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interp.ml
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interp.ml
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(*
The Haxe Compiler
Copyright (C) 2005-2015 Haxe Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*)
open Common
open Nast
open Unix
open Type
(* ---------------------------------------------------------------------- *)
(* TYPES *)
type value =
| VNull
| VBool of bool
| VInt of int
| VFloat of float
| VString of string
| VObject of vobject
| VArray of value array
| VAbstract of vabstract
| VFunction of vfunction
| VClosure of value list * (value list -> value list -> value)
| VInt32 of int32
and vobject = {
mutable ofields : (int * value) array;
mutable oproto : vobject option;
}
and vabstract =
| ADeallocated of int ref
| AKind of vabstract
| AHash of (value, value) Hashtbl.t
| ARandom of Random.State.t ref
| ABuffer of Buffer.t
| APos of Ast.pos
| AFRead of (in_channel * bool ref)
| AFWrite of out_channel
| AReg of regexp
| AZipI of zlib
| AZipD of zlib
| AUtf8 of UTF8.Buf.buf
| ASocket of Unix.file_descr
| ATDecl of module_type
| AUnsafe of Obj.t
| ALazyType of (unit -> Type.t) ref
| ANekoAbstract of Extc.value
| ANekoBuffer of value
| ACacheRef of value
| AInt32Kind
| ATls of value ref
| AProcess of Process.process
and vfunction =
| Fun0 of (unit -> value)
| Fun1 of (value -> value)
| Fun2 of (value -> value -> value)
| Fun3 of (value -> value -> value -> value)
| Fun4 of (value -> value -> value -> value -> value)
| Fun5 of (value -> value -> value -> value -> value -> value)
| FunVar of (value list -> value)
and regexp = {
r : Str.regexp;
mutable r_string : string;
mutable r_groups : (int * int) option array;
}
and zlib = {
z : Extc.zstream;
mutable z_flush : Extc.zflush;
}
type cmp =
| CEq
| CSup
| CInf
| CUndef
type extern_api = {
pos : Ast.pos;
get_com : unit -> Common.context;
get_type : string -> Type.t option;
get_module : string -> Type.t list;
on_generate : (Type.t list -> unit) -> unit;
after_generate : (unit -> unit) -> unit;
on_type_not_found : (string -> value) -> unit;
parse_string : string -> Ast.pos -> bool -> Ast.expr;
type_expr : Ast.expr -> Type.texpr;
type_macro_expr : Ast.expr -> Type.texpr;
store_typed_expr : Type.texpr -> Ast.expr;
get_display : string -> string;
allow_package : string -> unit;
type_patch : string -> string -> bool -> string option -> unit;
meta_patch : string -> string -> string option -> bool -> unit;
set_js_generator : (value -> unit) -> unit;
get_local_type : unit -> t option;
get_expected_type : unit -> t option;
get_call_arguments : unit -> Ast.expr list option;
get_local_method : unit -> string;
get_local_imports : unit -> Ast.import list;
get_local_using : unit -> tclass list;
get_local_vars : unit -> (string, Type.tvar) PMap.t;
get_build_fields : unit -> value;
get_pattern_locals : Ast.expr -> Type.t -> (string,Type.tvar * Ast.pos) PMap.t;
define_type : value -> unit;
define_module : string -> value list -> ((string * Ast.pos) list * Ast.import_mode) list -> Ast.type_path list -> unit;
module_dependency : string -> string -> bool -> unit;
current_module : unit -> module_def;
mutable current_macro_module : unit -> module_def;
delayed_macro : int -> (unit -> (unit -> value));
use_cache : unit -> bool;
format_string : string -> Ast.pos -> Ast.expr;
cast_or_unify : Type.t -> texpr -> Ast.pos -> Type.texpr;
add_global_metadata : string -> string -> (bool * bool * bool) -> unit;
}
type callstack = {
cpos : pos;
cthis : value;
cstack : int;
cenv : value array;
}
type context = {
gen : Genneko.context;
