Source file cmodule.ml
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open Alarms
open Soundness
open Mopsa
open Sig.Abstraction.Domain
open Universal.Ast
open C.Ast
open C.Common.Points_to
open Python.Ast
open Python.Addr
open Prelude
module AddrSet=
Framework.Lattices.Powerset.Make(struct type t = addr
let compare = compare_addr
let print = unformat pp_addr end)
let rec eval_offset man flow e =
Visitor.map_expr (fun e -> match ekind e with
| E_var _ ->
let itv = ask_and_reduce man.ask (Universal.Numeric.Common.mk_int_interval_query e) flow in
if ItvUtils.IntItv.is_singleton (Bot.bot_to_exn itv) then
let (a, b) = Bot.bot_to_exn itv in
match a with
| Finite a ->
Keep {e with ekind = E_constant (C_int a)}
| _ -> assert false
else
assert false
| E_constant _ -> Keep e
| E_binop (O_plus, e1, e2) ->
let e1 = eval_offset man flow e1 in
let e2 = eval_offset man flow e2 in
begin match ekind e1, ekind e2 with
| E_constant (C_int z1), E_constant (C_int z2) -> Keep {e with ekind = E_constant (C_int (Z.add z1 z2)) }
| _, E_constant (C_int z) | E_constant (C_int z), _ when Z.equal z Z.zero -> Keep e1
| _ -> Keep {e with ekind = E_binop(O_plus, e1, e2)}
end
| E_binop (O_mult, e1, e2) ->
let e1 = eval_offset man flow e1 in
let e2 = eval_offset man flow e2 in
begin match ekind e1, ekind e2 with
| E_constant (C_int z1), E_constant (C_int z2) -> Keep {e with ekind = E_constant (C_int (Z.mul z1 z2)) }
| _, E_constant (C_int z) | E_constant (C_int z), _ when Z.equal z Z.zero -> Keep e2
| _, E_constant (C_int z) | E_constant (C_int z), _ when Z.equal z Z.one -> Keep e1
| _ -> Keep {e with ekind = E_binop(O_mult, e1, e2)}
end
| _ -> VisitParts e
) (fun stmt -> Keep stmt) e
module NoAddrBase =
struct
type t =
| Fun of C.Ast.c_fundec
| Varbase of var * expr
let compare p1 p2 =
match p1, p2 with
| Fun f1, Fun f2 ->
compare f1.C.Ast.c_func_unique_name f2.C.Ast.c_func_unique_name
| Varbase (v1, o1), Varbase (v2, o2) ->
Compare.pair compare_var compare_expr (v1, o1) (v2, o2)
| _, _ -> Stdlib.compare p1 p2
let print =
unformat (fun fmt a -> match a with
| Fun f -> Format.fprintf fmt "%s" f.c_func_org_name
| Varbase (v, o) -> Format.fprintf fmt "(%a,%a)" pp_var v pp_expr o)
end
module OtherMap =
Framework.Lattices.Partial_inversible_map.Make(NoAddrBase)(Addr)
module EquivBaseAddrs =
struct
include Framework.Lattices.Pair.Make(AddrSet)(OtherMap)
let empty = (AddrSet.empty, OtherMap.empty)
let is_bottom (a, o) = AddrSet.is_bottom a && OtherMap.is_bottom o
let find_opt_from_c pt man flow =
man.get T_cur flow >>$ fun (curs, curm) flow ->
match pt with
| P_block ({base_kind = Addr a}, _, _) ->
if AddrSet.mem a curs then Cases.return (Some a) flow
else Cases.return None flow
| P_block ({base_kind = Var v}, offset, _) ->
let r = Top.detop (OtherMap.find (Varbase (v, eval_offset man flow offset)) curm) in
debug "searching for %a %a in:@.%a" pp_var v pp_expr offset (format OtherMap.print) curm;
if OtherMap.ValueSet.cardinal r = 1 then Cases.return (Some (OtherMap.ValueSet.choose r)) flow
else if OtherMap.ValueSet.cardinal r = 0 then Cases.return None flow
else assert false
| P_fun f ->
let r = Top.detop (OtherMap.find (Fun f) curm) in
if OtherMap.ValueSet.cardinal r = 1 then Cases.return (Some (OtherMap.ValueSet.choose r)) flow
else if OtherMap.ValueSet.cardinal r = 0 then Cases.return None flow
else assert false
| _ -> assert false
let find_opt_from_py addr range man flow =
man.get T_cur flow >>$ fun (curs, curm) flow ->
if AddrSet.mem addr curs then
Cases.return (Some (mk_c_points_to_bloc (C.Common.Base.mk_addr_base addr) (mk_zero range) None)) flow
else
let r = Top.detop @@ OtherMap.find_inverse addr curm in
if OtherMap.KeySet.cardinal r = 1 then
match OtherMap.KeySet.choose r with
| Fun f ->
Cases.return (Some (mk_c_points_to_fun f)) flow
| Varbase (v, offset) ->
Cases.return (Some (mk_c_points_to_bloc (C.Common.Base.mk_var_base v) offset None)) flow
else if OtherMap.KeySet.cardinal r > 1 then assert false
else Cases.return None flow
let add_addr addr man flow =
get_env T_cur man flow >>$ fun (curs, curm) flow ->
