open InterpreterStatements open Interpreter module L = Logging module T = Types module A = LlbcAst module SA = SymbolicAst module Micro = PureMicroPasses open PureUtils open TranslateCore (** The local logger *) let log = TranslateCore.log (** The result of running the symbolic interpreter on a function: - the list of symbolic values used for the input values - the generated symbolic AST *) type symbolic_fun_translation = V.symbolic_value list * SA.expression (** Execute the symbolic interpreter on a function to generate a list of symbolic ASTs, for the forward function and the backward functions. *) let translate_function_to_symbolics (trans_ctx : trans_ctx) (fdef : A.fun_decl) : symbolic_fun_translation option = (* Debug *) log#ldebug (lazy ("translate_function_to_symbolics: " ^ Print.fun_name_to_string fdef.A.name)); let { type_context; fun_context; global_context } = trans_ctx in let fun_context = { C.fun_decls = fun_context.fun_decls } in match fdef.body with | None -> None | Some _ -> (* Evaluate *) let synthesize = true in let inputs, symb = evaluate_function_symbolic synthesize type_context fun_context global_context fdef in Some (inputs, Option.get symb) (** Translate a function, by generating its forward and backward translations. [fun_sigs]: maps the forward/backward functions to their signatures. In case of backward functions, we also provide names for the outputs. TODO: maybe we should introduce a record for this. *) let translate_function_to_pure (trans_ctx : trans_ctx) (fun_sigs : SymbolicToPure.fun_sig_named_outputs RegularFunIdNotLoopMap.t) (pure_type_decls : Pure.type_decl Pure.TypeDeclId.Map.t) (fdef : A.fun_decl) : pure_fun_translation_no_loops = (* Debug *) log#ldebug (lazy ("translate_function_to_pure: " ^ Print.fun_name_to_string fdef.A.name)); let { type_context; fun_context; global_context } = trans_ctx in let def_id = fdef.def_id in (* Compute the symbolic ASTs, if the function is transparent *) let symbolic_trans = translate_function_to_symbolics trans_ctx fdef in (* Convert the symbolic ASTs to pure ASTs: *) (* Initialize the context *) let forward_sig = RegularFunIdNotLoopMap.find (A.Regular def_id, None) fun_sigs in let sv_to_var = V.SymbolicValueId.Map.empty in let var_counter = Pure.VarId.generator_zero in let state_var, var_counter = Pure.VarId.fresh var_counter in let back_state_var, var_counter = Pure.VarId.fresh var_counter in let fuel0, var_counter = Pure.VarId.fresh var_counter in let fuel, var_counter = Pure.VarId.fresh var_counter in let calls = V.FunCallId.Map.empty in let abstractions = V.AbstractionId.Map.empty in let type_context = { SymbolicToPure.types_infos = type_context.type_infos; llbc_type_decls = type_context.type_decls; type_decls = pure_type_decls; } in let fun_context = { SymbolicToPure.llbc_fun_decls = fun_context.fun_decls; fun_sigs; fun_infos = fun_context.fun_infos; } in let global_context = { SymbolicToPure.llbc_global_decls = global_context.global_decls } in (* Compute the set of loops, and find better ids for them (starting at 0). Note that we only need to explore the forward function: the backward functions should contain the same set of loops. *) let loop_ids_map = match symbolic_trans with | None -> V.LoopId.Map.empty | Some (_, ast) -> let m = ref V.LoopId.Map.empty in let _, fresh_loop_id = Pure.LoopId.fresh_stateful_generator () in let visitor = object inherit [_] SA.iter_expression as super method! visit_loop env loop = let _ = match V.LoopId.Map.find_opt loop.loop_id !m with | Some _ -> () | None -> m := V.LoopId.Map.add loop.loop_id (fresh_loop_id ()) !m in super#visit_loop env loop end in visitor#visit_expression () ast; !m in let ctx = { SymbolicToPure.bid = None; (* Dummy for now *) sg = forward_sig.sg; fwd_sg = forward_sig.sg; (* Will need to be updated for the backward functions *) sv_to_var; var_counter; state_var; back_state_var; fuel0; fuel; type_context; fun_context; global_context; fun_decl = fdef; forward_inputs = []; (* Empty for now *) backward_inputs = T.RegionGroupId.Map.empty; (* Empty for now *) backward_outputs = T.RegionGroupId.Map.empty; loop_backward_outputs = None; (* Empty for now *) calls; abstractions; loop_id = None; inside_loop = false; loop_ids_map; loops = Pure.LoopId.Map.empty; } in (* Add the forward inputs (the initialized input variables for the forward function) *) let ctx = match (fdef.body, symbolic_trans) with | None, None -> ctx | Some body, Some (input_svs, _) -> let forward_input_vars = LlbcAstUtils.fun_body_get_input_vars body in let forward_input_varnames = List.map (fun (v : A.var) -> v.name) forward_input_vars in let input_svs = List.combine forward_input_varnames input_svs in let ctx, forward_inputs = SymbolicToPure.fresh_named_vars_for_symbolic_values input_svs ctx in { ctx with forward_inputs } | _ -> raise (Failure "Unreachable") in (* Translate the forward function *) let pure_forward = match symbolic_trans with | None -> SymbolicToPure.translate_fun_decl ctx None | Some (_, ast) -> SymbolicToPure.translate_fun_decl ctx (Some ast) in (* Translate the backward functions *) let translate_backward (rg : T.region_var_group) : Pure.fun_decl = (* For the backward inputs/outputs initialization: we use the fact that * there are no nested borrows for now, and so that the region groups * can't have parents *) assert (rg.parents = []); let back_id = rg.id in match symbolic_trans with | None -> (* Initialize the context - note that the ret_ty is not really * useful as we don't translate a body *) let backward_sg = RegularFunIdNotLoopMap.find (A.Regular def_id, Some back_id) fun_sigs in let ctx = { ctx with bid = Some back_id; sg = backward_sg.sg } in (* Translate *) SymbolicToPure.translate_fun_decl ctx None | Some (_, symbolic) -> (* Finish initializing the context by adding the additional input variables required by the backward function. *) let backward_sg = RegularFunIdNotLoopMap.find (A.Regular def_id, Some back_id) fun_sigs in (* We need to ignore the forward inputs, and the state input (if there is) *) let backward_inputs = let sg = backward_sg.sg in (* We need to ignore the forward state and the backward state *) let num_forward_inputs = sg.info.num_fwd_inputs_with_fuel_with_state in let num_back_inputs = Option.get sg.info.num_back_inputs_no_state in Collections.List.subslice sg.inputs num_forward_inputs (num_forward_inputs + num_back_inputs) in (* As we forbid nested borrows, the additional inputs for the backward * functions come from the borrows in the return value of the rust function: * we thus use the name "ret" for those inputs *) let backward_inputs = List.map (fun ty -> (Some "ret", ty)) backward_inputs in let ctx, backward_inputs = SymbolicToPure.fresh_vars backward_inputs ctx in (* The outputs for the backward functions, however, come from borrows * present in the input values of the rust function: for those we reuse * the names of the input values. *) let backward_outputs = List.combine backward_sg.output_names backward_sg.sg.doutputs in let ctx, backward_outputs = SymbolicToPure.fresh_vars backward_outputs ctx in let backward_inputs = T.RegionGroupId.Map.singleton back_id backward_inputs in let backward_outputs = T.RegionGroupId.Map.singleton back_id backward_outputs in (* Put everything in the context *) let ctx = { ctx with bid = Some back_id; sg = backward_sg.sg; backward_inputs; backward_outputs; } in (* Translate *) SymbolicToPure.translate_fun_decl ctx (Some symbolic) in let pure_backwards = List.map translate_backward fdef.signature.regions_hierarchy in (* Return *) (pure_forward, pure_backwards) let translate_module_to_pure (crate : A.crate) : trans_ctx * Pure.type_decl list * (bool * pure_fun_translation) list = (* Debug *) log#ldebug (lazy "translate_module_to_pure"); (* Compute the type and function contexts *) let type_context, fun_context, global_context = compute_type_fun_global_contexts crate in let fun_infos = FA.analyze_module crate fun_context.C.fun_decls global_context.C.global_decls !Config.use_state in let fun_context = { fun_decls = fun_context.fun_decls; fun_infos } in let trans_ctx = { type_context; fun_context; global_context } in (* Translate all the type definitions *) let type_decls = SymbolicToPure.translate_type_decls crate.types in (* Compute the type definition map *) let type_decls_map = Pure.TypeDeclId.Map.of_list (List.map (fun (def : Pure.type_decl) -> (def.def_id, def)) type_decls) in (* Translate all the function *signatures* *) let