Source file safe_typing.ml
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open Util
open Names
open Declarations
open Constr
open Context.Named.Declaration
module NamedDecl = Context.Named.Declaration
(** {6 Safe environments }
Fields of [safe_environment] :
- [env] : the underlying environment (cf Environ)
- [modpath] : the current module name
- [modvariant] :
* NONE before coqtop initialization
* LIBRARY at toplevel of a compilation or a regular coqtop session
* STRUCT (params,oldsenv) : inside a local module, with
module parameters [params] and earlier environment [oldsenv]
* SIG (params,oldsenv) : same for a local module type
- [modresolver] : delta_resolver concerning the module content, that needs to
be marshalled on disk
- [paramresolver] : delta_resolver in scope but not part of the library per
se, that is from functor parameters and required libraries
- [revstruct] : current module content, most recent declarations first
- [modlabels] and [objlabels] : names defined in the current module,
either for modules/modtypes or for constants/inductives.
These fields could be deduced from [revstruct], but they allow faster
name freshness checks.
- [univ] : current universe constraints
- [future_cst] : delayed opaque constants yet to be checked
- [required] : names and digests of Require'd libraries since big-bang.
This field will only grow
- [loads] : list of libraries Require'd inside the current module.
They will be propagated to the upper module level when
the current module ends.
- [local_retroknowledge]
*)
type vodigest =
| Dvo_or_vi of Digest.t
| Dvivo of Digest.t * Digest.t
let digest_match ~actual ~required =
match actual, required with
| Dvo_or_vi d1, Dvo_or_vi d2
| Dvivo (d1,_), Dvo_or_vi d2 -> String.equal d1 d2
| Dvivo (d1,e1), Dvivo (d2,e2) -> String.equal d1 d2 && String.equal e1 e2
| Dvo_or_vi _, Dvivo _ -> false
type library_info = DirPath.t * vodigest
(** Functor and funsig parameters, most recent first *)
type module_parameters = (MBId.t * module_type_body) list
type compiled_library = {
comp_name : DirPath.t;
comp_mod : module_body;
comp_univs : Univ.ContextSet.t;
comp_deps : library_info array;
}
type reimport = compiled_library * Univ.ContextSet.t * vodigest
(** Part of the safe_env at a section opening time to be backtracked *)
type section_data = {
rev_env : Environ.env;
rev_univ : Univ.ContextSet.t;
rev_objlabels : Label.Set.t;
rev_reimport : reimport list;
rev_revstruct : structure_body;
}
module HandleMap = Opaqueproof.HandleMap
(** We rely on uniqueness of pointers to provide a simple implementation of
kernel certificates. For this to work across processes, one needs the
safe environments to be marshaled at the same time as their corresponding
certificates and sharing to be preserved. *)
module Nonce :
sig
type t
val create : unit -> t
val equal : t -> t -> bool
end =
struct
type t = unit ref
let create () = ref ()
let equal x y = x == y
end
type safe_environment =
{ env : Environ.env;
sections : section_data Section.t option;
modpath : ModPath.t;
modvariant : modvariant;
modresolver : Mod_subst.delta_resolver;
paramresolver : Mod_subst.delta_resolver;
revstruct : structure_body;
modlabels : Label.Set.t;
objlabels : Label.Set.t;
univ : Univ.ContextSet.t;
future_cst : (Term_typing.typing_context * safe_environment * Nonce.t) HandleMap.t;
required : vodigest DPmap.t;
loads : (ModPath.t * module_body) list;
local_retroknowledge : Retroknowledge.action list;
}
and modvariant =
| NONE
| LIBRARY
| SIG of module_parameters * safe_environment (** saved env *)
| STRUCT of module_parameters * safe_environment (** saved env *)
let rec library_dp_of_senv senv =
match senv.modvariant with
| NONE | LIBRARY -> ModPath.dp senv.modpath
| SIG(_,senv) -> library_dp_of_senv senv
| STRUCT(_,senv) -> library_dp_of_senv senv
let empty_environment =
{ env = Environ.empty_env;
modpath = ModPath.initial;
modvariant = NONE;
modresolver = Mod_subst.empty_delta_resolver;
paramresolver = Mod_subst.empty_delta_resolver;
revstruct = [];
modlabels = Label.Set.empty;
objlabels = Label.Set.empty;
sections = None;
future_cst = HandleMap.empty;
univ = Univ.ContextSet.empty;
required = DPmap.empty;
loads = [];
local_retroknowledge = [];
}
let is_initial senv =
match senv.revstruct, senv.modvariant with
| [], NONE -> ModPath.equal senv.modpath ModPath.initial
| _ -> false
let sections_are_opened senv = not (Option.is_empty senv.sections)
let delta_of_senv senv = senv.modresolver,senv.paramresolver
let constant_of_delta_kn_senv senv kn =
Mod_subst.constant_of_deltas_kn senv.paramresolver senv.modresolver kn
let mind_of_delta_kn_senv senv kn =
Mod_subst.mind_of_deltas_kn senv.paramresolver senv.modresolver kn
(** The safe_environment state monad *)
type safe_transformer0 = safe_environment -> safe_environment
type 'a safe_transformer = safe_environment -> 'a * safe_environment
(** {6 Typing flags } *)
let set_typing_flags c senv =
let env = Environ.set_typing_flags c senv.env in
if env == senv.env then senv
else { senv with env }
let set_typing_flags flags senv =
if Option.has_some senv.sections
&& not (Environ.same_flags flags
{(Environ.typing_flags senv.env) with
conv_oracle = flags.conv_oracle;
share_reduction = flags.share_reduction;
})
then CErrors.user_err Pp.(str "Changing typing flags inside sections is not allowed.");
set_typing_flags flags senv
let set_impredicative_set b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with impredicative_set = b } senv
let set_check_guarded b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with check_guarded = b } senv
let set_check_positive b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with check_positive = b } senv
let set_check_universes b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with check_universes = b } senv
let set_indices_matter indices_matter senv =
set_typing_flags { (Environ.typing_flags senv.env) with indices_matter } senv
let set_share_reduction b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with share_reduction = b } senv