types : (Type.path,int) Hashtbl.t;
prototypes : (string list, vobject) Hashtbl.t;
fields_cache : (int,string) Hashtbl.t;
mutable error : bool;
mutable error_proto : vobject;
mutable enums : (value * string) array array;
mutable do_call : value -> value -> value list -> pos -> value;
mutable do_string : value -> string;
mutable do_loadprim : value -> value -> value;
mutable do_compare : value -> value -> cmp;
mutable loader : value;
mutable exports : value;
(* runtime *)
mutable stack : value DynArray.t;
mutable callstack : callstack list;
mutable callsize : int;
mutable exc : pos list;
mutable vthis : value;
mutable venv : value array;
(* context *)
mutable curapi : extern_api;
mutable on_reused : (unit -> bool) list;
mutable is_reused : bool;
(* eval *)
mutable locals_map : (string, int) PMap.t;
mutable locals_count : int;
mutable locals_barrier : int;
mutable locals_env : string DynArray.t;
mutable globals : (string, value ref) PMap.t;
}
type access =
| AccThis
| AccLocal of int
| AccGlobal of value ref
| AccEnv of int
| AccField of (unit -> value) * string
| AccArray of (unit -> value) * (unit -> value)
exception Runtime of value
exception Builtin_error
exception Error of string * Ast.pos list
exception Abort
exception Continue
exception Break of value
exception Return of value
exception Invalid_expr
exception Sys_exit of int
(* ---------------------------------------------------------------------- *)
(* UTILS *)
let get_ctx_ref = ref (fun() -> assert false)
let encode_complex_type_ref = ref (fun t -> assert false)
let encode_type_ref = ref (fun t -> assert false)
let decode_type_ref = ref (fun t -> assert false)
let encode_expr_ref = ref (fun e -> assert false)
let decode_expr_ref = ref (fun e -> assert false)
let encode_texpr_ref = ref (fun e -> assert false)
let decode_texpr_ref = ref (fun e -> assert false)
let encode_clref_ref = ref (fun c -> assert false)
let enc_hash_ref = ref (fun h -> assert false)
let enc_array_ref = ref (fun l -> assert false)
let dec_array_ref = ref (fun v -> assert false)
let enc_string_ref = ref (fun s -> assert false)
let encode_tvar_ref = ref (fun _ -> assert false)
let decode_path_ref = ref (fun _ -> assert false)
let decode_import_ref = ref (fun _ -> assert false)
let encode_import_ref = ref (fun _ -> assert false)
let eval_expr_ref : (context -> texpr -> value option) ref = ref (fun _ _ -> assert false)
let get_ctx() = (!get_ctx_ref)()
let enc_array (l:value list) : value = (!enc_array_ref) l
let dec_array (l:value) : value list = (!dec_array_ref) l
let encode_complex_type (t:Ast.complex_type) : value = (!encode_complex_type_ref) t
let encode_type (t:Type.t) : value = (!encode_type_ref) t
let decode_type (v:value) : Type.t = (!decode_type_ref) v
let encode_expr (e:Ast.expr) : value = (!encode_expr_ref) e
let decode_expr (e:value) : Ast.expr = (!decode_expr_ref) e
let encode_texpr (e:Type.texpr) : value = (!encode_texpr_ref) e
let decode_texpr (v:value) : Type.texpr = (!decode_texpr_ref) v
let encode_clref (c:tclass) : value = (!encode_clref_ref) c
let enc_hash (h:('a,'b) Hashtbl.t) : value = (!enc_hash_ref) h
let enc_string (s:string) : value = (!enc_string_ref) s
let encode_tvar (v:tvar) : value = (!encode_tvar_ref) v
let decode_path (v:value) : Ast.type_path = (!decode_path_ref) v
let encode_import (i:Ast.import) : value = (!encode_import_ref) i
let decode_import (v:value) : Ast.import = (!decode_import_ref) v
let to_int f = Int32.of_float (mod_float f 2147483648.0)
let need_32_bits i = Int32.compare (Int32.logand (Int32.add i 0x40000000l) 0x80000000l) Int32.zero <> 0
