 195 (* --------------------------------------------------------------------- *)
 196 (* Variable declaration *)
 197 (* Even if the Cocci program specifies a list of declarations, they are
 198    split out into multiple declarations of a single variable each. *)
 199
 200 and base_declaration =
 201     MetaDecl   of Ast_cocci.meta_name mcode * pure (* variables *)
 202   | MetaField  of Ast_cocci.meta_name mcode * pure (* structure fields *)
 203   | MetaFieldList of Ast_cocci.meta_name mcode * listlen * pure
 204   | Init       of Ast_cocci.storage mcode option * typeC * ident *
 205         string mcode (*=*) * initialiser * string mcode (*;*)
 206   | UnInit     of Ast_cocci.storage mcode option * typeC * ident *
 207         string mcode (* ; *)
 208   | TyDecl of typeC * string mcode (* ; *)
 209   | MacroDecl of ident (* name *) * string mcode (* ( *) *
 210         expression dots * string mcode (* ) *) * string mcode (* ; *)
 211   | Typedef of string mcode (* typedef *) * typeC * typeC * string mcode (*;*)
 212   | DisjDecl   of string mcode * declaration list * string mcode list *
 213                   string mcode
 214   | Ddots      of string mcode (* ... *) * declaration option (* whencode *)
 215   | OptDecl    of declaration
 216   | UniqueDecl of declaration
 217
 218 and declaration = base_declaration wrap
 219
 220 (* --------------------------------------------------------------------- *)
 221 (* Initializers *)
 222
 223 and base_initialiser =
 224     MetaInit of Ast_cocci.meta_name mcode * pure
 225   | InitExpr of expression
 226   | InitList of string mcode (*{*) * initialiser_list * string mcode (*}*) *
 227         bool (* true if ordered, false if unordered *)
 228   | InitGccExt of
 229       designator list (* name *) * string mcode (*=*) *
 230         initialiser (* gccext: *)
 231   | InitGccName of ident (* name *) * string mcode (*:*) *
 232         initialiser
 233   | IComma of string mcode
 234   | Idots  of string mcode (* ... *) * initialiser option (* whencode *)
 235   | OptIni    of initialiser
 236   | UniqueIni of initialiser
 237
 238 and designator =
 239     DesignatorField of string mcode (* . *) * ident
 240   | DesignatorIndex of string mcode (* [ *) * expression * string mcode (* ] *)
 241   | DesignatorRange of
 242       string mcode (* [ *) * expression * string mcode (* ... *) *
 243       expression * string mcode (* ] *)
 244
 245 and initialiser = base_initialiser wrap
 246
 247 and initialiser_list = initialiser dots
 248
 249 (* --------------------------------------------------------------------- *)
 250 (* Parameter *)
 251
 252 and base_parameterTypeDef =
 253     VoidParam     of typeC
 254   | Param         of typeC * ident option
 255   | MetaParam     of Ast_cocci.meta_name mcode * pure
 256   | MetaParamList of Ast_cocci.meta_name mcode * listlen * pure
 257   | PComma        of string mcode
 258   | Pdots         of string mcode (* ... *)
 259   | Pcircles      of string mcode (* ooo *)
 260   | OptParam      of parameterTypeDef
 261   | UniqueParam   of parameterTypeDef
 262
 263 and parameterTypeDef = base_parameterTypeDef wrap
 264
 265 and parameter_list = parameterTypeDef dots
 266
 267 (* --------------------------------------------------------------------- *)
 268 (* #define Parameters *)
 269
 270 and base_define_param =
 271     DParam        of ident
 272   | DPComma       of string mcode
 273   | DPdots        of string mcode (* ... *)
 274   | DPcircles     of string mcode (* ooo *)
 275   | OptDParam     of define_param
 276   | UniqueDParam  of define_param
 277
 278 and define_param = base_define_param wrap
 279
 280 and base_define_parameters =
 281     NoParams
 282   | DParams      of string mcode(*( *) * define_param dots * string mcode(* )*)
 283
 284 and define_parameters = base_define_parameters wrap
 285
 286 (* --------------------------------------------------------------------- *)
 287 (* Statement*)
 288
 289 and base_statement =
 290     Decl          of (info * mcodekind) (* before the decl *) * declaration
 291   | Seq           of string mcode (* { *) * statement dots *
 292                      string mcode (* } *)
 293   | ExprStatement of expression * string mcode (*;*)
 294   | IfThen        of string mcode (* if *) * string mcode (* ( *) *
 295                      expression * string mcode (* ) *) *
 296                      statement * (info * mcodekind)
 297   | IfThenElse    of string mcode (* if *) * string mcode (* ( *) *
 298                      expression * string mcode (* ) *) *
 299                      statement * string mcode (* else *) * statement *
 300                      (info * mcodekind)
 301   | While         of string mcode (* while *) * string mcode (* ( *) *
 302                      expression * string mcode (* ) *) *
 303                      statement * (info * mcodekind) (* after info *)