let set_VM b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with enable_VM = b } senv
let set_native_compiler b senv =
let flags = Environ.typing_flags senv.env in
set_typing_flags { flags with enable_native_compiler = b } senv
let set_allow_sprop b senv = { senv with env = Environ.set_allow_sprop b senv.env }
let with_typing_flags ?typing_flags senv ~f =
match typing_flags with
| None -> f senv
| Some typing_flags ->
let orig_typing_flags = Environ.typing_flags senv.env in
let res, senv = f (set_typing_flags typing_flags senv) in
res, set_typing_flags orig_typing_flags senv
(** {6 Stm machinery } *)
module Certificate :
sig
type t
val make : safe_environment -> t
val universes : t -> Univ.ContextSet.t
(** Checks whether [dst] is a valid extension of [src] *)
val check : src:t -> dst:t -> bool
end =
struct
type t = {
certif_struc : Declarations.structure_body;
certif_univs : Univ.ContextSet.t;
}
let make senv = {
certif_struc = senv.revstruct;
certif_univs = senv.univ;
}
let is_suffix l suf = match l with
| [] -> false
| _ :: l -> l == suf
let is_subset (s1, cst1) (s2, cst2) =
Univ.Level.Set.subset s1 s2 && Univ.Constraints.subset cst1 cst2
let check ~src ~dst =
is_suffix dst.certif_struc src.certif_struc &&
is_subset src.certif_univs dst.certif_univs
let universes c = c.certif_univs
end
type side_effect = {
seff_certif : Certificate.t CEphemeron.key;
seff_constant : Constant.t;
seff_body : Constr.t Declarations.pconstant_body;
seff_univs : Univ.ContextSet.t;
}
module SideEffects :
sig
type t
val repr : t -> side_effect list
val empty : t
val is_empty : t -> bool
val add : side_effect -> t -> t
val concat : t -> t -> t
end =
struct
module SeffOrd = struct
type t = side_effect
let compare e1 e2 =
Constant.CanOrd.compare e1.seff_constant e2.seff_constant
end
module SeffSet = Set.Make(SeffOrd)
type t = { seff : side_effect list; elts : SeffSet.t }
(** Invariant: [seff] is a permutation of the elements of [elts] *)
let repr eff = eff.seff
let empty = { seff = []; elts = SeffSet.empty }
let is_empty { seff; elts } = List.is_empty seff && SeffSet.is_empty elts
let add x es =
if SeffSet.mem x es.elts then es
else { seff = x :: es.seff; elts = SeffSet.add x es.elts }
let concat xes yes =
List.fold_right add xes.seff yes
end
type private_constants = SideEffects.t
let side_effects_of_private_constants l =
List.rev (SideEffects.repr l)
let lift_constant c =
let body = match c.const_body with
| OpaqueDef _ -> Undef None
| Def _ | Undef _ | Primitive _ as body -> body
in
{ c with const_body = body }
let push_private_constants env eff =
let eff = side_effects_of_private_constants eff in
let add_if_undefined env eff =
if Environ.mem_constant eff.seff_constant env then env
else Environ.add_constant eff.seff_constant (lift_constant eff.seff_body) env
in
List.fold_left add_if_undefined env eff
let empty_private_constants = SideEffects.empty
let is_empty_private_constants c = SideEffects.is_empty c
let concat_private = SideEffects.concat
let universes_of_private eff =
let fold acc eff = Univ.ContextSet.union eff.seff_univs acc in
List.fold_left fold Univ.ContextSet.empty (side_effects_of_private_constants eff)
let env_of_safe_env senv = senv.env
let env_of_senv = env_of_safe_env
let structure_body_of_safe_env env = env.revstruct
let sections_of_safe_env senv = senv.sections
let get_section = function
| None -> CErrors.user_err Pp.(str "No open section.")
| Some s -> s
let push_context_set ~strict cst senv =
if Univ.ContextSet.is_empty cst then senv
else
let sections = Option.map (Section.push_constraints cst) senv.sections
in
{ senv with
env = Environ.push_context_set ~strict cst senv.env;
univ = Univ.ContextSet.union cst senv.univ;
sections }
let add_constraints cst senv =
push_context_set ~strict:true cst senv
let is_curmod_library senv =
match senv.modvariant with LIBRARY -> true | _ -> false
let is_joined_environment e = HandleMap.is_empty e.future_cst
(** {6 Various checks } *)
let exists_modlabel l senv = Label.Set.mem l senv.modlabels
let exists_objlabel l senv = Label.Set.mem l senv.objlabels
let check_modlabel l senv =
if exists_modlabel l senv then Modops.error_existing_label l
let check_objlabel l senv =
if exists_objlabel l senv then Modops.error_existing_label l
let check_objlabels ls senv =
Label.Set.iter (fun l -> check_objlabel l senv) ls
(** Are we closing the right module / modtype ?
No user error here, since the opening/ending coherence
is now verified in [vernac_end_segment] *)
let check_current_label lab = function
| MPdot (_,l) -> assert (Label.equal lab l)
| _ -> assert false
let check_struct = function
| STRUCT (params,oldsenv) -> params, oldsenv
| NONE | LIBRARY | SIG _ -> assert false
let check_sig = function
| SIG (params,oldsenv) -> params, oldsenv
| NONE | LIBRARY | STRUCT _ -> assert false
let check_current_library dir senv = match senv.modvariant with
| LIBRARY -> assert (ModPath.equal senv.modpath (MPfile dir))
| NONE | STRUCT _ | SIG _ -> assert false
(** When operating on modules, we're normally outside sections *)
let check_empty_context senv =
assert (Environ.empty_context senv.env && Option.is_empty senv.sections)
(** When adding a parameter to the current module/modtype,
it must have been freshly started *)
let check_empty_struct senv =
assert (List.is_empty senv.revstruct
&& List.is_empty senv.loads)
(** When starting a library, the current environment should be initial
i.e. only composed of Require's *)
let check_initial senv = assert (is_initial senv)
(** When loading a library, its dependencies should be already there,
with the correct digests. *)
let check_required current_libs needed =
let check (id,required) =
try
let actual = DPmap.find id current_libs in
if not(digest_match ~actual ~required) then
CErrors.user_err Pp.(pr_sequence str
["Inconsistent assumptions over module"; DirPath.to_string id; "."])
with Not_found ->
CErrors.user_err Pp.(pr_sequence str ["Reference to unknown module"; DirPath.to_string id; "."])
in
Array.iter check needed
(** {6 Insertion of section variables} *)
(** They are now typed before being added to the environment.