let curs = AddrSet.add addr curs in
set_env T_cur (curs, curm) man flow
let add_c_py_equiv pt addr man flow =
get_env T_cur man flow >>$ fun (curs, curm) flow ->
let noab : NoAddrBase.t = match pt with
| P_fun f -> Fun f
| P_block ({base_kind = Var v}, offset, _) -> Varbase (v, eval_offset man flow offset)
| _ -> assert false in
let curm = OtherMap.set noab (Nt (OtherMap.ValueSet.singleton addr)) curm in
set_env T_cur (curs, curm) man flow
let rename_addr src dst man flow =
man.get T_cur flow >>$ fun (curs, curm) flow ->
let curs, to_rename = if AddrSet.mem src curs then AddrSet.add dst (AddrSet.remove src curs), true
else curs, false in
let curm = OtherMap.rename_inverse src dst curm in
set_env T_cur (curs, curm) man flow >>% Cases.return to_rename
let widen ctx = join
end
module Domain =
struct
include EquivBaseAddrs
include Framework.Core.Id.GenDomainId(
struct
type nonrec t = t
let name = "cpython.cmodule"
end)
let checks = []
let init _ man flow =
List.iter (fun a -> Hashtbl.add C.Common.Builtins.builtin_functions a ()) builtin_functions;
set_env T_cur EquivBaseAddrs.empty man flow >>%? fun flow ->
set_c_target_info !C.Frontend.target_info flow |>
Post.return |>
Option.some
let materialize_builtin_val_addr addr man range flow =
if List.exists (fun a -> compare_addr addr (OptionExt.none_to_exn !a) = 0) [Python.Types.Addr_env.addr_integers; Python.Types.Addr_env.addr_float;
Python.Types.Addr_env.addr_bytes; Python.Types.Addr_env.addr_strings
] then
man.eval (mk_alloc_addr (akind addr) range) flow >>$ fun eaddr flow ->
let strong = Addr.from_expr eaddr in
let () = warn "changing %a into strong integer addr %a to improve C precision" pp_addr addr pp_addr strong in
man.exec (mk_add eaddr range) flow >>% fun flow ->
Cases.singleton strong flow
else
Cases.singleton addr flow
let mk_avalue_from_pyaddr addr typ range =
mk_var (mk_addr_attr addr "value" typ) range
let safe_get_name_of expr man flow =
let r = resolve_pointer expr man flow >>$
(fun points_to flow ->
match points_to with
| P_block({base_kind = String (s, _, _)}, offset, _) ->
Cases.singleton (Some (Top.Nt s)) flow
| P_null ->
Cases.singleton None flow
| P_top ->
Cases.singleton (Some Top.TOP) flow
| _ ->
warn "safe_get_name_of points_to %a, abstracted as T" pp_points_to points_to;
Cases.singleton (Some Top.TOP) flow
) in
r
let bind_in_python binder_addr obj_name obj_addr range man flow =
(if compare_addr_kind (akind obj_addr) (akind @@ OptionExt.none_to_exn @@ !Python.Types.Addr_env.addr_integers) = 0 then
man.eval (mk_avalue_from_pyaddr obj_addr T_int range) flow >>$
fun int_value flow ->
Cases.return (Some int_value) flow
else if compare_addr_kind (akind obj_addr) (akind @@ OptionExt.none_to_exn @@ !Python.Types.Addr_env.addr_float) = 0 then
man.eval (mk_avalue_from_pyaddr obj_addr (T_float F_DOUBLE) range) flow >>$
fun float_value flow ->
Cases.return (Some float_value) flow
else if compare_addr_kind (akind obj_addr) (akind @@ OptionExt.none_to_exn @@ !Python.Types.Addr_env.addr_strings) = 0 then
man.eval (mk_avalue_from_pyaddr obj_addr T_string range) flow >>$
fun str_value flow ->
Cases.return (Some str_value) flow
else
Cases.return None flow) >>$
fun obj_oe flow ->
man.exec
(mk_assign
(Python.Ast.mk_py_attr
(Python.Ast.mk_py_object (binder_addr, None) range)
obj_name ~etyp:(Python.Ast.T_py None) range)
(Python.Ast.mk_py_object (obj_addr, obj_oe) range)
range) flow
let mk_base_expr base range =
let open C.Common.Base in
match base.base_kind with
| Var v -> mk_var v range
| Addr a -> mk_addr a range
| _ -> assert false
let mk_base_offset_pointer base offset typ range =
let base_addr = mk_c_cast (mk_c_address_of (mk_base_expr base range) range) (T_c_pointer s8) range in
let elem_addr = add base_addr offset ~typ:(T_c_pointer s8) range in
mk_c_cast elem_addr (T_c_pointer typ) range
let alloc_py_addr man addr ?(mode=STRONG) range flow =
man.eval (mk_alloc_addr ~mode:mode addr range) flow >>$
fun py_eaddr flow ->
man.exec ~route:(Semantic "Python") (mk_add py_eaddr range) flow >>%
Eval.singleton py_eaddr