let best_int i = if need_32_bits i then VInt32 i else VInt (Int32.to_int i)
let make_pos p =
let low = p.pline land 0xFFFFF in
{
Ast.pfile = p.psource;
Ast.pmin = low;
Ast.pmax = low + (p.pline lsr 20);
}
let warn ctx msg p =
(ctx.curapi.get_com()).Common.warning msg (make_pos p)
let rec pop ctx n =
if n > 0 then begin
DynArray.delete_last ctx.stack;
pop ctx (n - 1);
end
let pop_ret ctx f n =
let v = f() in
pop ctx n;
v
let push ctx v =
DynArray.add ctx.stack v
let hash f =
let h = ref 0 in
for i = 0 to String.length f - 1 do
h := !h * 223 + int_of_char (String.unsafe_get f i);
done;
if Sys.word_size = 64 then Int32.to_int (Int32.shift_right (Int32.shift_left (Int32.of_int !h) 1) 1) else !h
let constants =
let h = Hashtbl.create 0 in
List.iter (fun f -> Hashtbl.add h (hash f) f)
["done";"read";"write";"min";"max";"file";"args";"loadprim";"loadmodule";"__a";"__s";"h";
"tag";"index";"length";"message";"pack";"name";"params";"sub";"doc";"kind";"meta";"access";
"constraints";"opt";"type";"value";"ret";"expr";"field";"values";"get";"__string";"toString";
"$";"add";"remove";"has";"__t";"module";"isPrivate";"isPublic";"isExtern";"isInterface";"exclude";
"constructs";"names";"superClass";"interfaces";"fields";"statics";"constructor";"init";"t";
"gid";"uid";"atime";"mtime";"ctime";"dev";"ino";"nlink";"rdev";"size";"mode";"pos";"len";
"binops";"unops";"from";"to";"array";"op";"isPostfix";"impl";"resolve";
"id";"capture";"extra";"v";"ids";"vars";"en";"overrides";"status";"overloads";"path"];
h
let h_get = hash "__get" and h_set = hash "__set"
and h_add = hash "__add" and h_radd = hash "__radd"
and h_sub = hash "__sub" and h_rsub = hash "__rsub"
and h_mult = hash "__mult" and h_rmult = hash "__rmult"
and h_div = hash "__div" and h_rdiv = hash "__rdiv"
and h_mod = hash "__mod" and h_rmod = hash "__rmod"
and h_string = hash "__string" and h_compare = hash "__compare"
and h_constructs = hash "__constructs__" and h_a = hash "__a" and h_s = hash "__s"
and h_class = hash "__class__"
let exc v =
raise (Runtime v)
let hash_field ctx f =
let h = hash f in
(try
let f2 = Hashtbl.find ctx.fields_cache h in
if f <> f2 then exc (VString ("Field conflict between " ^ f ^ " and " ^ f2));
with Not_found ->
Hashtbl.add ctx.fields_cache h f);
h
let field_name ctx fid =
try
Hashtbl.find ctx.fields_cache fid
with Not_found ->
"???"
let obj hash fields =
let fields = Array.of_list (List.map (fun (k,v) -> hash k, v) fields) in
Array.sort (fun (k1,_) (k2,_) -> compare k1 k2) fields;
{
ofields = fields;
oproto = None;
}
let parse_int s =
let rec loop_hex i =
if i = String.length s then s else
match String.unsafe_get s i with
| '0'..'9' | 'a'..'f' | 'A'..'F' -> loop_hex (i + 1)
| _ -> String.sub s 0 i
in
let rec loop sp i =
if i = String.length s then (if sp = 0 then s else String.sub s sp (i - sp)) else
match String.unsafe_get s i with
| '0'..'9' -> loop sp (i + 1)
| ' ' when sp = i -> loop (sp + 1) (i + 1)
| '-' when i = 0 -> loop sp (i + 1)
| ('x' | 'X') when i = 1 && String.get s 0 = '0' -> loop_hex (i + 1)
| _ -> String.sub s sp (i - sp)
in
best_int (Int32.of_string (loop 0 0))
let parse_float s =
let rec loop sp i =
if i = String.length s then (if sp = 0 then s else String.sub s sp (i - sp)) else
match String.unsafe_get s i with
| ' ' when sp = i -> loop (sp + 1) (i + 1)
| '0'..'9' | '-' | '+' | 'e' | 'E' | '.' -> loop sp (i + 1)
| _ -> String.sub s sp (i - sp)
in
float_of_string (loop 0 0)
let find_sub str sub start =
let sublen = String.length sub in
if sublen = 0 then
0
else
let found = ref 0 in
let len = String.length str in
try
for i = start to len - sublen do
let j = ref 0 in
