X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fcic_proof_checking%2FcicEnvironment.ml;h=0c5c9c01e9030259fff0591ca2a43260e347a84a;hb=1a685a8dd6747753020b8af3648441a6d7bdf36a;hp=9e57f19bc37d35a318e0e2f8d61ab4ae7daece11;hpb=ae326f646ef4c01b43d6da04201b427d1e175400;p=helm.git diff --git a/helm/ocaml/cic_proof_checking/cicEnvironment.ml b/helm/ocaml/cic_proof_checking/cicEnvironment.ml index 9e57f19bc..0c5c9c01e 100644 --- a/helm/ocaml/cic_proof_checking/cicEnvironment.ml +++ b/helm/ocaml/cic_proof_checking/cicEnvironment.ml @@ -35,66 +35,376 @@ (* *) (******************************************************************************) -let raise e = print_endline "***" ; flush stdout ; print_endline (Printexc.to_string e) ; flush stdout ; raise e;; +let cleanup_tmp = true;; + +let trust = ref (fun _ -> true);; +let set_trust f = trust := f +let trust_obj uri = !trust uri -(*CSC: forse i due seguenti tipi sono da unificare? *) -type cooked_obj = - Cooked of Cic.obj - | Frozen of Cic.obj - | Unchecked of Cic.obj type type_checked_obj = CheckedObj of Cic.obj (* cooked obj *) - | UncheckedObj of Cic.obj (* uncooked obj *) + | UncheckedObj of Cic.obj (* uncooked obj to proof-check *) ;; -exception NoFunctionProvided;; - -let cook_obj = ref (fun obj uri -> raise NoFunctionProvided);; - -let set_cooking_function foo = - cook_obj := foo -;; +exception AlreadyCooked of string;; exception CircularDependency of string;; +exception CouldNotFreeze of string;; exception CouldNotUnfreeze of string;; -exception Impossible;; -exception UncookedObj;; - -module HashedType = - struct - type t = UriManager.uri * int (* uri, livello di cottura *) - let equal (u1,n1) (u2,n2) = UriManager.eq u1 u2 && n1 = n2 - let hash = Hashtbl.hash - end +exception Term_not_found of UriManager.uri;; + +(* Cache that uses == instead of = for testing equality *) +(* Invariant: an object is always in at most one of the *) +(* following states: unchecked, frozen and cooked. *) +module Cache : + sig + val find_or_add_unchecked : + UriManager.uri -> get_object_to_add:(unit -> Cic.obj) -> Cic.obj + val unchecked_to_frozen : UriManager.uri -> unit + val frozen_to_cooked : + uri:UriManager.uri -> unit + val find_cooked : key:UriManager.uri -> Cic.obj + val add_cooked : key:UriManager.uri -> Cic.obj -> unit + val remove: UriManager.uri -> unit + + val dump_to_channel : ?callback:(string -> unit) -> out_channel -> unit + val restore_from_channel : ?callback:(string -> unit) -> in_channel -> unit + val empty : unit -> unit + end += + struct + module CacheOfCookedObjects : + sig + val mem : UriManager.uri -> bool + val find : UriManager.uri -> Cic.obj + val add : UriManager.uri -> Cic.obj -> unit + val remove : UriManager.uri -> unit + + (** (de)serialization of type checker cache *) + val dump_to_channel : ?callback:(string -> unit) -> out_channel -> unit + val restore_from_channel : ?callback:(string -> unit) -> in_channel -> unit + val empty : unit -> unit + end + = + struct + module HashedType = + struct + type t = UriManager.uri + let equal = UriManager.eq + let hash = Hashtbl.hash + end + ;; + module HT = Hashtbl.Make(HashedType);; + let hashtable = HT.create 1009;; + let mem uri = + try + HT.mem hashtable uri + with + Not_found -> false + ;; + let find uri = HT.find hashtable uri + ;; + let add uri obj = + HT.add hashtable uri obj + ;; + let remove uri = + if mem uri then + HT.remove hashtable uri + else + raise (Term_not_found uri); + ;; + + (* used to hash cons uris on restore to grant URI structure unicity *) + let restore_uris = + let module C = Cic in + let recons uri = + UriManager.uri_of_string (UriManager.string_of_uri uri) + in + let rec restore_in_term = + function + (C.Rel _) as t -> t + | C.Var (uri,exp_named_subst) -> + let uri' = recons uri in + let exp_named_subst' = + List.map + (function (uri,t) ->(recons uri,restore_in_term t)) exp_named_subst + in + C.Var (uri',exp_named_subst') + | C.Meta (i,l) -> + let l' = + List.map + (function + None -> None + | Some t -> Some (restore_in_term t) + ) l + in + C.Meta(i,l') + | C.Sort _ as t -> t + | C.Implicit _ as t -> t + | C.Cast (te,ty) -> C.Cast (restore_in_term te, restore_in_term ty) + | C.Prod (n,s,t) -> C.Prod (n, restore_in_term s, restore_in_term t) + | C.Lambda (n,s,t) -> C.Lambda (n, restore_in_term s, restore_in_term t) + | C.LetIn (n,s,t) -> C.LetIn (n, restore_in_term s, restore_in_term t) + | C.Appl l -> C.Appl (List.map restore_in_term l) + | C.Const (uri,exp_named_subst) -> + let uri' = recons uri in + let exp_named_subst' = + List.map + (function (uri,t) -> (recons uri,restore_in_term t)) exp_named_subst + in + C.Const (uri',exp_named_subst') + | C.MutInd (uri,tyno,exp_named_subst) -> + let uri' = recons uri in + let exp_named_subst' = + List.map + (function (uri,t) -> (recons uri,restore_in_term t)) exp_named_subst + in + C.MutInd (uri',tyno,exp_named_subst') + | C.MutConstruct (uri,tyno,consno,exp_named_subst) -> + let uri' = recons uri in + let exp_named_subst' = + List.map + (function (uri,t) -> (recons uri,restore_in_term t)) exp_named_subst + in + C.MutConstruct (uri',tyno,consno,exp_named_subst') + | C.MutCase (uri,i,outty,t,pl) -> + C.MutCase (recons uri, i, restore_in_term outty, restore_in_term t, + List.map restore_in_term pl) + | C.Fix (i, fl) -> + let len = List.length fl in + let liftedfl = + List.map + (fun (name, i, ty, bo) -> + (name, i, restore_in_term ty, restore_in_term bo)) + fl + in + C.Fix (i, liftedfl) + | C.CoFix (i, fl) -> + let len = List.length fl in + let liftedfl = + List.map + (fun (name, ty, bo) -> (name, restore_in_term ty, restore_in_term bo)) + fl + in + C.CoFix (i, liftedfl) + in + function + C.Constant (name,bo,ty,params) -> + let bo' = + match bo with + None -> None + | Some bo -> Some (restore_in_term bo) + in + let ty' = restore_in_term ty in + let params' = List.map recons params in + C.Constant (name, bo', ty', params') + | C.CurrentProof (name,conjs,bo,ty,params) -> + let conjs' = + List.map + (function (i,hyps,ty) -> + (i, + List.map (function + None -> None + | Some (name,C.Decl t) -> + Some (name,C.Decl (restore_in_term t)) + | Some (name,C.Def (bo,ty)) -> + let ty' = + match ty with + None -> None + | Some ty'' -> Some (restore_in_term ty'') + in + Some (name,C.Def (restore_in_term bo, ty'))) hyps, + restore_in_term ty)) + conjs + in + let bo' = restore_in_term bo in + let ty' = restore_in_term ty in + let params' = List.map recons params in + C.CurrentProof (name, conjs', bo', ty', params') + | C.Variable (name,bo,ty,params) -> + let bo' = + match bo with + None -> None + | Some bo -> Some (restore_in_term bo) + in + let ty' = restore_in_term ty in + let params' = List.map recons params in + C.Variable (name, bo', ty', params') + | C.InductiveDefinition (tl,params,paramsno) -> + let params' = List.map recons params in + let tl' = + List.map (function (name, inductive, ty, constructors) -> + name, + inductive, + restore_in_term ty, + (List.map + (function (name, ty) -> name, restore_in_term ty) + constructors)) + tl + in + C.InductiveDefinition (tl', params', paramsno) + + let dump_to_channel ?(callback = ignore) oc = + HT.iter (fun uri _ -> callback (UriManager.string_of_uri uri)) hashtable; + Marshal.to_channel oc hashtable [] ;; + let empty () = HT.clear hashtable ;; + let restore_from_channel ?