let new_method_from_def binder_addr methd_kind methd man flow =
let range = erange methd in
safe_get_name_of (mk_c_member_access_by_name methd "ml_name" range) man flow >>$
fun omethd_name flow ->
match omethd_name with
| None -> Cases.singleton false flow
| Some methd_name ->
let methd_name = Top.top_to_exn methd_name in
resolve_pointer (mk_c_member_access_by_name methd "ml_meth" range) man flow >>$
fun methd_function flow ->
let methd_fundec = match methd_function with
| P_fun f -> f
| _ -> assert false in
EquivBaseAddrs.find_opt_from_c methd_function man flow >>$ fun oa_methd_function flow ->
(if oa_methd_function <> None then
Eval.singleton (mk_addr (OptionExt.none_to_exn oa_methd_function) range) flow
else
man.eval ~translate:"Universal" (mk_c_member_access_by_name methd "ml_flags" range) flow >>$ fun methd_flags flow ->
let oflags =
match Bot.bot_to_exn @@ ask_and_reduce man.ask (Universal.Numeric.Common.mk_int_interval_query methd_flags) flow with
| Finite l, Finite r when Z.compare l r = 0 -> Some (Z.to_int l)
| _ -> assert false in
alloc_py_addr man (Python.Addr.A_py_c_function (methd_fundec.c_func_org_name, methd_fundec.c_func_uid, methd_kind, oflags, (binder_addr, None))) range flow) >>$
fun methd_eaddr flow ->
let methd_addr = Addr.from_expr methd_eaddr in
EquivBaseAddrs.add_c_py_equiv methd_function methd_addr man flow >>% fun flow ->
bind_in_python binder_addr methd_name methd_addr range man flow >>%
Cases.singleton true
let rec fold_until_null func c flow =
func c flow >>$
(fun continue flow ->
if continue then fold_until_null func (c+1) flow
else Post.return flow
)
let add_pymethoddef field_name binder_addr methd_descr expr man flow =
let range = erange expr in
let add_method pos flow =
man.eval (mk_c_subscript_access
(mk_c_arrow_access_by_name expr field_name range)
(mk_int pos range)
range) flow >>$
(fun methd flow ->
new_method_from_def binder_addr methd_descr methd man flow)
in
assume
(ne
(mk_c_arrow_access_by_name expr field_name range)
(mk_c_null range)
~etyp:T_bool range) man flow
~fthen:(fun flow ->
fold_until_null add_method 0 flow)
~felse:(fun flow ->
debug "add_pymethoddef %s %a: NULL found, nothing to do" field_name pp_expr expr;
Post.return flow)
let add_pymemberdef binder_addr expr man flow =
let range = erange expr in
let add_member pos flow =
let range = tag_range range "@%d" pos in
debug "add member %a" pp_range range;
man.eval (mk_c_subscript_access
(mk_c_arrow_access_by_name expr "tp_members" range)
(mk_int pos range)
range) flow >>$
(fun member flow ->
safe_get_name_of (mk_c_member_access_by_name member "name" range) man flow >>$
fun omember_name flow ->
match omember_name with
| None -> Cases.singleton false flow
| Some member_name ->
let member_name = Top.top_to_exn member_name in
debug "name is %s" member_name;
resolve_pointer (mk_c_address_of member range) man flow >>$
fun member_points_to flow ->
debug "points_to %a" pp_points_to member_points_to;
alloc_py_addr man (Python.Addr.A_py_instance (fst @@ Python.Addr.find_builtin "member_descriptor")) range flow >>$
fun member_descr flow ->
let member_descr = Addr.from_expr member_descr in
add_c_py_equiv member_points_to member_descr man flow >>% fun flow ->
man.exec (mk_assign (mk_py_attr (mk_py_object (member_descr, None) range) "__name__" range) {(mk_string member_name range) with etyp = T_py None} range) flow >>%
bind_in_python binder_addr member_name member_descr range man >>%
Cases.singleton true
)
in
assume
(ne
(mk_c_arrow_access_by_name expr "tp_members" range)
(mk_c_null range)
~etyp:T_bool range) man flow
~fthen:(fun flow ->
fold_until_null add_member 0 flow)
~felse:(fun flow ->
debug "add_pymemberdef %a tp_members: NULL found, nothing to do" pp_expr expr;
Post.return flow)
let new_module_from_def expr man flow =
let range = erange expr in
safe_get_name_of (mk_c_arrow_access_by_name expr "m_name" range) man flow >>$
(fun omodule_name flow ->
match omodule_name with
| None -> assert false
| Some module_name ->
let module_name = Top.top_to_exn module_name in
alloc_py_addr man (Python.Addr.A_py_c_module module_name) range flow >>$