assumed_sigs = List.map (fun (id, sg, _, _) -> (A.Assumed id, List.map (fun _ -> None) (sg : A.fun_sig).inputs, sg)) Assumed.assumed_infos in let local_sigs = List.map (fun (fdef : A.fun_decl) -> let input_names = match fdef.body with | None -> List.map (fun _ -> None) fdef.signature.inputs | Some body -> List.map (fun (v : A.var) -> v.name) (LlbcAstUtils.fun_body_get_input_vars body) in (A.Regular fdef.def_id, input_names, fdef.signature)) crate.functions in let sigs = List.append assumed_sigs local_sigs in let fun_sigs = SymbolicToPure.translate_fun_signatures fun_context.fun_infos type_context.type_infos sigs in (* Translate all the *transparent* functions *) let pure_translations = List.map (translate_function_to_pure trans_ctx fun_sigs type_decls_map) crate.functions in (* Apply the micro-passes *) let pure_translations = Micro.apply_passes_to_pure_fun_translations trans_ctx pure_translations in (* Return *) (trans_ctx, type_decls, pure_translations) (** Extraction context *) type gen_ctx = { crate : A.crate; extract_ctx : ExtractBase.extraction_ctx; trans_types : Pure.type_decl Pure.TypeDeclId.Map.t; trans_funs : (bool * pure_fun_translation) A.FunDeclId.Map.t; functions_with_decreases_clause : PureUtils.FunLoopIdSet.t; } type gen_config = { extract_types : bool; extract_decreases_clauses : bool; extract_template_decreases_clauses : bool; extract_fun_decls : bool; extract_transparent : bool; (** If [true], extract the transparent declarations, otherwise ignore. *) extract_opaque : bool; (** If [true], extract the opaque declarations, otherwise ignore. *) extract_state_type : bool; (** If [true], generate a definition/declaration for the state type *) extract_globals : bool; (** If [true], generate a definition/declaration for top-level (global) declarations *) interface : bool; (** [true] if we generate an interface file, [false] otherwise. For now, this only impacts whether we use [val] or [assume val] for the opaque definitions. In the future, we might want to extract all the declarations in an interface file, together with an implementation file if needed. *) test_trans_unit_functions : bool; } (** Returns the pair: (has opaque type decls, has opaque fun decls) *) let module_has_opaque_decls (ctx : gen_ctx) : bool * bool = let has_opaque_types = Pure.TypeDeclId.Map.exists (fun _ (d : Pure.type_decl) -> match d.kind with Opaque -> true | _ -> false) ctx.trans_types in let has_opaque_funs = A.FunDeclId.Map.exists (fun _ ((_, ((t_fwd, _), _)) : bool * pure_fun_translation) -> Option.is_none t_fwd.body) ctx.trans_funs in (has_opaque_types, has_opaque_funs) (** Export a type declaration. It may happen that we have to extract extra information/instructions. For instance, we might need to define some projector notations. This is why we have the two booleans [extract_decl] and [extract_extra_info]. If [extract_decl] is [true], then we extract the type declaration. If [extract_extra_info] is [true], we extract this extra information (after the declaration, if both booleans are [true]). *) let export_type (fmt : Format.formatter) (config : gen_config) (ctx : gen_ctx) (kind : ExtractBase.decl_kind) (id : Pure.TypeDeclId.id) (extract_decl : bool) (extract_extra_info : bool) : unit = (* Retrieve the declaration *) let def = Pure.TypeDeclId.Map.find id ctx.trans_types in (* Update the kind, if the type is opaque *) let is_opaque, kind = match def.kind with | Enum _ | Struct _ -> (false, kind) | Opaque -> let kind = if config.interface then ExtractBase.Declared else ExtractBase.Assumed in (true, kind) in (* Extract, if the config instructs to do so (depending on whether the type * is opaque or not) *) if (is_opaque && config.extract_opaque) || ((not is_opaque) && config.extract_transparent) then ( if extract_decl then Extract.extract_type_decl ctx.extract_ctx fmt kind def; if extract_extra_info then Extract.extract_type_decl_extra_info ctx.extract_ctx fmt kind def) (** Export a group of types. [is_rec]: [true] if the types are recursive. Necessarily [true] if there is > 1 type to extract. *) let export_types_group (fmt : Format.formatter) (config : gen_config) (ctx : gen_ctx) (is_rec : bool) (ids : Pure.TypeDeclId.id list) : unit = let export_type = export_type