while String.unsafe_get str (i + !j) = String.unsafe_get sub !j do
incr j;
if !j = sublen then begin found := i; raise Exit; end;
done;
done;
raise Not_found
with
Exit -> !found
let nargs = function
| Fun0 _ -> 0
| Fun1 _ -> 1
| Fun2 _ -> 2
| Fun3 _ -> 3
| Fun4 _ -> 4
| Fun5 _ -> 5
| FunVar _ -> -1
let rec get_field o fid =
let rec loop min max =
if min < max then begin
let mid = (min + max) lsr 1 in
let cid, v = Array.unsafe_get o.ofields mid in
if cid < fid then
loop (mid + 1) max
else if cid > fid then
loop min mid
else
v
end else
match o.oproto with
| None -> VNull
| Some p -> get_field p fid
in
loop 0 (Array.length o.ofields)
let set_field o fid v =
let rec loop min max =
let mid = (min + max) lsr 1 in
if min < max then begin
let cid, _ = Array.unsafe_get o.ofields mid in
if cid < fid then
loop (mid + 1) max
else if cid > fid then
loop min mid
else
Array.unsafe_set o.ofields mid (cid,v)
end else
let fields = Array.make (Array.length o.ofields + 1) (fid,v) in
Array.blit o.ofields 0 fields 0 mid;
Array.blit o.ofields mid fields (mid + 1) (Array.length o.ofields - mid);
o.ofields <- fields
in
loop 0 (Array.length o.ofields)
let rec remove_field o fid =
let rec loop min max =
let mid = (min + max) lsr 1 in
if min < max then begin
let cid, v = Array.unsafe_get o.ofields mid in
if cid < fid then
loop (mid + 1) max
else if cid > fid then
loop min mid
else begin
let fields = Array.make (Array.length o.ofields - 1) (fid,VNull) in
Array.blit o.ofields 0 fields 0 mid;
Array.blit o.ofields (mid + 1) fields mid (Array.length o.ofields - mid - 1);
o.ofields <- fields;
true
end
end else
false
in
loop 0 (Array.length o.ofields)
let rec get_field_opt o fid =
let rec loop min max =
if min < max then begin
let mid = (min + max) lsr 1 in
let cid, v = Array.unsafe_get o.ofields mid in
if cid < fid then
loop (mid + 1) max
else if cid > fid then
loop min mid
else
Some v
end else
match o.oproto with
| None -> None
| Some p -> get_field_opt p fid
in
loop 0 (Array.length o.ofields)
let catch_errors ctx ?(final=(fun() -> ())) f =
let n = DynArray.length ctx.stack in
try
let v = f() in
final();
Some v
with Runtime v ->
pop ctx (DynArray.length ctx.stack - n);
final();
let rec loop o =
if o == ctx.error_proto then true else match o.oproto with None -> false | Some p -> loop p
in
(match v with
| VObject o when loop o ->
(match get_field o (hash "message"), get_field o (hash "pos") with
| VObject msg, VAbstract (APos pos) ->
(match get_field msg h_s with
| VString msg -> raise (Typecore.Error (Typecore.Custom msg,pos))
| _ -> ());
| _ -> ());
| _ -> ());
raise (Error (ctx.do_string v,List.map (fun s -> make_pos s.cpos) ctx.callstack))
| Abort ->
pop ctx (DynArray.length ctx.stack - n);
final();
None
let make_library fl =
let h = Hashtbl.create 0 in
List.iter (fun (n,f) -> Hashtbl.add h n f) fl;
h
(* ---------------------------------------------------------------------- *)
(* NEKO INTEROP *)
type primitive = (string * Extc.value * int)
type neko_context = {
load : string -> int -> primitive;
call : primitive -> value list -> value;
}
(* try to load dl in order *)
let rec dlopen dls =
let null = Extc.dlint 0 in
match dls with
| dl_path :: dls ->
let dl = Extc.dlopen dl_path in
if (Obj.magic dl) == null then
dlopen dls
else
Some dl;
| _ ->
None
let neko =
let is_win = Sys.os_type = "Win32" || Sys.os_type = "Cygwin" in
match dlopen (if is_win then
["neko.dll"]
else
(*
By defualt, the makefile of neko produces libneko.so,
however, the debian package creates libneko.so.0 without libneko.so...
The fedora rpm package creates libneko.so linked to libneko.so.1.