fun module_addr flow ->
let m_addr = Addr.from_expr module_addr in
EquivBaseAddrs.add_addr m_addr man flow >>% fun flow ->
add_pymethoddef "m_methods" m_addr Builtin_function_or_method expr man flow
>>% Eval.singleton module_addr
)
let resolve_c_pointer_into_addr expr man flow =
resolve_pointer expr man flow >>$
(fun points_to flow ->
debug "[resolve_c_pointer %a:%a] searching for %a" pp_expr expr pp_typ (etyp expr) pp_points_to points_to;
if points_to = P_null then let () = debug "that's NULL" in Cases.singleton None flow
else if points_to = P_top then Cases.singleton (Some Top.TOP) flow
else
EquivBaseAddrs.find_opt_from_c points_to man flow >>$ fun oa flow ->
debug "got %a" (OptionExt.print pp_addr) oa;
if oa <> None then
Cases.singleton (OptionExt.return (Top.Nt (OptionExt.none_to_exn oa))) flow
else
match points_to with
| P_block ({base_kind = Var v}, _, _) ->
begin match remove_typedef_qual @@ vtyp v with
| T_c_record {c_record_kind = C_struct; c_record_org_name} when c_record_org_name = "_typeobject" ->
let range = erange expr in
raise_cpython_class_not_ready (mk_var v range) range man flow |>
Cases.empty
| _ -> assert false
end
| _ ->
if man.lattice.is_bottom (Flow.get T_cur man.lattice flow) then
Cases.empty flow
else
panic_at expr.erange "resolve_c_pointer_into_addr %a" pp_points_to points_to;
)
let c_to_python_boundary
?(safe_check = None)
?(on_null = fun flow -> debug "null!"; assert false)
?(on_top = fun flow -> debug "top!"; assert false)
expr man flow range =
resolve_c_pointer_into_addr expr man flow >>$
fun oaddr flow ->
match oaddr with
| Some (Nt addr) ->
debug "c_to_python boundary %a" pp_addr addr;
begin
let flow = match safe_check with
| None -> flow
| Some c -> Flow.add_safe_check c range flow in
match akind addr with
| A_py_instance {addr_kind = A_py_class (C_builtin ("int" | "bool"), _)} ->
man.eval (mk_avalue_from_pyaddr addr T_int range) flow >>$
fun int_value flow ->
Eval.singleton (mk_py_object (addr, Some int_value) range) flow
| A_py_instance {addr_kind = A_py_class (C_builtin "float", _)} ->
man.eval (mk_avalue_from_pyaddr addr (T_float F_DOUBLE) range) flow >>$
fun float_value flow ->
Eval.singleton (mk_py_object (addr, Some float_value) range) flow
| A_py_instance {addr_kind = A_py_class (C_builtin "bytes", _)}
| A_py_instance {addr_kind = A_py_class (C_builtin "str", _)} ->
man.eval (mk_avalue_from_pyaddr addr T_string range) flow >>$
fun str_value flow ->
Eval.singleton (mk_py_object (addr, Some str_value) range) flow
| _ -> Eval.singleton (mk_py_object (addr, None) range) flow
end
| Some TOP -> on_top flow
| None -> on_null flow
let bind_function_in name expr cls_addr function_kind man flow =
let range = erange expr in
resolve_pointer expr man flow >>$
fun func flow ->
Post.return
(match func with
| P_fun fundec ->
alloc_py_addr man (Python.Addr.A_py_c_function (fundec.c_func_org_name, fundec.c_func_uid, function_kind, None, (cls_addr, None))) range flow >>$
(fun fun_eaddr flow ->
let fun_addr = Addr.from_expr fun_eaddr in
EquivBaseAddrs.add_c_py_equiv func fun_addr man flow >>% fun flow ->
bind_in_python cls_addr name fun_addr range man flow)
|> post_to_flow man
| _ -> flow)
let search_c_globals_for flow s =
let c_prog_globals = (get_c_program flow).c_globals in
fst @@ List.find
(fun (x, _) ->
match vkind x with
| V_cvar v -> v.cvar_orig_name = s
| _ -> false) c_prog_globals
let check_consistent_null function_name man flow range =
let exc = search_c_globals_for flow "exc" in
man.eval (mk_var exc range) flow >>$
fun exc flow ->
resolve_pointer exc man flow >>$
fun exc_pt flow ->
resolve_c_pointer_into_addr (mk_c_arrow_access_by_name exc "exc_state" range) man flow >>$
fun oexc_addr flow ->
match oexc_addr with
| Some (Nt exc_addr) ->
let flow = Flow.add_safe_check Python.Alarms.CHK_PY_SYSTEMERROR range flow in
safe_get_name_of (mk_c_arrow_access_by_name exc "exc_msg" range) man flow >>$
fun exc_msg flow ->
debug "%s: exc_addr: %a, exc_msg: %a" function_name pp_addr exc_addr (OptionExt.print (Top.top_fprint Format.pp_print_string)) exc_msg;