fmt config ctx in let export_type_decl kind id = export_type kind id true false in let export_type_extra_info kind id = export_type kind id false true in (* Rem.: we shouldn't have (mutually) recursive opaque types *) let num_decls = List.length ids in let is_mut_rec = num_decls > 1 in let kind_from_index i = if not is_mut_rec then if is_rec then ExtractBase.SingleRec else ExtractBase.SingleNonRec else if i = 0 then ExtractBase.MutRecFirst else if i = num_decls - 1 then ExtractBase.MutRecLast else ExtractBase.MutRecInner in (* Extract the type declarations *) List.iteri (fun i id -> let kind = kind_from_index i in export_type_decl kind id) ids; (* Export the extra information (ex.: [Arguments] instructions in Coq) *) List.iteri (fun i id -> let kind = kind_from_index i in export_type_extra_info kind id) ids (** Export a global declaration. TODO: check correct behaviour with opaque globals. *) let export_global (fmt : Format.formatter) (config : gen_config) (ctx : gen_ctx) (id : A.GlobalDeclId.id) : unit = let global_decls = ctx.extract_ctx.trans_ctx.global_context.global_decls in let global = A.GlobalDeclId.Map.find id global_decls in let _, ((body, loop_fwds), body_backs) = A.FunDeclId.Map.find global.body_id ctx.trans_funs in assert (body_backs = []); assert (loop_fwds = []); let is_opaque = Option.is_none body.Pure.body in if config.extract_globals && ( ((not is_opaque) && config.extract_transparent) || (is_opaque && config.extract_opaque) ) then Extract.extract_global_decl ctx.extract_ctx fmt global body config.interface (** Utility. Export a group of functions, used by {!export_functions_group}. We need this because for every function in Rust we may generate several functions in the translation (a forward function, several backward functions, loop functions, etc.). Those functions might call each other in different ways. In particular, they may be mutually recursive, in which case we might be able to group them into several groups of mutually recursive definitions, etc. For this reason, {!export_functions_group} computes the dependency graph of the functions as well as their strongly connected components, and gives each SCC at a time to {!export_functions_group_scc}. Rem.: this function only extracts the function *declarations*. It doesn't extract the decrease clauses, nor does it extract the unit tests. Rem.: this function doesn't check [config.extract_fun_decls]: it should have been checked by the caller. *) let export_functions_group_scc (fmt : Format.formatter) (config : gen_config) (ctx : gen_ctx) (is_rec : bool) (decls : Pure.fun_decl list) : unit = (* Utility to check a function has a decrease clause *) let has_decreases_clause (def : Pure.fun_decl) : bool = PureUtils.FunLoopIdSet.mem (def.def_id, def.loop_id) ctx.functions_with_decreases_clause in (* Extract the function declarations *) (* Check if the functions are mutually recursive *) let is_mut_rec = List.length decls > 1 in assert ((not is_mut_rec) || is_rec); let decls_length = List.length decls in List.iteri (fun i def -> let is_opaque = Option.is_none def.Pure.body in let kind = if is_opaque then if config.interface then ExtractBase.Declared else ExtractBase.Assumed else if not is_rec then ExtractBase.SingleNonRec else if is_mut_rec then (* If the functions are mutually recursive, we need to distinguish: * - the first of the group * - the last of the group * - the inner functions *) if i = 0 then ExtractBase.MutRecFirst else if i = decls_length - 1 then ExtractBase.MutRecLast else ExtractBase.MutRecInner else ExtractBase.SingleRec in let has_decr_clause = has_decreases_clause def && config.extract_decreases_clauses in (* Check if the definition needs to be filtered or not *) if ((not is_opaque) && config.extract_transparent) || (is_opaque && config.extract_opaque) then Extract.extract_fun_decl ctx.extract_ctx fmt kind has_decr_clause def) decls (** Export a group of function declarations. In case of (non-mutually) recursive functions, we use a simple procedure to check if the forward and backward functions are mutually recursive. *) let export_functions_group (fmt : Format.formatter) (config : gen_config) (ctx : gen_ctx) (pure_ls : (bool * pure_fun_translation) list) : unit = (* Utility to check a function has a decrease clause *) let has_decreases_clause (def : Pure.fun_decl) : bool = PureUtils.FunLoopIdSet.mem (def.def_id, def.loop_id) ctx.functions_with_decreases_clause in (* Extract the decrease clauses template bodies *) if config.extract_template_decreases_clauses then List.iter (fun (_, ((fwd, loop_fwds), _)) -> (* We only generate decreases clauses for the forward functions, because the termination argument should only depend on the forward inputs. The backward functions thus use the same decreases clauses as the forward function. Rem.: we might filter backward functions in {!PureMicroPasses}, but we don't remove forward functions. Instead, we remember if we should filter those functions at extraction time with a boolean (see the type of the [pure_ls] input parameter). *) let extract_decrease decl = let has_decr_clause = has_decreases_clause decl in if has_decr_clause then if !Config.backend = Lean then Extract.extract_termination_and_decreasing ctx.extract_ctx fmt decl else Extract.extract_template_decreases_clause ctx.extract_ctx fmt decl in extract_decrease fwd; List.iter extract_decrease loop_fwds) pure_ls; (* Concatenate the function definitions, filtering the useless forward * functions. *) let decls = List.concat (List.map (fun (keep_fwd, ((fwd, fwd_loops), (back_ls : fun_and_loops list))) -> let fwd = if keep_fwd then List.append fwd_loops [ fwd ] else [] in let back : Pure.fun_decl list = List.concat (List.map (fun (back, loop_backs) -> List.append loop_backs [ back ]) back_ls) in List.append fwd back) pure_ls) in (* Extract the function definitions *) (if config.extract_fun_decls then (* Group the mutually recursive definitions *) let subgroups = ReorderDecls.group_reorder_fun_decls decls in (* Extract the subgroups *) let export_subgroup (is_rec : bool) (decls : Pure.fun_decl list) : unit = export_functions_group_scc fmt config ctx is_rec decls in List.iter (fun (is_rec, decls) -> export_subgroup is_rec decls) subgroups); (* Insert unit tests if necessary *) if config.test_trans_unit_functions then List.iter (fun (keep_fwd, ((fwd, _), _)) -> if keep_fwd then Extract.extract_unit_test_if_unit_fun ctx.extract_ctx fmt fwd) pure_ls (** A generic utility to generate the extracted definitions: as we may want to split the definitions between different files (or not), we can control what is precisely extracted. *) let extract_definitions (fmt : Format.formatter) (config : gen_config) (ctx : gen_ctx) : unit = (* Export the definition groups to the file, in the proper order. - [extract_decl]: extract the type declaration (if not filtered) - [extract_extra_info]: extra the extra type information (e.g., the [Arguments] information in Coq). *) let export_functions_group = export_functions_group fmt config ctx in let export_global = export_global fmt config ctx in let export_types_group = export_types_group fmt config ctx in let export_state_type () : unit = let kind = if config.interface then ExtractBase.Declared else ExtractBase.Assumed in Extract.extract_state_type fmt ctx.extract_ctx kind in let export_decl_group (dg : A.declaration_group) : unit = match dg with | Type (NonRec id) -> if config.extract_types then export_types_group false [ id ] | Type (Rec ids) -> if config.extract_types then export_types_group true ids | Fun (NonRec id) -> (* Lookup *) let pure_fun = A.FunDeclId.Map.find id ctx.trans_funs in (* Translate *) export_functions_group [ pure_fun ] | Fun (Rec ids) -> (* General case of mutually recursive functions *) (* Lookup *) let pure_funs = List.map (fun id -> A.FunDeclId.Map.find id ctx.trans_funs) ids in (* Translate *) export_functions_group pure_funs | Global id -> export_global id in (* If we need to export the state type: we try to export it after we defined * the type definitions, because if the user wants to define a model for the * type, he might want to reuse those in the state type. * More specifically: if we extract functions in the same file as the type, * we have no choice but to define the state type before the functions, * because they may reuse this state type: in this case, we define/declare * it at the very beginning. Otherwise, we define/declare it at the very end. *) if