*)
["libneko.so"; "libneko.so.0"; "libneko.so.1"; "libneko.so.2"; "libneko.dylib"]
) with
| None ->
None
| Some(neko) ->
let null = Extc.dlint 0 in
let load v =
let s = Extc.dlsym neko v in
if (Obj.magic s) == null then failwith ("Could not load neko." ^ v);
s
in
ignore(Extc.dlcall0 (load "neko_global_init"));
let vm = Extc.dlcall1 (load "neko_vm_alloc") null in
ignore(Extc.dlcall1 (load "neko_vm_select") vm);
let loader = Extc.dlcall2 (load "neko_default_loader") null null in
let loadprim =
let l1 = load "neko_val_field" in
let l2 = Extc.dlcall1 (load "neko_val_id") (Extc.dlstring "loadprim") in
Extc.dlcall2 (l1) loader (l2) in
let callN = load "neko_val_callN" in
let callEx = load "neko_val_callEx" in
let copy_string = load "neko_copy_string" in
let alloc_root = load "neko_alloc_root" in
let free_root = load "neko_free_root" in
let alloc_root v =
let r = Extc.dlcall1 alloc_root (Extc.dlint 1) in
Extc.dlsetptr r v;
r
in
let free_root r =
ignore(Extc.dlcall1 free_root r)
in
ignore(alloc_root vm);
ignore(alloc_root loader);
ignore(alloc_root loadprim);
let alloc_string s =
Extc.dlcall2 copy_string (Extc.dlstring s) (Extc.dlint (String.length s))
in
let alloc_int (i:int) : Extc.value =
Obj.magic i
in
let loadprim n args =
let exc = ref null in
let vargs = [|alloc_string n;alloc_int args|] in
let p = Extc.dlcall5 callEx loader loadprim (Obj.magic vargs) (Extc.dlint 2) (Obj.magic exc) in
if !exc != null then failwith ("Failed to load " ^ n ^ ":" ^ string_of_int args);
ignore(alloc_root p);
(n,p,args)
in
let call_raw_prim (_,p,nargs) (args:Extc.value array) =
Extc.dlcall3 callN p (Obj.magic args) (Extc.dlint nargs)
in
(* a bit tricky since load "val_true" does not work as expected on Windows *)
let unser = try loadprim "std@unserialize" 2 with _ -> ("",null,0) in
(* did we fail to load std.ndll ? *)
if (match unser with ("",_,_) -> true | _ -> false) then None else
let val_true = call_raw_prim unser [|alloc_string "T";loader|] in
let val_false = call_raw_prim unser [|alloc_string "F";loader|] in
let val_null = call_raw_prim unser [|alloc_string "N";loader|] in
let is_64 = call_raw_prim (loadprim "std@sys_is64" 0) [||] == val_true in
let alloc_i32, is_v2 = (try load "neko_alloc_int32", true with _ -> Obj.magic 0, false) in
let alloc_i32 = if is_v2 then
(fun i -> Extc.dlcall1 alloc_i32 (Extc.dlint32 i))
else
(fun i -> alloc_int (Int32.to_int (if Int32.compare i Int32.zero < 0 then Int32.logand i 0x7FFFFFFFl else Int32.logor i 0x80000000l)))
in
let tag_bits = if is_v2 then 4 else 3 in
let tag_mask = (1 lsl tag_bits) - 1 in
let ptr_size = if is_64 then 8 else 4 in
let val_field v i = Extc.dladdr v ((i + 1) * ptr_size) in
let val_str v = Extc.dladdr v 4 in
let val_fun_env v = Extc.dladdr v (8 + ptr_size) in
(* alloc support *)
let alloc_function = load "neko_alloc_function" in
let alloc_array = load "neko_alloc_array" in
let alloc_float = load "neko_alloc_float" in
let alloc_object = load "neko_alloc_object" in
let alloc_field = load "neko_alloc_field" in
let alloc_abstract = load "neko_alloc_abstract" in
let val_gc = load "neko_val_gc" in
let val_field_name = load "neko_val_field_name" in
let val_iter_fields = load "neko_val_iter_fields" in
let gen_callback = Extc.dlcaml_callback 2 in
(* roots *)
let on_abstract_gc = Extc.dlcaml_callback 1 in
let root_index = ref 0 in
let roots = Hashtbl.create 0 in
Callback.register "dlcallb1" (fun a ->
let index : int = Obj.magic (Extc.dlptr (val_field a 1)) in