Same as push_named, but check that the variable is not already
there. Should *not* be done in Environ because tactics add temporary
hypothesis many many times, and the check performed here would
cost too much. *)
let safe_push_named d env =
let id = NamedDecl.get_id d in
let _ =
try
let _ = Environ.lookup_named id env in
CErrors.user_err Pp.(pr_sequence str ["Identifier"; Id.to_string id; "already defined."])
with Not_found -> () in
Environ.push_named d env
let push_named_def (id,de) senv =
let sections = get_section senv.sections in
let c, r, typ = Term_typing.translate_local_def senv.env id de in
let d = LocalDef (Context.make_annot id r, c, typ) in
let env'' = safe_push_named d senv.env in
let sections = Section.push_local d sections in
{ senv with sections=Some sections; env = env'' }
let push_named_assum (x,t) senv =
let sections = get_section senv.sections in
let t, r = Term_typing.translate_local_assum senv.env t in
let d = LocalAssum (Context.make_annot x r, t) in
let sections = Section.push_local d sections in
let env'' = safe_push_named d senv.env in
{ senv with sections=Some sections; env = env'' }
let push_section_context uctx senv =
let sections = get_section senv.sections in
let sections = Section.push_local_universe_context uctx sections in
let senv = { senv with sections=Some sections } in
let ctx = Univ.ContextSet.of_context uctx in
let () = assert (Univ.Level.Set.for_all (fun u -> not (Univ.Level.Set.mem u (fst senv.univ))) (fst ctx)) in
{ senv with
env = Environ.push_context_set ~strict:false ctx senv.env;
univ = Univ.ContextSet.union ctx senv.univ }
(** {6 Insertion of new declarations to current environment } *)
let labels_of_mib mib =
let add,get =
let labels = ref Label.Set.empty in
(fun id -> labels := Label.Set.add (Label.of_id id) !labels),
(fun () -> !labels)
in
let visit_mip mip =
add mip.mind_typename;
Array.iter add mip.mind_consnames
in
Array.iter visit_mip mib.mind_packets;
get ()
let add_retroknowledge pttc senv =
{ senv with
env = Primred.add_retroknowledge senv.env pttc;
local_retroknowledge = pttc::senv.local_retroknowledge }
(** A generic function for adding a new field in a same environment.
It also performs the corresponding [add_constraints]. *)
type generic_name =
| C of Constant.t
| I of MutInd.t
| M (** name already known, cf the mod_mp field *)
| MT (** name already known, cf the mod_mp field *)
let add_field ((l,sfb) as field) gn senv =
let mlabs,olabs = match sfb with
| SFBmind mib ->
let l = labels_of_mib mib in
check_objlabels l senv; (Label.Set.empty,l)
| SFBconst _ ->
check_objlabel l senv; (Label.Set.empty, Label.Set.singleton l)
| SFBmodule _ | SFBmodtype _ ->
check_modlabel l senv; (Label.Set.singleton l, Label.Set.empty)
in
let env' = match sfb, gn with
| SFBconst cb, C con -> Environ.add_constant con cb senv.env
| SFBmind mib, I mind -> Environ.add_mind mind mib senv.env
| SFBmodtype mtb, MT -> Environ.add_modtype mtb senv.env
| SFBmodule mb, M -> Modops.add_module mb senv.env
| _ -> assert false
in
let sections = match senv.sections with
| None -> None
| Some sections ->
match sfb, gn with
| SFBconst cb, C con ->
let poly = Declareops.constant_is_polymorphic cb in
Some Section.(push_global ~poly env' (SecDefinition con) sections)
| SFBmind mib, I mind ->
let poly = Declareops.inductive_is_polymorphic mib in
Some Section.(push_global ~poly env' (SecInductive mind) sections)
| _, (M | MT) -> Some sections
| _ -> assert false
in
{ senv with
env = env';
sections;
revstruct = field :: senv.revstruct;
modlabels = Label.Set.union mlabs senv.modlabels;
objlabels = Label.Set.union olabs senv.objlabels }
(** Applying a certain function to the resolver of a safe environment *)
let update_resolver f senv = { senv with modresolver = f senv.modresolver }
type global_declaration =
| ConstantEntry : Entries.constant_entry -> global_declaration
| OpaqueEntry : unit Entries.opaque_entry -> global_declaration
type exported_opaque = {
exp_handle : Opaqueproof.opaque_handle;
exp_body : Constr.t;
exp_univs : int option;
}
type exported_private_constant = Constant.t * exported_opaque option
let repr_exported_opaque o =
let priv = match o .exp_univs with
| None -> Opaqueproof.PrivateMonomorphic ()
| Some _ -> Opaqueproof.PrivatePolymorphic Univ.ContextSet.empty
in
(o.exp_handle, (o.exp_body, priv))
let add_constant_aux senv (kn, cb) =
let l = Constant.label kn in
let cb = if sections_are_opened senv then cb else Declareops.hcons_const_body cb in
let senv' = add_field (l,SFBconst cb) (C kn) senv in
let senv'' = match cb.const_body with
| Undef (Some lev) ->
update_resolver
(Mod_subst.add_inline_delta_resolver (Constant.user kn) (lev,None)) senv'
| _ -> senv'
in
senv''
let inline_side_effects env body side_eff =
let open Constr in
(** First step: remove the constants that are still in the environment *)
let filter e =
if Environ.mem_constant e.seff_constant env then None
else Some e
in
let side_eff = List.map_filter filter (SideEffects.repr side_eff) in
let sigs = List.rev_map (fun e -> e.seff_certif) side_eff in
(** Most recent side-effects first in side_eff *)
if List.is_empty side_eff then (body, Univ.ContextSet.empty, sigs, 0)
else
(** Second step: compute the lifts and substitutions to apply *)
let cname c r = Context.make_annot (Name (Label.to_id (Constant.label c))) r in
let fold (subst, var, ctx, args) { seff_constant = c; seff_body = cb; seff_univs = univs; _ } =