let args = match exc_msg with
| None -> []
| Some (Nt s) -> [{(Universal.Ast.mk_string s range) with etyp=(T_py None)}]
| Some TOP -> [Python.Ast.mk_py_top T_string range]
in
let exc_cs = match exc_pt with
| P_block ({base_kind = Addr a}, _, _) ->
ask_and_reduce man.ask (Callstack_tracking.Q_cpython_attached_callstack a) flow
| _ -> assert false in
let old_cs = Flow.get_callstack flow in
let flow = Flow.set_callstack exc_cs flow in
man.exec (mk_c_call_stmt (C.Ast.find_c_fundec_by_name "PyErr_Clear" flow) [] range) flow >>% fun flow ->
man.exec (Python.Ast.mk_raise
(Python.Ast.mk_py_call
(Python.Ast.mk_py_object (exc_addr, None) range)
args range)
range) flow >>% fun flow ->
let flow = Flow.set_callstack old_cs flow in
Eval.empty flow
| Some TOP -> assert false
| None ->
debug "%s: NULL found" function_name;
man.exec (mk_c_call_stmt (C.Ast.find_c_fundec_by_name "PyErr_Clear" flow) [] range) flow >>% fun flow ->
man.exec (Python.Ast.mk_raise
(Python.Ast.mk_py_call
(Python.Ast.mk_py_object (fst @@ find_builtin "SystemError", None) range)
[{(Universal.Ast.mk_string (Format.asprintf "%s returned NULL without setting an error" function_name) range) with etyp=(T_py None)}] range)
range) flow >>% Eval.empty
let is_py_addr addr =
match akind addr with
| Python.Objects.Py_list.A_py_list
| Python.Objects.Py_list.A_py_iterator _
| Python.Objects.Py_set.A_py_set
| Python.Objects.Tuple.A_py_tuple _
| Python.Objects.Dict.A_py_dict
| A_py_instance _
| A_py_class _
| A_py_c_class _
| A_py_c_function _
| A_py_c_module _
| A_py_function _
| A_py_method _
| A_py_module _ -> true
| _ -> false
let points_to_to_c_expr pt typ range =
match pt with
| P_block ({base_kind = Var v} as base, offset, _) ->
mk_base_offset_pointer base offset typ range
| P_block ({base_kind = Addr a}, _, _) ->
mk_addr ~etyp:typ a range
| _ -> assert false
let py_addr_to_c_expr addr typ range man flow =
EquivBaseAddrs.find_opt_from_py addr range man flow >>$ fun oa flow ->
Cases.return (points_to_to_c_expr (OptionExt.none_to_exn oa) typ range) flow
let rec try_init flow man range =
let addr_type = fst @@ Python.Addr.find_builtin "type" in
EquivBaseAddrs.find_opt_from_py addr_type range man flow >>$ fun oa flow ->
if oa = None then
let add_class_equiv c_var_name py_bltin_name flow =
let py_addr = fst @@ Python.Addr.find_builtin py_bltin_name in
let c_var = search_c_globals_for flow c_var_name in
debug "cls_equiv c_var %a %a" pp_var c_var pp_typ c_var.vtyp;
EquivBaseAddrs.add_c_py_equiv
(mk_c_points_to_bloc (C.Common.Base.mk_var_base c_var) (mk_zero (Location.mk_program_range [])) None)
py_addr
man flow
in
let add_class_equivs descr flow =
List.fold_left (fun post (c, py) ->
post >>% add_class_equiv c py) (Post.return flow) descr in
let add_exc_equivs descr post =
List.fold_left (fun post c ->
let py = String.sub c 6 (String.length c - 6) in
let py_addr = fst @@ Python.Addr.find_builtin py in
post >>% fun flow -> python_to_c_boundary py_addr None None range man flow >>$ fun _ flow -> Post.return flow
) post descr
in
let post =
let none_addr = OptionExt.none_to_exn !Python.Types.Addr_env.addr_none in
let true_addr = OptionExt.none_to_exn !Python.Types.Addr_env.addr_true in
let false_addr = OptionExt.none_to_exn !Python.Types.Addr_env.addr_false in
let ni_addr = OptionExt.none_to_exn !Python.Types.Addr_env.addr_notimplemented in
let none_var = search_c_globals_for flow "_Py_NoneStruct" in
let ni_var = search_c_globals_for flow "_Py_NotImplementedStruct" in
let true_var = search_c_globals_for flow "_Py_TrueStruct" in
let false_var = search_c_globals_for flow "_Py_FalseStruct" in
let flow = post_to_flow man @@ man.exec (mk_assign (mk_avalue_from_pyaddr true_addr T_int range) (mk_one range) range) flow in
let flow = post_to_flow man @@ man.exec (mk_assign (mk_avalue_from_pyaddr false_addr T_int range) (mk_zero range) range) flow in
EquivBaseAddrs.add_c_py_equiv
(mk_c_points_to_bloc (C.Common.Base.mk_var_base none_var) (mk_zero (Location.mk_program_range [])) None)
none_addr
man flow
>>% fun flow ->
EquivBaseAddrs.add_c_py_equiv