Hashtbl.remove roots index;
null
);
(* wrapping *)
let copy_string v =
let head = Extc.dltoint (Extc.dlptr v) in
let size = head asr tag_bits in
let s = String.create size in
Extc.dlmemcpy (Extc.dlstring s) (val_str v) size;
s
in
let buffers = ref [] in
let rec value_neko ?(obj=VNull) = function
| VNull -> val_null
| VBool b -> if b then val_true else val_false
| VInt i -> alloc_int i
| VAbstract (ANekoAbstract a) -> a
| VAbstract (ANekoBuffer (VString buf)) ->
let v = value_neko (VString buf) in
buffers := (buf,v) :: !buffers;
v
| VString s ->
let v = alloc_string s in (* make a copy *)
ignore(copy_string v);
v
| VObject o as obj ->
let vo = Extc.dlcall1 alloc_object null in
Array.iter (fun (id,v) ->
ignore(Extc.dlcall3 alloc_field vo (Extc.dlint id) (value_neko ~obj v))
) o.ofields;
vo
| VClosure _ ->
failwith "Closure not supported"
| VFunction f ->
let callb = Extc.dlcall3 alloc_function gen_callback (Extc.dlint (-1)) (Obj.magic "<callback>") in
let index = !root_index in
incr root_index;
Hashtbl.add roots index (f,obj);
let a = Extc.dlcall2 alloc_abstract null (Obj.magic index) in
if Extc.dlptr (val_field a 1) != Obj.magic index then assert false;
ignore(Extc.dlcall2 val_gc a on_abstract_gc);
Extc.dlsetptr (val_fun_env callb) a;
callb
| VArray a ->
let va = Extc.dlcall1 alloc_array (Extc.dlint (Array.length a)) in
Array.iteri (fun i v ->
Extc.dlsetptr (val_field va i) (value_neko v)
) a;
va
| VFloat f ->
Extc.dlcall1 alloc_float (Obj.magic f)
| VAbstract _ ->
failwith "Abstract not supported"
| VInt32 i ->
alloc_i32 i
in
let obj_r = ref [] in
let obj_fun = (fun v id -> obj_r := (v,id) :: !obj_r; val_null) in
let rec neko_value (v:Extc.value) =
if Obj.is_int (Obj.magic v) then
VInt (Obj.magic v)
else
let head = Extc.dltoint (Extc.dlptr v) in
match head land tag_mask with
| 0 -> VNull
| 2 -> VBool (v == val_true)
| 3 -> VString (copy_string v)
| 4 ->
ignore(Extc.dlcall3 val_iter_fields v (Extc.dlcallback 2) (Obj.magic obj_fun));
let r = !obj_r in
obj_r := [];
let ctx = get_ctx() in
let fields = List.rev_map (fun (v,id) ->
let iid = Extc.dltoint id in
if not (Hashtbl.mem ctx.fields_cache iid) then begin
let name = copy_string (Extc.dlcall1 val_field_name id) in
ignore(hash_field ctx name);
end;
iid, neko_value v
) r in
VObject { ofields = Array.of_list fields; oproto = None }
| 5 ->
VArray (Array.init (head asr tag_bits) (fun i -> neko_value (Extc.dlptr (val_field v i))))
| 7 ->
let r = alloc_root v in
let a = ANekoAbstract v in
Gc.finalise (fun _ -> free_root r) a;
VAbstract a
| t ->
failwith ("Unsupported Neko value tag " ^ string_of_int t)
in
Callback.register "dlcallb2" (fun args nargs ->
(* get back the VM env, which was set in value_neko *)
let env = Extc.dlptr (Extc.dladdr vm (2 * ptr_size)) in
(* extract the index stored in abstract data *)
let index : int = Obj.magic (Extc.dlptr (val_field env 1)) in
let f, obj = (try Hashtbl.find roots index with Not_found -> assert false) in
let nargs = Extc.dltoint nargs in
let rec loop i =
if i = nargs then [] else neko_value (Extc.dlptr (Extc.dladdr args (i * ptr_size))) :: loop (i + 1)
in
let v = (get_ctx()).do_call obj (VFunction f) (loop 0) { psource = "<callback>"; pline = 0; } in
value_neko v
);
let callprim (n,p,nargs) args =
let arr = Array.of_list (List.map value_neko args) in
let exc = ref null in
if Array.length arr <> nargs then failwith n;
let ret = Extc.dlcall5 callEx val_null p (Obj.magic arr) (Extc.dlint nargs) (Obj.magic exc) in