let (b, opaque) = match cb.const_body with
| Def b -> (b, false)
| OpaqueDef b -> (b, true)
| _ -> assert false
in
match cb.const_universes with
| Monomorphic ->
(** Abstract over the term at the top of the proof *)
let ty = cb.const_type in
let subst = Cmap_env.add c (Inr var) subst in
let ctx = Univ.ContextSet.union ctx univs in
(subst, var + 1, ctx, (cname c cb.const_relevance, b, ty, opaque) :: args)
| Polymorphic _ ->
let () = assert (Univ.ContextSet.is_empty univs) in
(** Inline the term to emulate universe polymorphism *)
let subst = Cmap_env.add c (Inl b) subst in
(subst, var, ctx, args)
in
let (subst, len, ctx, args) = List.fold_left fold (Cmap_env.empty, 1, Univ.ContextSet.empty, []) side_eff in
(** Third step: inline the definitions *)
let rec subst_const i k t = match Constr.kind t with
| Const (c, u) ->
let data = try Some (Cmap_env.find c subst) with Not_found -> None in
begin match data with
| None -> t
| Some (Inl b) ->
(** [b] is closed but may refer to other constants *)
subst_const i k (Vars.subst_instance_constr u b)
| Some (Inr n) ->
mkRel (k + n - i)
end
| Rel n ->
(** Lift free rel variables *)
if n <= k then t
else mkRel (n + len - i - 1)
| _ -> Constr.map_with_binders ((+) 1) (fun k t -> subst_const i k t) k t
in
let map_args i (na, b, ty, opaque) =
(** Both the type and the body may mention other constants *)
let ty = subst_const (len - i - 1) 0 ty in
let b = subst_const (len - i - 1) 0 b in
(na, b, ty, opaque)
in
let args = List.mapi map_args args in
let body = subst_const 0 0 body in
let fold_arg (na, b, ty, opaque) accu =
if opaque then mkApp (mkLambda (na, ty, accu), [|b|])
else mkLetIn (na, b, ty, accu)
in
let body = List.fold_right fold_arg args body in
(body, ctx, sigs, len - 1)
let inline_private_constants env ((body, ctx), side_eff) =
let body, ctx', _, _ = inline_side_effects env body side_eff in
let ctx' = Univ.ContextSet.union ctx ctx' in
(body, ctx')
let check_signatures senv sl =
let curmb = Certificate.make senv in
let is_direct_ancestor accu mb =
match accu with
| None -> None
| Some curmb ->
try
let mb = CEphemeron.get mb in
if Certificate.check ~src:curmb ~dst:mb
then Some mb
else None
with CEphemeron.InvalidKey -> None in
let sl = List.fold_left is_direct_ancestor (Some curmb) sl in
match sl with
| None -> None
| Some mb ->
let univs = Certificate.universes mb in
Some (Univ.ContextSet.diff univs senv.univ)
type side_effect_declaration =
| DefinitionEff : Entries.definition_entry -> side_effect_declaration
| OpaqueEff : Constr.constr Entries.opaque_entry -> side_effect_declaration
let constant_entry_of_side_effect eff =
let cb = eff.seff_body in
let open Entries in
let univs =
match cb.const_universes with
| Monomorphic ->
Monomorphic_entry
| Polymorphic auctx ->
Polymorphic_entry (Univ.AbstractContext.repr auctx)
in
let p =
match cb.const_body with
| OpaqueDef b -> b
| Def b -> b
| _ -> assert false in
if Declareops.is_opaque cb then
OpaqueEff {
opaque_entry_body = p;
opaque_entry_secctx = Context.Named.to_vars cb.const_hyps;
opaque_entry_type = cb.const_type;
opaque_entry_universes = univs;
}
else
DefinitionEff {
const_entry_body = p;
const_entry_secctx = Some (Context.Named.to_vars cb.const_hyps);
const_entry_type = Some cb.const_type;
const_entry_universes = univs;
const_entry_inline_code = cb.const_inline_code }
let export_eff eff =
(eff.seff_constant, eff.seff_body)
let is_empty_private = function
| Opaqueproof.PrivateMonomorphic ctx -> Univ.ContextSet.is_empty ctx
| Opaqueproof.PrivatePolymorphic ctx -> Univ.ContextSet.is_empty ctx
let translate_direct_opaque ~sec_univs env kn ce =
let cb, ctx = Term_typing.translate_opaque ~sec_univs env kn ce in
let body = ce.Entries.opaque_entry_body, Univ.ContextSet.empty in
let handle _env c () = (c, Univ.ContextSet.empty, 0) in
let (c, u) = Term_typing.check_delayed handle ctx (body, ()) in
let () = assert (is_empty_private u) in
{ cb with const_body = OpaqueDef c }
let export_side_effects senv eff =
let sec_univs = Option.map Section.all_poly_univs senv.sections in
let env = senv.env in
let not_exists e = not (Environ.mem_constant e.seff_constant env) in
let aux (acc,sl) e =
if not (not_exists e) then acc, sl
else e :: acc, e.seff_certif :: sl in
let seff, signatures = List.fold_left aux ([],[]) (SideEffects.repr eff) in
let trusted = check_signatures senv signatures in
let push_seff env eff =
let { seff_constant = kn; seff_body = cb ; _ } = eff in
let env = Environ.add_constant kn (lift_constant cb) env in
env
in
match trusted with
| Some univs ->
univs, List.map export_eff seff
| None ->
let rec recheck_seff seff univs acc env = match seff with
| [] -> univs, List.rev acc
| eff :: rest ->
let uctx = eff.seff_univs in
let env = Environ.push_context_set ~strict:true uctx env in
let univs = Univ.ContextSet.union uctx univs in
let env, cb =
let kn = eff.seff_constant in
let ce = constant_entry_of_side_effect eff in
let open Entries in
let cb = match ce with
| DefinitionEff ce ->
Term_typing.translate_constant ~sec_univs env kn (DefinitionEntry ce)
| OpaqueEff ce ->
translate_direct_opaque ~sec_univs env kn ce
in
let eff = { eff with seff_body = cb } in
(push_seff env eff, export_eff eff)
in
recheck_seff rest univs (cb :: acc) env
in
recheck_seff seff Univ.ContextSet.empty [] env
let push_opaque_proof senv =
let o, otab = Opaqueproof.create (library_dp_of_senv senv) (Environ.opaque_tables senv.env) in