(mk_c_points_to_bloc (C.Common.Base.mk_var_base ni_var) (mk_zero (Location.mk_program_range [])) None)
ni_addr
man flow
>>% fun flow ->
EquivBaseAddrs.add_c_py_equiv
(mk_c_points_to_bloc (C.Common.Base.mk_var_base true_var) (mk_zero (Location.mk_program_range [])) None)
true_addr
man flow
>>% fun flow ->
EquivBaseAddrs.add_c_py_equiv
(mk_c_points_to_bloc (C.Common.Base.mk_var_base false_var) (mk_zero (Location.mk_program_range [])) None)
false_addr
man flow
in
let post =
post >>% add_class_equivs
[
("PyType_Type", "type");
("PyBaseObject_Type", "object");
("PyLong_Type", "int");
("PyFloat_Type", "float");
("PyUnicode_Type", "str");
("PyBytes_Type", "bytes");
("PyList_Type", "list");
("PyListIter_Type", "list_iterator");
("PySlice_Type", "slice");
("PySet_Type", "set");
("PySetIter_Type", "set_iterator");
("PyRange_Type", "range");
("PyRangeIter_Type", "range_iterator");
("PyTuple_Type", "tuple");
("PyTupleIter_Type", "tuple_iterator");
("PyDict_Type", "dict");
("_PyNone_Type", "NoneType");
("_PyNotImplemented_Type", "NotImplementedType");
] in
add_exc_equivs builtin_exceptions post >>% fun flow ->
let init_flags = C.Ast.find_c_fundec_by_name "init_flags" flow in
(man.exec (mk_expr_stmt (mk_c_call init_flags [] range) range) flow >>% fun flow ->
let init_exc_state = C.Ast.find_c_fundec_by_name "PyErr_Clear" flow in
man.exec (mk_expr_stmt (mk_c_call init_exc_state [] range) range) flow)
else
Post.return flow
and python_to_c_boundary addr oaddr_ctyp oe ?(size=None) range man (flow: 'a flow) : ('a eval) =
let pyobject_typ, pytypeobject_typ =
let assign_helper = C.Ast.find_c_fundec_by_name "_PyType_Assign_Helper" flow in
under_pointer_type @@ vtyp @@ List.hd assign_helper.c_func_parameters,
under_pointer_type @@ vtyp @@ List.hd @@ List.tl assign_helper.c_func_parameters in
let addr_ctyp = match oaddr_ctyp with
| None -> T_c_pointer pyobject_typ
| Some s -> s in
if not @@ is_py_addr addr then
Cases.return (mk_addr ~etyp:addr_ctyp addr range) flow
else
man.get T_cur flow >>$ fun cur_env flow ->
if EquivBaseAddrs.is_bottom cur_env then
let () = debug "python_to_c_boundary: bottom state, skipping" in
Cases.return (mk_addr addr ~etyp:addr_ctyp range) flow
else
EquivBaseAddrs.find_opt_from_py (fst @@ Python.Addr.find_builtin "type") range man flow >>$ fun oa flow ->
(if oa = None then
try_init flow man range
else
Post.return flow) >>% fun flow ->
let () = debug "python_to_c_boundary %a %a %a" pp_range range pp_addr addr pp_typ addr_ctyp in
let type_addr = match akind addr with
| A_py_instance a -> a
| Python.Objects.Py_list.A_py_list -> fst @@ find_builtin "list"
| Python.Objects.Py_list.A_py_iterator (s, _) -> fst @@ find_builtin s
| Python.Objects.Py_set.A_py_set -> fst @@ find_builtin "set"
| Python.Objects.Dict.A_py_dict -> fst @@ find_builtin "dict"
| Python.Objects.Tuple.A_py_tuple _ -> fst @@ find_builtin "tuple"
| A_py_c_class _ | A_py_class _ -> fst @@ find_builtin "type"
| A_py_module _ | A_py_c_module _ -> fst @@ find_builtin "module"
| A_py_function _ -> fst @@ find_builtin "function"
| A_py_method _ -> fst @@ find_builtin "method"
| _ -> panic_at range "parent addr of %a?" pp_addr addr in
(
EquivBaseAddrs.find_opt_from_py addr range man flow >>$ fun inverse flow ->
match inverse with
| Some inverse ->
let () = debug "%a already converted according to equiv: %a" pp_addr addr pp_points_to inverse in
Cases.return (points_to_to_c_expr inverse addr_ctyp range) flow
| None ->
let () = debug "converting %a" pp_addr addr in
python_to_c_boundary type_addr (Some (T_c_pointer pytypeobject_typ)) None range man flow >>$ fun type_c_addr flow ->
let is_cls = match akind addr with
| A_py_class _ | A_py_c_class _ -> true
| _ -> false
in
let obj = mk_addr ~mode:(Some STRONG) ~etyp:(T_c_pointer pyobject_typ) addr range in
let final_obj = mk_addr ~etyp:(T_c_pointer pyobject_typ) addr range in
let bytes = C.Cstubs.Aux_vars.mk_bytes_var addr in
let bytes_size = match size with
| None ->
let size = sizeof_type (if is_cls then pytypeobject_typ else pyobject_typ) flow in
mk_z ~typ:(T_c_integer C_unsigned_long) size range
