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|
open Names
open Term
open Vm
open Cemitcodes
open Cbytecodes
open Declarations
open Pre_env
open Cbytegen
external tcode_of_code : emitcodes -> int -> tcode = "coq_tcode_of_code"
external free_tcode : tcode -> unit = "coq_static_free"
external eval_tcode : tcode -> values array -> values = "coq_eval_tcode"
(*******************)
(* Linkage du code *)
(*******************)
(* Table des globaux *)
(* [global_data] contient les valeurs des constantes globales
(axiomes,definitions), les annotations des switch et les structured
constant *)
external global_data : unit -> values array = "get_coq_global_data"
(* [realloc_global_data n] augmente de n la taille de [global_data] *)
external realloc_global_data : int -> unit = "realloc_coq_global_data"
let check_global_data n =
if n >= Array.length (global_data()) then realloc_global_data n
let num_global = ref 0
let set_global v =
let n = !num_global in
check_global_data n;
(global_data()).(n) <- v;
incr num_global;
n
(* [global_transp],[global_boxed] contiennent les valeurs des
definitions gelees. Les deux versions sont maintenues en //.
[global_transp] contient la version transparente.
[global_boxed] contient la version gelees. *)
external global_boxed : unit -> bool array = "get_coq_global_boxed"
(* [realloc_global_data n] augmente de n la taille de [global_data] *)
external realloc_global_boxed : int -> unit = "realloc_coq_global_boxed"
let check_global_boxed n =
if n >= Array.length (global_boxed()) then realloc_global_boxed n
let num_boxed = ref 0
let boxed_tbl = Hashtbl.create 53
let cst_opaque = ref Cpred.full
let is_opaque kn = Cpred.mem kn !cst_opaque
let set_global_boxed kn v =
let n = !num_boxed in
check_global_boxed n;
(global_boxed()).(n) <- (is_opaque kn);
Hashtbl.add boxed_tbl kn n ;
incr num_boxed;
set_global (val_of_constant_def n kn v)
(* table pour les structured_constant et les annotations des switchs *)
let str_cst_tbl = Hashtbl.create 31
(* (structured_constant * int) Hashtbl.t*)
let annot_tbl = Hashtbl.create 31
(* (annot_switch * int) Hashtbl.t *)
(*************************************************************)
(*** Mise a jour des valeurs des variables et des constantes *)
(*************************************************************)
exception NotEvaluated
let key rk =
match !rk with
| Some k -> k
| _ -> raise NotEvaluated
(************************)
(* traduction des patch *)
(* slot_for_*, calcul la valeur de l'objet, la place
dans la table global, rend sa position dans la table *)
let slot_for_str_cst key =
try Hashtbl.find str_cst_tbl key
with Not_found ->
let n = set_global (val_of_str_const key) in
Hashtbl.add str_cst_tbl key n;
n
let slot_for_annot key =
try Hashtbl.find annot_tbl key
with Not_found ->
let n = set_global (Obj.magic key) in
Hashtbl.add annot_tbl key n;
n
let rec slot_for_getglobal env kn =
let (cb,rk) = lookup_constant_key kn env in
try key rk
with NotEvaluated ->
let pos =
match Cemitcodes.force cb.const_body_code with
| BCdefined(boxed,(code,pl,fv)) ->
let v = eval_to_patch env (code,pl,fv) in
if boxed then set_global_boxed kn v
else set_global v
| BCallias kn' -> slot_for_getglobal env kn'
| BCconstant -> set_global (val_of_constant kn) in
rk := Some pos;
pos
and slot_for_fv env fv =
match fv with
| FVnamed id ->
let nv = Pre_env.lookup_named_val id env in
begin
match !nv with
| VKvalue (v,_) -> v
| VKnone ->
let (_, b, _) = Sign.lookup_named id env.env_named_context in
let v,d =
match b with
| None -> (val_of_named id, Idset.empty)
| Some c -> (val_of_constr env c, Environ.global_vars_set (Environ.env_of_pre_env env) c)
in
nv := VKvalue (v,d); v
end
| FVrel i ->
let rv = Pre_env.lookup_rel_val i env in
begin
match !rv with
| VKvalue (v, _) -> v
| VKnone ->
let (_, b, _) = lookup_rel i env.env_rel_context in
let (v, d) =
match b with
| None -> (val_of_rel i, Idset.empty)
| Some c -> let renv = env_of_rel i env in
(val_of_constr renv c, Environ.global_vars_set (Environ.env_of_pre_env renv) c)
in
rv := VKvalue (v,d); v
end
and eval_to_patch env (buff,pl,fv) =
let patch = function
| Reloc_annot a, pos -> patch_int buff pos (slot_for_annot a)
| Reloc_const sc, pos -> patch_int buff pos (slot_for_str_cst sc)
| Reloc_getglobal kn, pos ->
patch_int buff pos (slot_for_getglobal env kn)
in
List.iter patch pl;
let vm_env = Array.map (slot_for_fv env) fv in
let tc = tcode_of_code buff (length buff) in
eval_tcode tc vm_env
and val_of_constr env c =
let (_,fun_code,_ as ccfv) =
try compile env c
with e -> print_string "can not compile \n";Format.print_flush();raise e in
eval_to_patch env (to_memory ccfv)
let set_transparent_const kn =
cst_opaque := Cpred.remove kn !cst_opaque;
List.iter (fun n -> (global_boxed()).(n) <- false)
(Hashtbl.find_all boxed_tbl kn)
let set_opaque_const kn =
cst_opaque := Cpred.add kn !cst_opaque;
List.iter (fun n -> (global_boxed()).(n) <- true)
(Hashtbl.find_all boxed_tbl kn)
|