let senv = { senv with env = Environ.set_opaque_tables senv.env otab } in
senv, o
let export_private_constants eff senv =
let uctx, exported = export_side_effects senv eff in
let senv = push_context_set ~strict:true uctx senv in
let map senv (kn, c) = match c.const_body with
| OpaqueDef body ->
let senv, o = push_opaque_proof senv in
let (_, _, _, h) = Opaqueproof.repr o in
let univs = match c.const_universes with
| Monomorphic -> None
| Polymorphic auctx -> Some (Univ.AbstractContext.size auctx)
in
let body = Constr.hcons body in
let opaque = { exp_body = body; exp_handle = h; exp_univs = univs } in
senv, (kn, { c with const_body = OpaqueDef o }, Some opaque)
| Def _ | Undef _ | Primitive _ as body ->
senv, (kn, { c with const_body = body }, None)
in
let senv, bodies = List.fold_left_map map senv exported in
let exported = List.map (fun (kn, _, opaque) -> kn, opaque) bodies in
let fold senv (kn, cb, _) = add_constant_aux senv (kn, cb) in
let senv = List.fold_left fold senv bodies in
exported, senv
let add_constant l decl senv =
let kn = Constant.make2 senv.modpath l in
let senv, cb =
let sec_univs = Option.map Section.all_poly_univs senv.sections in
match decl with
| OpaqueEntry ce ->
let senv, o = push_opaque_proof senv in
let cb, ctx = Term_typing.translate_opaque ~sec_univs senv.env kn ce in
let (_, _, _, i) = Opaqueproof.repr o in
let nonce = Nonce.create () in
let future_cst = HandleMap.add i (ctx, senv, nonce) senv.future_cst in
let senv = { senv with future_cst } in
senv, { cb with const_body = OpaqueDef o }
| ConstantEntry ce ->
senv, Term_typing.translate_constant ~sec_univs senv.env kn ce
in
let senv = add_constant_aux senv (kn, cb) in
let senv =
match decl with
| ConstantEntry (Entries.PrimitiveEntry { Entries.prim_entry_content = CPrimitives.OT_type t; _ }) ->
if sections_are_opened senv then CErrors.anomaly (Pp.str "Primitive type not allowed in sections");
add_retroknowledge (Retroknowledge.Register_type(t,kn)) senv
| _ -> senv
in
kn, senv
let add_constant ?typing_flags l decl senv =
with_typing_flags ?typing_flags senv ~f:(add_constant l decl)
type opaque_certificate = {
opq_body : Constr.t;
opq_univs : Univ.ContextSet.t Opaqueproof.delayed_universes;
opq_handle : Opaqueproof.opaque_handle;
opq_nonce : Nonce.t;
}
let check_opaque senv (i : Opaqueproof.opaque_handle) pf =
let ty_ctx, trust, nonce =
try HandleMap.find i senv.future_cst
with Not_found ->
CErrors.anomaly Pp.(str "Missing opaque with identifier " ++ int (Opaqueproof.repr_handle i))
in
let handle env body eff =
let body, uctx, signatures, skip = inline_side_effects env body eff in
let trusted = check_signatures trust signatures in
let trusted, uctx = match trusted with
| None -> 0, uctx
| Some univs -> skip, Univ.ContextSet.union univs uctx
in
body, uctx, trusted
in
let (c, ctx) = Term_typing.check_delayed handle ty_ctx pf in
let c = Constr.hcons c in
let ctx = match ctx with
| Opaqueproof.PrivateMonomorphic u ->
Opaqueproof.PrivateMonomorphic (Univ.hcons_universe_context_set u)
| Opaqueproof.PrivatePolymorphic u ->
Opaqueproof.PrivatePolymorphic (Univ.hcons_universe_context_set u)
in
{ opq_body = c; opq_univs = ctx; opq_handle = i; opq_nonce = nonce }
let fill_opaque { opq_univs = ctx; opq_handle = i; opq_nonce = n; _ } senv =
let () = if not @@ HandleMap.mem i senv.future_cst then
CErrors.anomaly Pp.(str "Missing opaque handle" ++ spc () ++ int (Opaqueproof.repr_handle i))
in
let _, _, nonce = HandleMap.find i senv.future_cst in
let () =
if not (Nonce.equal n nonce) then
CErrors.anomaly Pp.(str "Invalid opaque certificate")
in
let senv = match ctx with
| Opaqueproof.PrivateMonomorphic ctx -> add_constraints ctx senv
| Opaqueproof.PrivatePolymorphic _ -> senv
in
{ senv with future_cst = HandleMap.remove i senv.future_cst }
let is_filled_opaque i senv =
let () = assert (Opaqueproof.mem_handle i (Environ.opaque_tables senv.env)) in
not (HandleMap.mem i senv.future_cst)
let repr_certificate { opq_body = body; opq_univs = ctx; _ } =
body, ctx
let check_constraints uctx = function
| Entries.Polymorphic_entry _ -> Univ.ContextSet.is_empty uctx
| Entries.Monomorphic_entry -> true
let add_private_constant l uctx decl senv : (Constant.t * private_constants) * safe_environment =
let kn = Constant.make2 senv.modpath l in
let senv = push_context_set ~strict:true uctx senv in
let cb =
let sec_univs = Option.map Section.all_poly_univs senv.sections in
match decl with
| OpaqueEff ce ->
let () = assert (check_constraints uctx ce.Entries.opaque_entry_universes) in
translate_direct_opaque ~sec_univs senv.env kn ce
| DefinitionEff ce ->
let () = assert (check_constraints uctx ce.Entries.const_entry_universes) in
Term_typing.translate_constant ~sec_univs senv.env kn (Entries.DefinitionEntry ce)
in
let dcb = match cb.const_body with
| Def _ as const_body -> { cb with const_body }
| OpaqueDef _ ->
{ cb with const_body = Undef None }
| Undef _ | Primitive _ -> assert false
in
let senv = add_constant_aux senv (kn, dcb) in
let eff =
let from_env = CEphemeron.create (Certificate.make senv) in
let eff = {
seff_certif = from_env;
seff_constant = kn;
seff_body = cb;
seff_univs = uctx;
} in
SideEffects.add eff empty_private_constants
in
(kn, eff), senv
(** Insertion of inductive types *)
let check_mind mie lab =
let open Entries in
match mie.mind_entry_inds with
| [] -> assert false
| oie::_ ->
