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(* SPDX-License-Identifier: AGPL-3.0-or-later *)
(* Copyright © 2021-2024 OCamlPro *)
(* Written by the Owi programmers *)
open Types
open Syntax
type type_check = text indice * text func_type
type opt_export =
{ name : string
; id : text indice
}
type opt_exports =
{ global : opt_export list
; mem : opt_export list
; table : opt_export list
; func : opt_export list
}
let curr_id (curr : int ref) (i : text indice option) =
match i with None -> Raw (pred !curr) | Some id -> id
type t =
{ id : string option
; typ : text type_def list
; function_type : text func_type list
(* Types comming from function declarations.
It contains potential duplication *)
; type_checks : type_check list
(* Types checks to perform after assignment.
Come from function declarations with type indicies *)
; global : (Text.global, binary global_type) Runtime.t Indexed.t list
; table : (binary table, binary table_type) Runtime.t Indexed.t list
; mem : (mem, limits) Runtime.t Indexed.t list
; func : (text func, text block_type) Runtime.t Indexed.t list
; elem : Text.elem Indexed.t list
; data : Text.data Indexed.t list
; exports : opt_exports
; start : text indice option
}
let imp (import : text import) (assigned_name, desc) : 'a Imported.t =
{ modul = import.modul; name = import.name; assigned_name; desc }
let empty_module id =
{ id
; typ = []
; function_type = []
; type_checks = []
; global = []
; table = []
; mem = []
; func = []
; elem = []
; data = []
; exports = { global = []; table = []; mem = []; func = [] }
; start = None
}
type curr =
{ global : int ref
; table : int ref
; mem : int ref
; func : int ref
; elem : int ref
; data : int ref
}
let init_curr () =
{ global = ref 0
; table = ref 0
; mem = ref 0
; func = ref 0
; elem = ref 0
; data = ref 0
}
let declare_func_type (fields : t) type_f =
match type_f with
| Bt_ind _ -> fields
| Bt_raw (id, typ) ->
let type_checks =
match id with
| None -> fields.type_checks
| Some id -> (id, typ) :: fields.type_checks
in
{ fields with function_type = typ :: fields.function_type; type_checks }
let add_global value (fields : t) (curr : curr) =
let index = !(curr.global) in
incr curr.global;
{ fields with global = Indexed.return index value :: fields.global }
let add_table value (fields : t) (curr : curr) =
let index = !(curr.table) in
incr curr.table;
{ fields with table = Indexed.return index value :: fields.table }
let add_mem value (fields : t) (curr : curr) =
let index = !(curr.mem) in
incr curr.mem;
{ fields with mem = Indexed.return index value :: fields.mem }
let rec extract_block_types expr =
let aux instr =
match instr with
| Block (_str_opt, bt, expr1) | Loop (_str_opt, bt, expr1) ->
Option.to_list bt @ extract_block_types expr1
| If_else (_str_opt, bt, expr1, expr2) ->
Option.to_list bt @ extract_block_types expr1 @ extract_block_types expr2
| Return_call_indirect (_, bt) | Return_call_ref bt | Call_indirect (_, bt)
->
[ bt ]
| _ -> []
in
List.concat_map aux expr
let add_func value (fields : t) (curr : curr) =
let fields =
match value with
| Runtime.Local func ->
let fields = declare_func_type fields func.type_f in
List.fold_left declare_func_type fields (extract_block_types func.body)
| Imported func -> declare_func_type fields func.desc
in
let index = !(curr.func) in
incr curr.func;
{ fields with func = Indexed.return index value :: fields.func }
let add_elem value (fields : t) (curr : curr) =
let index = !(curr.elem) in
incr curr.elem;
{ fields with elem = Indexed.return index value :: fields.elem }
let add_data value (fields : t) (curr : curr) =
let index = !(curr.data) in
incr curr.data;
{ fields with data = Indexed.return index value :: fields.data }
let add_field curr (fields : t) = function
| Text.MType typ ->
let typ = typ @ fields.typ in
Ok { fields with typ }
| MGlobal global -> ok @@ add_global (Local global) fields curr
| MImport ({ desc = Import_global (a, (mut, val_type)); _ } as import) ->
let+ val_type = Binary_types.convert_val_type None val_type in
let b = (mut, val_type) in
let imported = imp import (a, b) in
add_global (Imported imported) fields curr
| MExport { name; desc = Export_global id } ->
let id = curr_id curr.global id in
let exports =
{ fields.exports with global = { name; id } :: fields.exports.global }
in
Ok { fields with exports }
| MTable table ->
let id, table_type = table in
let+ table_type = Binary_types.convert_table_type None table_type in
let table = (id, table_type) in
add_table (Local table) fields curr
| MImport ({ desc = Import_table (id, table_type); _ } as import) ->
let+ table_type = Binary_types.convert_table_type None table_type in
let imported = imp import (id, table_type) in
add_table (Imported imported) fields curr
| MExport { name; desc = Export_table id } ->
let id = curr_id curr.table id in
let exports =
{ fields.exports with table = { name; id } :: fields.exports.table }
in
Ok { fields with exports }
| MMem mem -> ok @@ add_mem (Local mem) fields curr
| MImport ({ desc = Import_mem (id, limits); _ } as import) ->
let imported = imp import (id, limits) in
ok @@ add_mem (Imported imported) fields curr
| MExport { name; desc = Export_mem id } ->
let id = curr_id curr.mem id in
let exports =
{ fields.exports with mem = { name; id } :: fields.exports.mem }
in
Ok { fields with exports }
| MFunc func -> ok @@ add_func (Runtime.Local func) fields curr
| MImport ({ desc = Import_func (a, type_f); _ } as import) ->
let imported : text block_type Imported.t = imp import (a, type_f) in
ok @@ add_func (Imported imported) fields curr
| MExport { name; desc = Export_func id } ->
let id = curr_id curr.func id in
let exports =
{ fields.exports with func = { name; id } :: fields.exports.func }
in
Ok { fields with exports }
| MElem elem ->
let mode =
match elem.mode with
| (Text.Elem_passive | Elem_declarative) as mode -> mode
| Elem_active (id, expr) ->
let id = curr_id curr.table id in
Elem_active (Some id, expr)
in
ok @@ add_elem { elem with mode } fields curr
| MData data ->
let mode =
match data.mode with
| Data_passive -> Text.Data_passive
| Data_active (id, expr) ->
let id = curr_id curr.mem id in
Data_active (Some id, expr)
in
let data : Text.data = { id = data.id; init = data.init; mode } in
ok @@ add_data data fields curr
| MStart start -> Ok { fields with start = Some start }
let of_symbolic { Text.fields; id; _ } =
Log.debug0 "grouping ...@\n";
list_fold_left (add_field (init_curr ())) (empty_module id) fields