(callback = ignore) ic = + let restored = Marshal.from_channel ic in + empty (); + HT.iter + (fun k v -> + callback (UriManager.string_of_uri k); + HT.add hashtable + (UriManager.uri_of_string (UriManager.string_of_uri k)) + (restore_uris v)) + restored + ;; + + end + ;; + let frozen_list = ref [];; + let unchecked_list = ref [];; + + let find_or_add_unchecked uri ~get_object_to_add = + try + List.assq uri !unchecked_list + with + Not_found -> + if List.mem_assq uri !frozen_list then + raise (CircularDependency (UriManager.string_of_uri uri)) + else + if CacheOfCookedObjects.mem uri then + raise (AlreadyCooked (UriManager.string_of_uri uri)) + else + (* OK, it is not already frozen nor cooked *) + let obj = get_object_to_add () in + unchecked_list := (uri,obj)::!unchecked_list ; + obj + ;; + let unchecked_to_frozen uri = + try + let obj = List.assq uri !unchecked_list in + unchecked_list := List.remove_assq uri !unchecked_list ; + frozen_list := (uri,obj)::!frozen_list + with + Not_found -> raise (CouldNotFreeze (UriManager.string_of_uri uri)) + ;; + let frozen_to_cooked ~uri = + try + let obj = List.assq uri !frozen_list in + frozen_list := List.remove_assq uri !frozen_list ; + CacheOfCookedObjects.add uri obj + with + Not_found -> raise (CouldNotUnfreeze (UriManager.string_of_uri uri)) + ;; + let find_cooked ~key:uri = CacheOfCookedObjects.find uri;; + let add_cooked ~key:uri obj = CacheOfCookedObjects.add uri obj;; + let remove uri = + if (!unchecked_list <> []) || (!frozen_list <> []) then + failwith "CicEnvironment.remove while type checking" + else + CacheOfCookedObjects.remove uri + ;; + let dump_to_channel = CacheOfCookedObjects.dump_to_channel;; + let restore_from_channel = CacheOfCookedObjects.restore_from_channel;; + let empty = CacheOfCookedObjects.empty;; + end ;; -(* Hashtable that uses == instead of = for testing equality *) -module HashTable = Hashtbl.Make(HashedType);; +let dump_to_channel = Cache.dump_to_channel;; +let restore_from_channel = Cache.restore_from_channel;; +let empty = Cache.empty;; + +let find_or_add_unchecked_to_cache uri = + Cache.find_or_add_unchecked uri + ~get_object_to_add: + (function () -> + let filename = Http_getter.getxml' uri in + let bodyfilename = + match UriManager.bodyuri_of_uri uri with + None -> None + | Some bodyuri -> + try + ignore (Http_getter.resolve' bodyuri) ; + (* The body exists ==> it is not an axiom *) + Some (Http_getter.getxml' bodyuri) + with + Http_getter_types.Key_not_found _ -> + (* The body does not exist ==> we consider it an axiom *) + None + in + let cleanup () = + if cleanup_tmp then + begin + if Sys.file_exists filename then Unix.unlink filename ; + match bodyfilename with + Some f -> if Sys.file_exists f then Unix.unlink f + | None -> () + end ; + in + CicUniv.directly_to_env_begin (); + let obj = + try + CicParser.obj_of_xml filename bodyfilename + with exn -> + cleanup (); + raise exn + in + CicUniv.directly_to_env_end (); + cleanup (); + obj + ) +;; -let hashtable = HashTable.create 271;; +(* set_type_checking_info uri *) +(* must be called once the type-checking of uri is finished *) +(* The object whose uri is uri is unfreezed *) +let set_type_checking_info uri = + Cache.frozen_to_cooked uri +;; -(* n is the number of time that the object must be cooked *) -let get_obj_and_type_checking_info uri n = +(* is_type_checked uri *) +(* CSC: commento falso ed obsoleto *) +(* returns a CheckedObj if the term has been type-checked *) +(* otherwise it freezes the term for type-checking and returns + it *) +(* set_type_checking_info must be called to unfreeze the term *) +let is_type_checked ?(trust=true) uri = try - HashTable.find hashtable (uri,n) + CheckedObj (Cache.find_cooked uri) with - Not_found -> - try - match HashTable.find hashtable (uri,0) with - Cooked _ - | Frozen _ -> raise Impossible - | Unchecked _ as t -> t - with - Not_found -> - let filename = Getter.getxml uri in - let obj = CicParser.obj_of_xml filename uri in - let output = Unchecked obj in - HashTable.add hashtable (uri,0) output ; - output + Not_found -> + let obj = find_or_add_unchecked_to_cache uri in + Cache.unchecked_to_frozen uri ; + if trust && trust_obj uri then + begin + CicLogger.log (`Trusting uri) ; + set_type_checking_info uri ; + CheckedObj (Cache.find_cooked uri) + end + else + UncheckedObj obj ;; -let is_annotation_uri uri = - Str.string_match (Str.regexp ".