config.extract_state_type && config.extract_fun_decls then export_state_type (); if config.extract_opaque && config.extract_fun_decls && !Config.backend = Lean then begin Format.pp_print_break fmt 0 0; Format.pp_open_vbox fmt ctx.extract_ctx.indent_incr; Format.pp_print_string fmt "structure OpaqueDefs where"; Format.pp_print_break fmt 0 0 end; List.iter export_decl_group ctx.crate.declarations; if config.extract_opaque && !Config.backend = Lean then begin Format.pp_close_box fmt () end; if config.extract_state_type && not config.extract_fun_decls then export_state_type () let extract_file (config : gen_config) (ctx : gen_ctx) (filename : string) (rust_module_name : string) (module_name : string) (custom_msg : string) ?(custom_variables: string list = []) (custom_imports : string list) (custom_includes : string list) : unit = (* Open the file and create the formatter *) let out = open_out filename in let fmt = Format.formatter_of_out_channel out in (* Print the headers. * Note that we don't use the OCaml formatter for purpose: we want to control * line insertion (we have to make sure that some instructions like [open MODULE] * are printed on one line!). * This is ok as long as we end up with a line break, so that the formatter's * internal count is consistent with the state of the file. *) (* Create the header *) begin match !Config.backend with | Lean -> Printf.fprintf out "-- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS\n"; Printf.fprintf out "-- [%s]%s\n" rust_module_name custom_msg; | Coq | FStar -> Printf.fprintf out "(** THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS *)\n"; Printf.fprintf out "(** [%s]%s *)\n" rust_module_name custom_msg end; (match !Config.backend with | FStar -> Printf.fprintf out "module %s\n" module_name; Printf.fprintf out "open Primitives\n"; (* Add the custom imports *) List.iter (fun m -> Printf.fprintf out "open %s\n" m) custom_imports; (* Add the custom includes *) List.iter (fun m -> Printf.fprintf out "include %s\n" m) custom_includes; (* Z3 options - note that we use fuel 1 because it its useful for the decrease clauses *) Printf.fprintf out "\n#set-options \"--z3rlimit 50 --fuel 1 --ifuel 1\"\n" | Coq -> Printf.fprintf out "Require Import Primitives.\n"; Printf.fprintf out "Import Primitives.\n"; Printf.fprintf out "Require Import Coq.ZArith.ZArith.\n"; Printf.fprintf out "Local Open Scope Primitives_scope.\n"; (* Add the custom imports *) List.iter (fun m -> Printf.fprintf out "Require Import %s.\n" m) custom_imports; (* Add the custom includes *) List.iter (fun m -> Printf.fprintf out "Require Export %s.\n" m; Printf.fprintf out "Import %s.\n" m) custom_includes; Printf.fprintf out "Module %s.\n" module_name | Lean -> Printf.fprintf out "import Base.Primitives\n"; (* Add the custom imports *) List.iter (fun m -> Printf.fprintf out "import %s\n" m) custom_imports; (* Add the custom includes *) List.iter (fun m -> Printf.fprintf out "import %s\n" m) custom_includes; if custom_variables <> [] then begin Printf.fprintf out "\n"; List.iter (fun m -> Printf.fprintf out "%s\n" m) custom_variables end ); (* From now onwards, we use the formatter *) (* Set the margin *) Format.pp_set_margin fmt 80; (* Create a vertical box *) Format.pp_open_vbox fmt 0; (* Extract the definitions *) extract_definitions fmt config ctx; (* Close the box and end the formatting *) Format.pp_close_box fmt (); Format.pp_print_newline fmt (); (* Close the module *) (match !Config.backend with | FStar | Lean -> () | Coq -> Printf.fprintf out "End %s .\n" module_name); (* Some logging *) log#linfo (lazy ("Generated: " ^ filename)); (* Flush and close the file *) close_out out (** Translate a module and write the synthesized code to an output file. TODO: rename to translate_crate *) let translate_module (filename : string) (dest_dir : string) (crate : A.crate) : unit = (* Translate the module to the pure AST *) let trans_ctx, trans_types, trans_funs = translate_module_to_pure crate in (* Initialize the extraction context - for now we extract only to F*. * We initialize the names map by registering the keywords used in the * language, as well as some primitive names ("u32", etc.) *) let variant_concatenate_type_name = true in let