assert (Id.equal (Label.to_id lab) oie.mind_entry_typename)
let add_checked_mind kn mib senv =
let mib =
match mib.mind_hyps with [] -> Declareops.hcons_mind mib | _ -> mib
in
add_field (MutInd.label kn,SFBmind mib) (I kn) senv
let add_mind l mie senv =
let () = check_mind mie l in
let kn = MutInd.make2 senv.modpath l in
let sec_univs = Option.map Section.all_poly_univs senv.sections in
let mib = Indtypes.check_inductive senv.env ~sec_univs kn mie in
let senv = match mib.mind_template with
| None -> senv
| Some { template_context = ctx; _ } -> push_context_set ~strict:true ctx senv
in
kn, add_checked_mind kn mib senv
let add_mind ?typing_flags l mie senv =
with_typing_flags ?typing_flags senv ~f:(add_mind l mie)
(** Insertion of module types *)
let check_state senv =
(Environ.universes senv.env, Reduction.checked_universes)
let add_modtype l params_mte inl senv =
let mp = MPdot(senv.modpath, l) in
let state = check_state senv in
let mtb, _ = Mod_typing.translate_modtype state senv.env mp inl params_mte in
let mtb = Declareops.hcons_module_type mtb in
let senv = add_field (l,SFBmodtype mtb) MT senv in
mp, senv
(** full_add_module adds module with universes and constraints *)
let full_add_module mb senv =
let dp = ModPath.dp mb.mod_mp in
let linkinfo = Nativecode.link_info_of_dirpath dp in
{ senv with env = Modops.add_linked_module mb linkinfo senv.env }
let full_add_module_type mp mt senv =
{ senv with env = Modops.add_module_type mp mt senv.env }
(** Insertion of modules *)
let add_module l me inl senv =
let mp = MPdot(senv.modpath, l) in
let state = check_state senv in
let mb, _ = Mod_typing.translate_module state senv.env mp inl me in
let mb = Declareops.hcons_module_body mb in
let senv = add_field (l,SFBmodule mb) M senv in
let senv =
if Modops.is_functor mb.mod_type then senv
else update_resolver (Mod_subst.add_delta_resolver mb.mod_delta) senv
in
(mp,mb.mod_delta),senv
(** {6 Starting / ending interactive modules and module types } *)
let start_module l senv =
let () = check_modlabel l senv in
let () = check_empty_context senv in
let mp = MPdot(senv.modpath, l) in
mp,
{ empty_environment with
env = senv.env;
future_cst = senv.future_cst;
modresolver = senv.modresolver;
paramresolver = senv.paramresolver;
modpath = mp;
modvariant = STRUCT ([],senv);
univ = senv.univ;
required = senv.required }
let start_modtype l senv =
let () = check_modlabel l senv in
let () = check_empty_context senv in
let mp = MPdot(senv.modpath, l) in
mp,
{ empty_environment with
env = senv.env;
future_cst = senv.future_cst;
modresolver = senv.modresolver;
paramresolver = senv.paramresolver;
modpath = mp;
modvariant = SIG ([], senv);
univ = senv.univ;
required = senv.required }
(** Adding parameters to the current module or module type.
This module should have been freshly started. *)
let add_module_parameter mbid mte inl senv =
let () = check_empty_struct senv in
let mp = MPbound mbid in
let state = check_state senv in
let mtb, _ = Mod_typing.translate_modtype state senv.env mp inl ([],mte) in
let senv = full_add_module_type mp mtb senv in
let new_variant = match senv.modvariant with
| STRUCT (params,oldenv) -> STRUCT ((mbid,mtb) :: params, oldenv)
| SIG (params,oldenv) -> SIG ((mbid,mtb) :: params, oldenv)
| _ -> assert false
in
let new_paramresolver =
if Modops.is_functor mtb.mod_type then senv.paramresolver
else Mod_subst.add_delta_resolver mtb.mod_delta senv.paramresolver
in
mtb.mod_delta,
{ senv with
modvariant = new_variant;
paramresolver = new_paramresolver }
let rec module_num_parameters senv =
match senv.modvariant with
| STRUCT (params,senv) -> List.length params :: module_num_parameters senv
| SIG (params,senv) -> List.length params :: module_num_parameters senv
| _ -> []
let rec module_is_modtype senv =
match senv.modvariant with
| STRUCT (_,senv) -> false :: module_is_modtype senv
| SIG (_,senv) -> true :: module_is_modtype senv
| _ -> []
let functorize params init =
List.fold_left (fun e (mbid,mt) -> MoreFunctor(mbid,mt,e)) init params
let propagate_loads senv =
List.fold_left
(fun env (_,mb) -> full_add_module mb env)
senv
(List.rev senv.loads)
(** Build the module body of the current module, taking in account
a possible return type (_:T) *)
let functorize_module params mb =
let f x = functorize params x in
{ mb with
mod_expr = Modops.implem_smart_map f f mb.mod_expr;
mod_type = f mb.mod_type;
mod_type_alg = Option.map f mb.mod_type_alg }
let build_module_body params restype senv =
let struc = NoFunctor (List.rev senv.revstruct) in
let restype' = Option.map (fun (ty,inl) -> (([],ty),inl)) restype in
let state = check_state senv in
let mb, _ =
Mod_typing.finalize_module state senv.env senv.modpath
(struc,None,senv.modresolver) restype'
in
let mb' = functorize_module params mb in
{ mb' with mod_retroknowledge = ModBodyRK senv.local_retroknowledge }
(** Returning back to the old pre-interactive-module environment,
with one extra component and some updated fields
(constraints, required, etc) *)
let allow_delayed_constants = ref false
let propagate_senv newdef newenv newresolver senv oldsenv =
if not !allow_delayed_constants && not (HandleMap.is_empty senv.future_cst) then
CErrors.anomaly ~label:"safe_typing"
Pp.(str "True Future.t were created for opaque constants even if -async-proofs is off");
{ oldsenv with
env = newenv;
modresolver = newresolver;
revstruct = newdef::oldsenv.revstruct;