| Some s -> s in
let flow = EquivBaseAddrs.add_addr addr man flow |> post_to_flow man in
(
man.exec ~route:(Semantic "C") (mk_add obj range) flow >>% fun flow ->
let () = debug "adding bytes var %a" pp_var bytes in
man.exec ~route:(Semantic "Universal") (mk_add_var bytes range) flow >>%
man.exec ~route:(Semantic "Universal") (mk_assign (mk_var bytes range) bytes_size range) >>%
fun flow ->
let set_default_flags_func = C.Ast.find_c_fundec_by_name "set_default_flags" flow in
let set_tp_alloc_py_class = C.Ast.find_c_fundec_by_name "set_tp_alloc_py_class" flow in
let flow =
if is_cls then
let cls_obj = mk_addr ~mode:(Some STRONG) ~etyp:(T_c_pointer pytypeobject_typ) addr range in
post_to_flow man
(
(match akind addr with
| A_py_class (_, m) ->
let base_addr, _ = List.hd @@ List.tl m in
py_addr_to_c_expr base_addr pytypeobject_typ range man flow >>$ fun base_obj flow ->
(man.exec
(mk_expr_stmt
(mk_c_call
set_tp_alloc_py_class
[cls_obj; base_obj]
range)
range) flow)
| _ -> Post.return flow) >>% fun flow ->
(match akind addr with
| A_py_class _ ->
assume ~route:(Semantic "Python")
(Python.Ast.mk_py_ll_hasattr (mk_py_object (addr, oe) range) (mk_string "__next__" range) range)
man flow
~fthen:(man.exec (mk_assign (mk_c_arrow_access_by_name cls_obj "tp_iternext" range) (mk_expr (E_c_function (find_c_fundec_by_name "slot_tp_iternext" flow)) range) range))
~felse:Post.return
| _ -> Post.return flow )>>%
man.exec
(mk_expr_stmt
(mk_c_call
set_default_flags_func
[cls_obj]
range)
range) >>%
Post.return
)
else flow in
debug "ob_type assignment: obj = %a, type_obj = %a" pp_expr obj pp_expr type_c_addr;
man.exec (mk_assign
(mk_c_deref (mk_c_cast
(add (mk_c_cast obj (T_c_pointer s8) range) (mk_int 8 range) range)
(T_c_pointer (T_c_pointer pytypeobject_typ)) range) range)
type_c_addr
range) flow
) >>% Cases.return final_obj
) >>$ fun c_addr flow ->
let post =
match akind type_addr with
| A_py_class (C_builtin ("int" | "bool"), _) ->
debug "boundary @ %a, assigning %a.value = %a" pp_range range pp_addr addr (OptionExt.print pp_expr) oe;
flow |> man.exec (mk_assign
(mk_avalue_from_pyaddr addr T_int range)
(OptionExt.none_to_exn oe) range)
| A_py_class (C_builtin "float", _) ->
debug "boundary @ %a, assigning %a.value = %a" pp_range range pp_addr addr (OptionExt.print pp_expr) oe;
flow |> man.exec (mk_assign
(mk_avalue_from_pyaddr addr (T_float F_DOUBLE) range)
(OptionExt.none_to_exn oe) range)
| A_py_class (C_builtin "str", _)
| A_py_class (C_builtin "bytes", _) ->
debug "boundary @ %a, assigning %a.value = %a" pp_range range pp_addr addr (OptionExt.print pp_expr) oe;
flow |> man.exec (mk_assign
(mk_avalue_from_pyaddr addr T_string range)
(OptionExt.none_to_exn oe) range)
| _ -> Post.return flow in
post >>% Cases.return c_addr
let new_class_from_def ecls man flow =
let range = erange ecls in
resolve_pointer ecls man flow >>$
fun cls flow ->
(match cls with
| P_block ({base_kind = Var v}, _, _) ->
alloc_py_addr man (Python.Addr.A_py_c_class (get_orig_vname v)) range flow >>$ fun cls_eaddr flow ->
EquivBaseAddrs.add_c_py_equiv cls (Addr.from_expr cls_eaddr) man flow >>% fun flow ->
Cases.singleton cls_eaddr flow
| P_block ({base_kind = Addr a}, _, _) ->
python_to_c_boundary a None None range man flow >>$ fun cls_eaddr flow ->
Cases.singleton cls_eaddr flow
| _ -> assert false) >>$ fun cls_eaddr flow ->
let cls_addr = Addr.from_expr cls_eaddr in
bind_function_in "__new__"
(mk_c_address_of (mk_expr (E_c_function (C.Ast.find_c_fundec_by_name "tp_new_wrapper" flow)) range) range)
cls_addr Builtin_function_or_method man flow >>%
bind_function_in "__init__"
(mk_c_arrow_access_by_name ecls "tp_init" range)
cls_addr (Wrapper_descriptor (Some "wrap_init")) man >>%
bind_function_in "__repr__"
(mk_c_arrow_access_by_name ecls "tp_repr" range)
cls_addr (Wrapper_descriptor (Some "wrap_unaryfunc")) man >>%
bind_function_in "__iter__"
(mk_c_arrow_access_by_name ecls "tp_iter" range)
cls_addr (Wrapper_descriptor (Some "wrap_unaryfunc")) man >>%
bind_function_in "__next__"
(mk_c_arrow_access_by_name ecls "tp_iternext" range)