 304   | Do            of string mcode (* do *) * statement *
 305                      string mcode (* while *) * string mcode (* ( *) *
 306                      expression * string mcode (* ) *) *
 307                      string mcode (* ; *)
 308   | For           of string mcode (* for *) * string mcode (* ( *) *
 309                      expression option * string mcode (*;*) *
 310                      expression option * string mcode (*;*) *
 311                      expression option * string mcode (* ) *) * statement *
 312                      (info * mcodekind) (* after info *)
 313   | Iterator      of ident (* name *) * string mcode (* ( *) *
 314                      expression dots * string mcode (* ) *) *
 315                      statement * (info * mcodekind) (* after info *)
 316   | Switch        of string mcode (* switch *) * string mcode (* ( *) *
 317                      expression * string mcode (* ) *) * string mcode (* { *) *
 318                      statement (*decl*) dots *
 319                      case_line dots * string mcode (* } *)
 320   | Break         of string mcode (* break *) * string mcode (* ; *)
 321   | Continue      of string mcode (* continue *) * string mcode (* ; *)
 322   | Label         of ident * string mcode (* : *)
 323   | Goto          of string mcode (* goto *) * ident * string mcode (* ; *)
 324   | Return        of string mcode (* return *) * string mcode (* ; *)
 325   | ReturnExpr    of string mcode (* return *) * expression *
 326                      string mcode (* ; *)
 327   | MetaStmt      of Ast_cocci.meta_name mcode * pure
 328   | MetaStmtList  of Ast_cocci.meta_name mcode (*only in statement lists*) *
 329                      pure
 330   | Exp           of expression  (* only in dotted statement lists *)
 331   | TopExp        of expression (* for macros body *)
 332   | Ty            of typeC (* only at top level *)
 333   | TopInit       of initialiser (* only at top level *)
 334   | Disj          of string mcode * statement dots list * string mcode list *
 335                      string mcode
 336   | Nest          of string mcode * statement dots * string mcode *
 337                      (statement dots,statement) whencode list * Ast_cocci.multi
 338   | Dots          of string mcode (* ... *) *
 339                      (statement dots,statement) whencode list
 340   | Circles       of string mcode (* ooo *) *
 341                      (statement dots,statement) whencode list
 342   | Stars         of string mcode (* *** *) *
 343                      (statement dots,statement) whencode list
 344   | FunDecl of (info * mcodekind) (* before the function decl *) *
 345         fninfo list * ident (* name *) *
 346         string mcode (* ( *) * parameter_list * string mcode (* ) *) *
 347         string mcode (* { *) * statement dots *
 348         string mcode (* } *)
 349   | Include of string mcode (* #include *) * Ast_cocci.inc_file mcode(* file *)
 350   | Undef of string mcode (* #define *) * ident (* name *)
 351   | Define of string mcode (* #define *) * ident (* name *) *
 352         define_parameters (*params*) * statement dots
 353   | OptStm   of statement
 354   | UniqueStm of statement
 355
 356 and fninfo =
 357     FStorage of Ast_cocci.storage mcode
 358   | FType of typeC
 359   | FInline of string mcode
 360   | FAttr of string mcode
 361
 362 and ('a,'b) whencode =
 363     WhenNot of 'a
 364   | WhenAlways of 'b
 365   | WhenModifier of Ast_cocci.when_modifier
 366   | WhenNotTrue of expression
 367   | WhenNotFalse of expression
 368
 369 and statement = base_statement wrap
 370
 371 and base_case_line =
 372     Default of string mcode (* default *) * string mcode (*:*) * statement dots
 373   | Case of string mcode (* case *) * expression * string mcode (*:*) *
 374         statement dots
 375   | DisjCase of string mcode * case_line list *
 376         string mcode list (* the |s *) * string mcode
 377   | OptCase of case_line
 378
 379 and case_line = base_case_line wrap
 380
 381 (* --------------------------------------------------------------------- *)
 382 (* Positions *)
 383
 384 and meta_pos =
 385     MetaPos of Ast_cocci.meta_name mcode * Ast_cocci.meta_name list *
 386         Ast_cocci.meta_collect
 387   | NoMetaPos
 388
 389 (* --------------------------------------------------------------------- *)
 390 (* Top-level code *)
 391
 392 and base_top_level =
 393     DECL of statement
 394   | CODE of statement dots
 395   | FILEINFO of string mcode (* old file *) * string mcode (* new file *)
 396   | ERRORWORDS of expression list
 397   | OTHER of statement (* temporary, disappears after top_level.ml *)
 398
 399 and top_level = base_top_level wrap
 400 and rule = top_level list
 401
 402 and parsed_rule =
 403     CocciRule of