modlabels = Label.Set.add (fst newdef) oldsenv.modlabels;
univ = senv.univ;
future_cst = senv.future_cst;
required = senv.required;
loads = senv.loads@oldsenv.loads;
local_retroknowledge =
senv.local_retroknowledge@oldsenv.local_retroknowledge;
}
let end_module l restype senv =
let mp = senv.modpath in
let params, oldsenv = check_struct senv.modvariant in
let () = check_current_label l mp in
let () = check_empty_context senv in
let mbids = List.rev_map fst params in
let mb = build_module_body params restype senv in
let newenv = Environ.set_opaque_tables oldsenv.env (Environ.opaque_tables senv.env) in
let newenv = Environ.set_universes (Environ.universes senv.env) newenv in
let senv' = propagate_loads { senv with env = newenv } in
let newenv = Modops.add_module mb newenv in
let newresolver =
if Modops.is_functor mb.mod_type then oldsenv.modresolver
else Mod_subst.add_delta_resolver mb.mod_delta oldsenv.modresolver
in
(mp,mbids,mb.mod_delta),
propagate_senv (l,SFBmodule mb) newenv newresolver senv' oldsenv
let build_mtb mp sign delta =
{ mod_mp = mp;
mod_expr = ();
mod_type = sign;
mod_type_alg = None;
mod_delta = delta;
mod_retroknowledge = ModTypeRK }
let end_modtype l senv =
let mp = senv.modpath in
let params, oldsenv = check_sig senv.modvariant in
let () = check_current_label l mp in
let () = check_empty_context senv in
let mbids = List.rev_map fst params in
let newenv = Environ.set_opaque_tables oldsenv.env (Environ.opaque_tables senv.env) in
let newenv = Environ.set_universes (Environ.universes senv.env) newenv in
let senv' = propagate_loads {senv with env=newenv} in
let auto_tb = functorize params (NoFunctor (List.rev senv.revstruct)) in
let mtb = build_mtb mp auto_tb senv.modresolver in
let newenv = Environ.add_modtype mtb senv'.env in
let newresolver = oldsenv.modresolver in
(mp,mbids),
propagate_senv (l,SFBmodtype mtb) newenv newresolver senv' oldsenv
(** {6 Inclusion of module or module type } *)
let add_include me is_module inl senv =
let open Mod_typing in
let mp_sup = senv.modpath in
let state = check_state senv in
let sign,(),resolver, _ =
translate_mse_include is_module state senv.env mp_sup inl me
in
let struc = NoFunctor (List.rev senv.revstruct) in
let mb = build_mtb mp_sup struc senv.modresolver in
let rec compute_sign sign resolver =
match sign with
| MoreFunctor(mbid,mtb,str) ->
let state = check_state senv in
let (_ : UGraph.t) = Subtyping.check_subtypes state senv.env mb mtb in
let mpsup_delta =
Modops.inline_delta_resolver senv.env inl mp_sup mbid mtb senv.modresolver
in
let subst = Mod_subst.map_mbid mbid mp_sup mpsup_delta in
let resolver = Mod_subst.subst_codom_delta_resolver subst resolver in
compute_sign (Modops.subst_signature subst str) resolver
| NoFunctor str -> resolver, str
in
let resolver, str = compute_sign sign resolver in
let senv = update_resolver (Mod_subst.add_delta_resolver resolver) senv in
let add senv ((l,elem) as field) =
let new_name = match elem with
| SFBconst _ ->
C (Mod_subst.constant_of_delta_kn resolver (KerName.make mp_sup l))
| SFBmind _ ->
I (Mod_subst.mind_of_delta_kn resolver (KerName.make mp_sup l))
| SFBmodule _ -> M
| SFBmodtype _ -> MT
in
add_field field new_name senv
in
resolver, List.fold_left add senv str
(** {6 Libraries, i.e. compiled modules } *)
let module_of_library lib = lib.comp_mod
let univs_of_library lib = lib.comp_univs
(** FIXME: MS: remove?*)
let current_modpath senv = senv.modpath
let current_dirpath senv = Names.ModPath.dp (current_modpath senv)
let start_library dir senv =
check_initial senv;
assert (not (DirPath.is_empty dir));
let mp = MPfile dir in
mp,
{ empty_environment with
env = senv.env;
modpath = mp;
modvariant = LIBRARY;
required = senv.required }
let export ~output_native_objects senv dir =
let () = check_current_library dir senv in
let mp = senv.modpath in
let str = NoFunctor (List.rev senv.revstruct) in
let mb =
{ mod_mp = mp;
mod_expr = FullStruct;
mod_type = str;
mod_type_alg = None;
mod_delta = senv.modresolver;
mod_retroknowledge = ModBodyRK senv.local_retroknowledge
}
in
let ast, symbols =
if output_native_objects then
Nativelibrary.dump_library mp senv.env str
else [], Nativevalues.empty_symbols
in
let lib = {
comp_name = dir;
comp_mod = mb;
comp_univs = senv.univ;
comp_deps = Array.of_list (DPmap.bindings senv.required);
} in
mp, lib, (ast, symbols)
let import lib cst vodigest senv =
check_required senv.required lib.comp_deps;
if DirPath.equal (ModPath.dp senv.modpath) lib.comp_name then
CErrors.user_err
Pp.(strbrk "Cannot load a library with the same name as the current one ("
++ DirPath.print lib.comp_name ++ str").");
let mp = MPfile lib.comp_name in
let mb = lib.comp_mod in
let env = Environ.push_context_set ~strict:true
(Univ.ContextSet.union lib.comp_univs cst)
senv.env
in
let env =
let linkinfo = Nativecode.link_info_of_dirpath lib.comp_name in
Modops.add_linked_module mb linkinfo env
in
let sections =
Option.map (Section.map_custom (fun custom ->
{custom with rev_reimport = (lib,cst,vodigest) :: custom.rev_reimport}))
senv.sections
in
mp,
{ senv with
env;
paramresolver = Mod_subst.add_delta_resolver mb.mod_delta senv.paramresolver;
required = DPmap.add lib.comp_name vodigest senv.required;
loads = (mp,mb)::senv.loads;
sections;
}
(** {6 Interactive sections *)
let open_section senv =
let custom = {
rev_env = senv.env;
rev_univ = senv.univ;
rev_objlabels = senv.objlabels;