if !exc != null then raise (Runtime (neko_value !exc));
(match !buffers with
| [] -> ()
| l ->
buffers := [];
(* copy back data *)
List.iter (fun (buf,v) ->
Extc.dlmemcpy (Extc.dlstring buf) (val_str v) (String.length buf);
) l);
neko_value ret
in
Some {
load = loadprim;
call = callprim;
}
(* ---------------------------------------------------------------------- *)
(* BUILTINS *)
let builtins =
let p = { psource = "<builtin>"; pline = 0 } in
let error() =
raise Builtin_error
in
let vint = function
| VInt n -> n
| _ -> error()
in
let varray = function
| VArray a -> a
| _ -> error()
in
let vstring = function
| VString s -> s
| _ -> error()
in
let vobj = function
| VObject o -> o
| _ -> error()
in
let vfun = function
| VFunction f -> f
| VClosure (cl,f) -> FunVar (f cl)
| _ -> error()
in
let vhash = function
| VAbstract (AHash h) -> h
| _ -> error()
in
let build_stack sl =
let make p =
let p = make_pos p in
VArray [|VString p.Ast.pfile;VInt (Lexer.get_error_line p)|]
in
VArray (Array.of_list (List.map make sl))
in
let do_closure args args2 =
match args with
| f :: obj :: args ->
(get_ctx()).do_call obj f (args @ args2) p
| _ ->
assert false
in
let funcs = [
(* array *)
"array", FunVar (fun vl -> VArray (Array.of_list vl));
"amake", Fun1 (fun v -> VArray (Array.create (vint v) VNull));
"acopy", Fun1 (fun a -> VArray (Array.copy (varray a)));
"asize", Fun1 (fun a -> VInt (Array.length (varray a)));
"asub", Fun3 (fun a p l -> VArray (Array.sub (varray a) (vint p) (vint l)));
"ablit", Fun5 (fun dst dstp src p l ->
Array.blit (varray src) (vint p) (varray dst) (vint dstp) (vint l);
VNull
);
"aconcat", Fun1 (fun arr ->
let arr = Array.map varray (varray arr) in
VArray (Array.concat (Array.to_list arr))
);
(* string *)
"string", Fun1 (fun v -> VString ((get_ctx()).do_string v));
"smake", Fun1 (fun l -> VString (String.make (vint l) '\000'));
"ssize", Fun1 (fun s -> VInt (String.length (vstring s)));
"scopy", Fun1 (fun s -> VString (String.copy (vstring s)));
"ssub", Fun3 (fun s p l -> VString (String.sub (vstring s) (vint p) (vint l)));
"sget", Fun2 (fun s p ->
try VInt (int_of_char (String.get (vstring s) (vint p))) with Invalid_argument _ -> VNull
);
"sset", Fun3 (fun s p c ->
let c = char_of_int ((vint c) land 0xFF) in
try
String.set (vstring s) (vint p) c;
VInt (int_of_char c)
with Invalid_argument _ -> VNull);
"sblit", Fun5 (fun dst dstp src p l ->
String.blit (vstring src) (vint p) (vstring dst) (vint dstp) (vint l);
VNull
);
"sfind", Fun3 (fun src pos pat ->
try VInt (find_sub (vstring src) (vstring pat) (vint pos)) with Not_found -> VNull
);
(* object *)
"new", Fun1 (fun o ->
match o with
| VNull -> VObject { ofields = [||]; oproto = None }
| VObject o -> VObject { ofields = Array.copy o.ofields; oproto = o.oproto }
| _ -> error()
);
"objget", Fun2 (fun o f ->
match o with
| VObject o -> get_field o (vint f)
| _ -> VNull
);
"objset", Fun3 (fun o f v ->
match o with
| VObject o -> set_field o (vint f) v; v
| _ -> VNull
);
"objcall", Fun3 (fun o f pl ->
match o with
| VObject oo ->
(get_ctx()).do_call o (get_field oo (vint f)) (Array.to_list (varray pl)) p
| _ -> VNull
);
"objfield", Fun2 (fun o f ->
match o with
| VObject o ->
let p = o.oproto in
o.oproto <- None;
let v = get_field_opt o (vint f) in
o.oproto <- p;
VBool (v <> None)
| _ -> VBool false
);
"objremove", Fun2 (fun o f ->
VBool (remove_field (vobj o) (vint f))
);
"objfields", Fun1 (fun o ->
VArray (Array.map (fun (fid,_) -> VInt fid) (vobj o).ofields)