*\.ann$") (UriManager.string_of_uri uri) 0 +(* get_cooked_obj ~trust uri *) +(* returns the object if it is already type-checked or if it can be *) +(* trusted (if [trust] = true and the trusting function accepts it) *) +(* Otherwise it raises Not_found *) +let get_cooked_obj ?(trust=true) uri = + try + Cache.find_cooked uri + with Not_found -> + if trust && trust_obj uri then + begin + match is_type_checked uri with + CheckedObj obj -> obj + | _ -> assert false + end + else + begin + prerr_endline ("@@@ OOOOOOOPS: get_cooked_obj(" ^ UriManager.string_of_uri uri ^ ") raises Not_found since the object is not type-checked nor trusted.") ; + raise Not_found + end ;; (* get_obj uri *) @@ -102,62 +412,34 @@ let is_annotation_uri uri = (* then it is parsed via CicParser.term_of_xml from the file whose name is *) (* the result of Getter.getxml uri *) let get_obj uri = - match get_obj_and_type_checking_info uri 0 with - Unchecked obj -> obj - | Frozen obj -> obj - | Cooked obj -> obj -;; + try + get_cooked_obj uri + with + Not_found -> + find_or_add_unchecked_to_cache uri +;; -(*CSC Commento falso *) -(* get_obj uri *) -(* returns the cooked cic object whose uri is uri. The term must be present *) -(* and cooked in cache *) -let rec get_cooked_obj uri cookingsno = - match get_obj_and_type_checking_info uri cookingsno with - Unchecked _ - | Frozen _ -> raise UncookedObj - | Cooked obj -> obj +exception OnlyPutOfInductiveDefinitionsIsAllowed + +let put_inductive_definition uri obj = + match obj with + Cic.InductiveDefinition _ -> Cache.add_cooked uri obj + | _ -> raise OnlyPutOfInductiveDefinitionsIsAllowed ;; -(* is_type_checked uri *) -(* CSC: commento falso ed obsoleto *) -(* returns true if the term has been type-checked *) -(* otherwise it returns false and freeze the term for type-checking *) -(* set_type_checking_info must be called to unfreeze the term *) -let is_type_checked uri cookingsno = - match get_obj_and_type_checking_info uri cookingsno with - Cooked obj -> CheckedObj obj - | Unchecked obj -> - HashTable.remove hashtable (uri,0) ; - HashTable.add hashtable (uri,0) (Frozen obj) ; - UncheckedObj obj - | Frozen _ -> raise (CircularDependency (UriManager.string_of_uri uri)) +let in_cache uri = + try + ignore (Cache.find_cooked uri);true + with Not_found -> false ;; -(* set_type_checking_info uri *) -(* must be called once the type-checking of uri is finished *) -(* The object whose uri is uri is unfreezed *) -let set_type_checking_info uri = - match HashTable.find hashtable (uri,0) with - Frozen obj -> - (* let's cook the object at every level *) - HashTable.remove hashtable (uri,0) ; - let obj' = CicSubstitution.undebrujin_inductive_def uri obj in - HashTable.add hashtable (uri,0) (Cooked obj') ; - let cooked_objs = !cook_obj obj' uri in - let last_cooked_level = ref 0 in - let last_cooked_obj = ref obj' in - List.iter - (fun (n,cobj) -> - for i = !last_cooked_level + 1 to n do - HashTable.add hashtable (uri,i) (Cooked !last_cooked_obj) - done ; - HashTable.add hashtable (uri,n + 1) (Cooked cobj) ; - last_cooked_level := n + 1 ; - last_cooked_obj := cobj - ) cooked_objs ; - for i = !last_cooked_level + 1 to UriManager.depth_of_uri uri + 1 do - HashTable.add hashtable (uri,i) (Cooked !last_cooked_obj) - done - | _ -> raise (CouldNotUnfreeze (UriManager.string_of_uri uri)) +let add_type_checked_term uri obj = + match obj with + Cic.Constant (s,(Some bo),ty,ul) -> + Cache.add_cooked ~key:uri obj + | _ -> assert false + Cache.add_cooked ;; + +let remove_term = Cache.remove +