rev_reimport = [];
rev_revstruct = senv.revstruct;
} in
let sections = Section.open_section ~custom senv.sections in
{ senv with sections=Some sections }
let close_section senv =
let open Section in
let sections0 = get_section senv.sections in
let env0 = senv.env in
let sections, entries, cstrs, revert = Section.close_section sections0 in
let { rev_env = env; rev_univ = univ; rev_objlabels = objlabels;
rev_reimport; rev_revstruct = revstruct } = revert in
let env = Environ.set_opaque_tables env (Environ.opaque_tables env0) in
let senv = { senv with env; revstruct; sections; univ; objlabels; } in
let senv = List.fold_left (fun senv (lib,cst,vodigest) -> snd (import lib cst vodigest senv))
senv (List.rev rev_reimport)
in
let senv = push_context_set ~strict:true cstrs senv in
let fold entry senv =
match entry with
| SecDefinition kn ->
let cb = Environ.lookup_constant kn env0 in
let info = Section.segment_of_constant kn sections0 in
let cb = Discharge.cook_constant senv.env info cb in
add_constant_aux senv (kn, cb)
| SecInductive ind ->
let mib = Environ.lookup_mind ind env0 in
let info = Section.segment_of_inductive ind sections0 in
let mib = Discharge.cook_inductive info mib in
add_checked_mind ind mib senv
in
List.fold_right fold entries senv
(** {6 Safe typing } *)
type judgment = Environ.unsafe_judgment
let j_val j = j.Environ.uj_val
let j_type j = j.Environ.uj_type
let typing senv = Typeops.infer (env_of_senv senv)
(** {6 Retroknowledge / native compiler } *)
let register_inline kn senv =
let open Environ in
if not (evaluable_constant kn senv.env) then
CErrors.user_err Pp.(str "Register inline: an evaluable constant is expected");
let env = senv.env in
let cb = lookup_constant kn env in
let cb = {cb with const_inline_code = true} in
let env = add_constant kn cb env in { senv with env}
let check_register_ind (type t) ind (r : t CPrimitives.prim_ind) env =
let (mb,ob as spec) = Inductive.lookup_mind_specif env ind in
let check_if b msg =
if not b then
CErrors.user_err msg in
check_if (Int.equal (Array.length mb.mind_packets) 1) Pp.(str "A non mutual inductive is expected.");
let is_monomorphic = function Monomorphic -> true | Polymorphic _ -> false in
check_if (is_monomorphic mb.mind_universes) Pp.(str "A universe monomorphic inductive type is expected.");
check_if (not @@ Inductive.is_private spec) Pp.(str "A non-private inductive type is expected");
let check_nparams n =
check_if (Int.equal mb.mind_nparams n) Pp.(str "An inductive type with " ++ int n ++ str " parameters is expected")
in
let check_nconstr n =
check_if (Int.equal (Array.length ob.mind_consnames) n)
Pp.(str "an inductive type with " ++ int n ++ str " constructors is expected")
in
let check_name pos s =
check_if (Id.equal ob.mind_consnames.(pos) (Id.of_string s))
Pp.(str"the " ++ int (pos + 1) ++ str
"th constructor does not have the expected name: " ++ str s) in
let check_type pos t =
check_if (Constr.equal t ob.mind_user_lc.(pos))
Pp.(str"the " ++ int (pos + 1) ++ str
"th constructor does not have the expected type") in
let check_type_cte pos = check_type pos (Constr.mkInd ind) in
match r with
| CPrimitives.PIT_bool ->
check_nparams 0;
check_nconstr 2;
check_name 0 "true";
check_type_cte 0;
check_name 1 "false";
check_type_cte 1
| CPrimitives.PIT_carry ->
check_nparams 1;
check_nconstr 2;
let test_type pos =
let c = ob.mind_user_lc.(pos) in
let s = Pp.(str"the " ++ int (pos + 1) ++ str
"th constructor does not have the expected type") in
check_if (Constr.isProd c) s;
let (_,d,cd) = Constr.destProd c in
check_if (Constr.is_Type d) s;
check_if
(Constr.equal
(mkProd (Context.anonR,mkRel 1, mkApp (mkInd ind,[|mkRel 2|])))
cd)
s in
check_name 0 "C0";
test_type 0;
check_name 1 "C1";
test_type 1;
| CPrimitives.PIT_pair ->
check_nparams 2;
check_nconstr 1;
check_name 0 "pair";
let c = ob.mind_user_lc.(0) in
let s = Pp.str "the constructor does not have the expected type" in
begin match Term.decompose_prod c with
| ([_,b;_,a;_,_B;_,_A], codom) ->
check_if (is_Type _A) s;
check_if (is_Type _B) s;
check_if (Constr.equal a (mkRel 2)) s;
check_if (Constr.equal b (mkRel 2)) s;
check_if (Constr.equal codom (mkApp (mkInd ind,[|mkRel 4; mkRel 3|]))) s
| _ -> check_if false s
end
| CPrimitives.PIT_cmp ->
check_nparams 0;
check_nconstr 3;
check_name 0 "Eq";
check_type_cte 0;
check_name 1 "Lt";
check_type_cte 1;
check_name 2 "Gt";
check_type_cte 2
| CPrimitives.PIT_f_cmp ->
check_nconstr 4;
check_name 0 "FEq";
check_type_cte 0;
check_name 1 "FLt";
check_type_cte 1;
check_name 2 "FGt";
check_type_cte 2;
check_name 3 "FNotComparable";
check_type_cte 3
| CPrimitives.PIT_f_class ->
check_nconstr 9;
check_name 0 "PNormal";
check_type_cte 0;
check_name 1 "NNormal";
check_type_cte 1;
check_name 2 "PSubn";
check_type_cte 2;
check_name 3 "NSubn";
check_type_cte 3;
check_name 4 "PZero";
check_type_cte 4;
check_name 5 "NZero";
check_type_cte 5;
check_name 6 "PInf";
check_type_cte 6;
check_name 7 "NInf";
check_type_cte 7;
check_name 8 "NaN";
check_type_cte 8
let register_inductive ind prim senv =
check_register_ind ind prim senv.env;
let action = Retroknowledge.Register_ind(prim,ind) in
add_retroknowledge action senv
let add_constraints c =
add_constraints
(Univ.ContextSet.add_constraints c Univ.ContextSet.empty)
let set_strategy k l e = { e with env =
(Environ.set_oracle e.env
(Conv_oracle.set_strategy (Environ.oracle e.env) k l)) }