);
"hash", Fun1 (fun v -> VInt (hash_field (get_ctx()) (vstring v)));
"fasthash", Fun1 (fun v -> VInt (hash (vstring v)));
"field", Fun1 (fun v ->
try VString (Hashtbl.find (get_ctx()).fields_cache (vint v)) with Not_found -> VNull
);
"objsetproto", Fun2 (fun o p ->
let o = vobj o in
(match p with
| VNull -> o.oproto <- None
| VObject p -> o.oproto <- Some p
| _ -> error());
VNull;
);
"objgetproto", Fun1 (fun o ->
match (vobj o).oproto with
| None -> VNull
| Some p -> VObject p
);
(* function *)
"nargs", Fun1 (fun f ->
VInt (nargs (vfun f))
);
"call", Fun3 (fun f o args ->
(get_ctx()).do_call o f (Array.to_list (varray args)) p
);
"closure", FunVar (fun vl ->
match vl with
| VFunction f :: _ :: _ ->
VClosure (vl, do_closure)
| _ -> exc (VString "Can't create closure : value is not a function")
);
"apply", FunVar (fun vl ->
match vl with
| f :: args ->
let f = vfun f in
VFunction (FunVar (fun args2 -> (get_ctx()).do_call VNull (VFunction f) (args @ args2) p))
| _ -> exc (VString "Invalid closure arguments number")
);
"varargs", Fun1 (fun f ->
match f with
| VFunction (FunVar _) | VFunction (Fun1 _) | VClosure _ ->
VFunction (FunVar (fun vl -> (get_ctx()).do_call VNull f [VArray (Array.of_list vl)] p))
| _ ->
error()
);
(* numbers *)
(* skip iadd, isub, idiv, imult *)
"isnan", Fun1 (fun f ->
match f with
| VFloat f -> VBool (f <> f)
| _ -> VBool false
);
"isinfinite", Fun1 (fun f ->
match f with
| VFloat f -> VBool (f = infinity || f = neg_infinity)
| _ -> VBool false
);
"int", Fun1 (fun v ->
match v with
| VInt _ | VInt32 _ -> v
| VFloat f -> best_int (to_int f)
| VString s -> (try parse_int s with _ -> VNull)
| _ -> VNull
);
"float", Fun1 (fun v ->
match v with
| VInt i -> VFloat (float_of_int i)
| VInt32 i -> VFloat (Int32.to_float i)
| VFloat _ -> v
| VString s -> (try VFloat (parse_float s) with _ -> VNull)
| _ -> VNull
);
(* abstract *)
"getkind", Fun1 (fun v ->
match v with
| VAbstract a -> VAbstract (AKind a)
| VInt32 _ -> VAbstract (AKind AInt32Kind)
| _ -> error()
);
"iskind", Fun2 (fun v k ->
match v, k with
| VAbstract a, VAbstract (AKind k) -> VBool (Obj.tag (Obj.repr a) = Obj.tag (Obj.repr k))
| VInt32 _, VAbstract (AKind AInt32Kind) -> VBool true
| _, VAbstract (AKind _) -> VBool false
| _ -> error()
);
(* hash *)
"hkey", Fun1 (fun v -> VInt (Hashtbl.hash v));
"hnew", Fun1 (fun v ->
VAbstract (AHash (match v with
| VNull -> Hashtbl.create 0
| VInt n -> Hashtbl.create n
| _ -> error()))
);
"hresize", Fun1 (fun v -> VNull);
"hget", Fun3 (fun h k cmp ->
if cmp <> VNull then assert false;
(try Hashtbl.find (vhash h) k with Not_found -> VNull)
);
"hmem", Fun3 (fun h k cmp ->
if cmp <> VNull then assert false;
VBool (Hashtbl.mem (vhash h) k)
);
"hremove", Fun3 (fun h k cmp ->
if cmp <> VNull then assert false;
let h = vhash h in
let old = Hashtbl.mem h k in
if old then Hashtbl.remove h k;
VBool old
);
"hset", Fun4 (fun h k v cmp ->
if cmp <> VNull then assert false;
let h = vhash h in
let old = Hashtbl.mem h k in
Hashtbl.replace h k v;
VBool (not old);
);
"hadd", Fun4 (fun h k v cmp ->
if cmp <> VNull then assert false;
let h = vhash h in
let old = Hashtbl.mem h k in
Hashtbl.add h k v;
VBool (not old);
);
"hiter", Fun2 (fun h f -> Hashtbl.iter (fun k v -> ignore ((get_ctx()).do_call VNull f [k;v] p)) (vhash h); VNull);
"hcount", Fun1 (fun h -> VInt (Hashtbl.length (vhash h)));
"hsize", Fun1 (fun h -> VInt (Hashtbl.length (vhash h)));
(* misc *)
"print", FunVar (fun vl -> List.iter (fun v ->