mk_formatter_and_names_map = Extract.mk_formatter_and_names_map in let fmt, names_map = mk_formatter_and_names_map trans_ctx crate.name variant_concatenate_type_name in let ctx = { ExtractBase.trans_ctx; names_map; fmt; indent_incr = 2 } in (* We need to compute which functions are recursive, in order to know * whether we should generate a decrease clause or not. *) let rec_functions = List.map (fun (_, ((fwd, loop_fwds), _)) -> let fwd = if fwd.Pure.signature.info.effect_info.is_rec then [ (fwd.def_id, None) ] else [] in let loop_fwds = List.map (fun (def : Pure.fun_decl) -> [ (def.def_id, def.loop_id) ]) loop_fwds in fwd :: loop_fwds) trans_funs in let rec_functions : PureUtils.fun_loop_id list = List.concat (List.concat rec_functions) in let rec_functions = PureUtils.FunLoopIdSet.of_list rec_functions in (* Register unique names for all the top-level types, globals and functions. * Note that the order in which we generate the names doesn't matter: * we just need to generate a mapping from identifier to name, and make * sure there are no name clashes. *) let ctx = List.fold_left (fun ctx def -> Extract.extract_type_decl_register_names ctx def) ctx trans_types in let ctx = List.fold_left (fun ctx (keep_fwd, defs) -> (* We generate a decrease clause for all the recursive functions *) let fwd_def = fst (fst defs) in let gen_decr_clause (def : Pure.fun_decl) = PureUtils.FunLoopIdSet.mem (def.Pure.def_id, def.Pure.loop_id) rec_functions in (* Register the names, only if the function is not a global body - * those are handled later *) let is_global = fwd_def.Pure.is_global_decl_body in if is_global then ctx else Extract.extract_fun_decl_register_names ctx keep_fwd gen_decr_clause defs) ctx trans_funs in let ctx = List.fold_left Extract.extract_global_decl_register_names ctx crate.globals in (* Open the output file *) (* First compute the filename by replacing the extension and converting the * case (rust module names are snake case) *) let module_name, extract_filebasename = match Filename.chop_suffix_opt ~suffix:".llbc" filename with | None -> (* Note that we already checked the suffix upon opening the file *) raise (Failure "Unreachable") | Some filename -> (* Retrieve the file basename *) let basename = Filename.basename filename in (* Convert the case *) let module_name = StringUtils.to_camel_case basename in (* Concatenate *) (module_name, Filename.concat dest_dir module_name) in (* Put the translated definitions in maps *) let trans_types = Pure.TypeDeclId.Map.of_list (List.map (fun (d : Pure.type_decl) -> (d.def_id, d)) trans_types) in let trans_funs = A.FunDeclId.Map.of_list (List.map (fun ((keep_fwd, (fd, bdl)) : bool * pure_fun_translation) -> ((fst fd).def_id, (keep_fwd, (fd, bdl)))) trans_funs) in let mkdir_if dest_dir = if not (Sys.file_exists dest_dir) then ( log#linfo (lazy ("Creating missing directory: " ^ dest_dir)); (* Create a directory with *default* permissions *) Core_unix.mkdir_p dest_dir) in (* Create the directory, if necessary *) mkdir_if dest_dir; let needs_clauses_module = !Config.extract_decreases_clauses && not (PureUtils.FunLoopIdSet.is_empty rec_functions) in (* Lean reflects the module hierarchy within the filesystem, so we need to create more directories *) if !Config.backend = Lean then begin let (^^) = Filename.concat in mkdir_if (dest_dir ^^ "Base"); mkdir_if (dest_dir ^^ module_name); if needs_clauses_module then mkdir_if (dest_dir ^^ module_name ^^ "Clauses"); end; (* Copy the "Primitives" file *) let _ = (* Retrieve the executable's directory *) let exe_dir = Filename.dirname Sys.argv.(0) in let primitives_src, primitives_destname = match !Config.backend with | Config.FStar -> ("/backends/fstar/Primitives.fst", "Primitives.fst") | Config.Coq -> ("/backends/coq/Primitives.v", "Primitives.v") | Config.Lean -> ("/backends/lean/Primitives.lean", "Base/Primitives.lean") in let src = open_in (exe_dir ^ primitives_src) in let tgt_filename = Filename.concat dest_dir primitives_destname in let tgt = open_out tgt_filename in (* Very annoying: I couldn't find a "cp" function in the OCaml libraries... *) try while true do (* We copy line by line *) let line = input_line src in Printf.fprintf tgt "%s\n" line done with End_of_file -> close_in src; close_out tgt; log#linfo (lazy ("Copied: " ^ tgt_filename)) in (* Extract the file(s) *) let gen_ctx = { crate; extract_ctx = ctx; trans_types; trans_funs; functions_with_decreases_clause = rec_functions; } in let module_delimiter = match !Config.backend with FStar -> "." | Coq -> "_" | Lean -> "." in let file_delimiter = if !Config.backend = Lean then "/" else module_delimiter in let ext = match !Config.backend with FStar -> ".fst" | Coq -> ".v" | Lean -> ".lean" in (* Extract one or several files, depending on the configuration *) if !Config.split_files then ( let base_gen_config = { extract_types = false; extract_decreases_clauses = !Config.extract_decreases_clauses; extract_template_decreases_clauses = false; extract_fun_decls = false; extract_transparent = true; extract_opaque = false; extract_state_type = false; extract_globals = false; interface = false; test_trans_unit_functions = false; } in (* Check if there are opaque types and functions - in which case we need * to split *) let has_opaque_types, has_opaque_funs = module_has_opaque_decls gen_ctx in let has_opaque_types = has_opaque_types || !Config.use_state in (* Extract the types *) (* If there are opaque types, we extract in an interface *) let types_filename_ext = match !Config.backend with | FStar -> if has_opaque_types then ".fsti" else ".fst" | Coq -> ".v" | Lean -> ".lean" in let types_filename = extract_filebasename ^ file_delimiter ^ "Types" ^ types_filename_ext in let types_module = module_name ^ module_delimiter ^ "Types" in let types_config = { base_gen_config with extract_types = true; extract_opaque = true; extract_state_type = !Config.use_state; interface = has_opaque_types; } in extract_file types_config gen_ctx types_filename crate.A.name types_module ": type definitions" [] []; (* Extract the template clauses *) if needs_clauses_module && !Config.extract_template_decreases_clauses then ( let clauses_filename = extract_filebasename ^ file_delimiter ^ "Clauses" ^ file_delimiter ^ "Template" ^ ext in let clauses_module = module_name ^ module_delimiter ^ "Clauses" ^ module_delimiter ^ "Template" in let clauses_config = { base_gen_config with extract_template_decreases_clauses = true } in extract_file clauses_config gen_ctx clauses_filename crate.A.name clauses_module ": templates for the decreases clauses" [ types_module ] []); (* Extract the opaque functions, if needed *) let opaque_funs_module = if has_opaque_funs then ( let opaque_filename = extract_filebasename ^ file_delimiter ^ "Opaque" ^ ext in let opaque_module = module_name ^ module_delimiter ^ "Opaque" in let opaque_config = { base_gen_config with extract_fun_decls = true; extract_transparent = false; extract_opaque = true; interface = true; } in extract_file opaque_config gen_ctx opaque_filename crate.A.name opaque_module ": opaque function definitions" [] [ types_module ]; [ opaque_module ]) else [] in (* Extract the functions *) let fun_filename = extract_filebasename ^ file_delimiter ^ "Funs" ^ ext in let fun_module = module_name ^ module_delimiter ^ "Funs" in let fun_config = { base_gen_config with extract_fun_decls = true; extract_globals = true; test_trans_unit_functions = !Config.test_trans_unit_functions; } in let clauses_module = if needs_clauses_module then [ module_name ^ module_delimiter ^ "Clauses" ^ module_delimiter ^ "Template"] else [] in let custom_variables = if has_opaque_funs then [ "section variable (opaque_defs: OpaqueDefs)" ] else [] in extract_file fun_config gen_ctx fun_filename crate.A.name fun_module ": function definitions" [] ~custom_variables ([ types_module ] @ opaque_funs_module @ clauses_module)) else let gen_config = { extract_types = true; extract_decreases_clauses = !Config.extract_decreases_clauses; extract_template_decreases_clauses = !Config.extract_template_decreases_clauses; extract_fun_decls = true; extract_transparent = true; extract_opaque = true; extract_state_type = !Config.use_state; extract_globals = true; interface = false; test_trans_unit_functions = !Config.test_trans_unit_functions; } in (* Add the extension for F* *) let extract_filename = extract_filebasename ^ ext in extract_file gen_config gen_ctx extract_filename crate.A.name module_name "" [] []