 404       (rule * Ast_cocci.metavar list *
 405          (string list * string list * Ast_cocci.dependency * string *
 406             Ast_cocci.exists)) *
 407         (rule * Ast_cocci.metavar list) * Ast_cocci.ruletype
 408   | ScriptRule of string (* name *) *
 409       string * Ast_cocci.dependency *
 410         (Ast_cocci.script_meta_name *
 411            Ast_cocci.meta_name * Ast_cocci.metavar) list (*inherited vars*) *
 412         Ast_cocci.meta_name list (*script vars*) *
 413         string
 414   | InitialScriptRule of string (* name *) *
 415       string (*language*) * Ast_cocci.dependency * string (*code*)
 416   | FinalScriptRule of string (* name *) *
 417       string (*language*) * Ast_cocci.dependency * string (*code*)
 418
 419 (* --------------------------------------------------------------------- *)
 420
 421 and anything =
 422     DotsExprTag of expression dots
 423   | DotsInitTag of initialiser dots
 424   | DotsParamTag of parameterTypeDef dots
 425   | DotsStmtTag of statement dots
 426   | DotsDeclTag of declaration dots
 427   | DotsCaseTag of case_line dots
 428   | IdentTag of ident
 429   | ExprTag of expression
 430   | ArgExprTag of expression  (* for isos *)
 431   | TestExprTag of expression (* for isos *)
 432   | TypeCTag of typeC
 433   | ParamTag of parameterTypeDef
 434   | InitTag of initialiser
 435   | DeclTag of declaration
 436   | StmtTag of statement
 437   | CaseLineTag of case_line
 438   | TopTag of top_level
 439   | IsoWhenTag of Ast_cocci.when_modifier (*only for when code, in iso phase*)
 440   | IsoWhenTTag of expression(*only for when code, in iso phase*)
 441   | IsoWhenFTag of expression(*only for when code, in iso phase*)
 442   | MetaPosTag of meta_pos (* only in iso phase *)
 443
 444 val dotsExpr : expression dots -> anything
 445 val dotsInit : initialiser dots -> anything
 446 val dotsParam : parameterTypeDef dots -> anything
 447 val dotsStmt : statement dots -> anything
 448 val dotsDecl : declaration dots -> anything
 449 val dotsCase : case_line dots -> anything
 450 val ident : ident -> anything
 451 val expr : expression -> anything
 452 val typeC : typeC -> anything
 453 val param : parameterTypeDef -> anything
 454 val ini : initialiser -> anything
 455 val decl : declaration -> anything
 456 val stmt : statement -> anything
 457 val case_line : case_line -> anything
 458 val top : top_level -> anything
 459
 460 (* --------------------------------------------------------------------- *)
 461
 462 val undots : 'a dots -> 'a list
 463
 464 (* --------------------------------------------------------------------- *)
 465 (* Avoid cluttering the parser.  Calculated in compute_lines.ml. *)
 466
 467 val default_info : unit -> info
 468 val default_befaft : unit -> mcodekind
 469 val context_befaft : unit -> mcodekind
 470 val wrap : 'a -> 'a wrap
 471 val context_wrap : 'a -> 'a wrap
 472 val unwrap : 'a wrap -> 'a
 473 val unwrap_mcode : 'a mcode -> 'a
 474 val rewrap : 'a wrap -> 'b -> 'b wrap
 475 val rewrap_mcode : 'a mcode -> 'b -> 'b mcode
 476 val copywrap : 'a wrap -> 'b -> 'b wrap
 477 val get_pos : 'a mcode -> meta_pos
 478 val get_pos_ref : 'a mcode -> meta_pos ref
 479 val set_pos : meta_pos -> 'a mcode -> 'a mcode
 480 val get_info : 'a wrap -> info
 481 val set_info : 'a wrap -> info -> 'a wrap
 482 val get_index : 'a wrap -> int
 483 val set_index : 'a wrap -> int -> unit
 484 val get_line : 'a wrap -> int
 485 val get_line_end : 'a wrap -> int
 486 val get_mcodekind : 'a wrap -> mcodekind
 487 val get_mcode_mcodekind : 'a mcode -> mcodekind
 488 val get_mcodekind_ref : 'a wrap -> mcodekind ref
 489 val set_mcodekind : 'a wrap -> mcodekind -> unit
 490 val set_type : 'a wrap -> Type_cocci.typeC option -> unit
 491 val get_type : 'a wrap -> Type_cocci.typeC option
 492 val set_dots_bef_aft : statement -> dots_bef_aft -> statement
 493 val get_dots_bef_aft : 'a wrap -> dots_bef_aft
 494 val set_arg_exp : expression -> expression
 495 val get_arg_exp : expression -> bool
 496 val set_test_pos : expression -> expression
 497 val get_test_pos : 'a wrap -> bool
 498 val set_test_exp : expression -> expression
 499 val get_test_exp : 'a wrap -> bool
 500 val set_iso : 'a wrap -> (string*anything) list -> 'a wrap
 501 val get_iso : 'a wrap -> (string*anything) list
 502 val fresh_index : unit -> int
 503 val set_mcode_data : 'a -> 'a mcode -> 'a mcode
 504 val make_mcode : 'a -> 'a mcode
 505 val make_mcode_info : 'a -> info -> 'a mcode
 506 val make_minus_mcode : 'a -> 'a mcode
 507
 508 val ast0_type_to_type : typeC -> Type_cocci.typeC
 509 val reverse_type : Type_cocci.typeC -> base_typeC
 510 exception TyConv
 511
 512 val lub_pure : pure -> pure -> pure
 513
 514 (* --------------------------------------------------------------------- *)
 515
 516 val rule_name : string ref (* for the convenience of the parser *)