cls_addr (Wrapper_descriptor (Some "wrap_next")) man >>%
bind_function_in "__lt__"
(mk_c_arrow_access_by_name ecls "tp_richcompare" range)
cls_addr (Wrapper_descriptor (Some "richcmp_lt")) man >>%
bind_function_in "__le__"
(mk_c_arrow_access_by_name ecls "tp_richcompare" range)
cls_addr (Wrapper_descriptor (Some "richcmp_le")) man >>%
bind_function_in "__eq__"
(mk_c_arrow_access_by_name ecls "tp_richcompare" range)
cls_addr (Wrapper_descriptor (Some "richcmp_eq")) man >>%
bind_function_in "__ne__"
(mk_c_arrow_access_by_name ecls "tp_richcompare" range)
cls_addr (Wrapper_descriptor (Some "richcmp_ne")) man >>%
bind_function_in "__gt__"
(mk_c_arrow_access_by_name ecls "tp_richcompare" range)
cls_addr (Wrapper_descriptor (Some "richcmp_gt")) man >>%
bind_function_in "__ge__"
(mk_c_arrow_access_by_name ecls "tp_richcompare" range)
cls_addr (Wrapper_descriptor (Some "richcmp_ge")) man >>%
bind_function_in "__call__"
(mk_c_arrow_access_by_name ecls "tp_call" range)
cls_addr (Wrapper_descriptor (Some "wrap_call")) man >>%
fun flow ->
assume
(ne
(mk_c_arrow_access_by_name ecls "tp_as_sequence" range)
(mk_c_null range)
~etyp:T_bool range)
man flow
~fthen:(fun flow ->
let as_sequence s = mk_c_arrow_access_by_name (mk_c_arrow_access_by_name ecls "tp_as_sequence" range) s range in
Post.return flow >>%
bind_function_in "__len__" (as_sequence "sq_length")
cls_addr (Wrapper_descriptor (Some "wrap_lenfunc")) man >>%
bind_function_in "__contains__" (as_sequence "sq_contains")
cls_addr (Wrapper_descriptor (Some "wrap_objobjproc")) man >>%
bind_function_in "__add__" (as_sequence "sq_concat")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc")) man >>%
bind_function_in "__mul__" (as_sequence "sq_repeat")
cls_addr (Wrapper_descriptor (Some "wrap_indexargfunc")) man >>%
bind_function_in "__rmul__" (as_sequence "sq_repeat")
cls_addr (Wrapper_descriptor (Some "wrap_indexargfunc")) man >>%
bind_function_in "__getitem__" (as_sequence "sq_item")
cls_addr (Wrapper_descriptor (Some "wrap_sq_item")) man >>%
bind_function_in "__setitem__" (as_sequence "sq_ass_item")
cls_addr (Wrapper_descriptor (Some "wrap_sq_setitem")) man >>%
bind_function_in "__delitem__" (as_sequence "sq_ass_item")
cls_addr (Wrapper_descriptor (Some "wrap_sq_delitem")) man >>%
bind_function_in "__iadd__" (as_sequence "sq_inplace_concat")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc")) man >>%
bind_function_in "__im__" (as_sequence "sq_inplace_repeat")
cls_addr (Wrapper_descriptor (Some "wrap_indexargfunc")) man
)
~felse:(fun flow ->
debug "tp_as_sequence is NULL, skipping";
Post.return flow) >>% fun flow ->
assume
(ne
(mk_c_arrow_access_by_name ecls "tp_as_number" range)
(mk_c_null range)
~etyp:T_bool range)
man flow
~fthen:(fun flow ->
let as_number s = mk_c_arrow_access_by_name (mk_c_arrow_access_by_name ecls "tp_as_number" range) s range in
Post.return flow >>%
bind_function_in "__invert__" (as_number "nb_invert")
cls_addr (Wrapper_descriptor (Some "wrap_unaryfunc")) man >>%
bind_function_in "__and__" (as_number "nb_and")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc_l")) man >>%
bind_function_in "__xor__" (as_number "nb_xor")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc_l")) man >>%
bind_function_in "__or__" (as_number "nb_or")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc_l")) man >>%
bind_function_in "__rand__" (as_number "nb_and")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc_r")) man >>%
bind_function_in "__rxor__" (as_number "nb_xor")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc_r")) man >>%
bind_function_in "__ror__" (as_number "nb_or")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc_r")) man >>%
bind_function_in "__iand__" (as_number "nb_inplace_and")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc")) man >>%
bind_function_in "__ixor__" (as_number "nb_inplace_xor")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc")) man >>%
bind_function_in "__ior__" (as_number "nb_inplace_or")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc")) man
)
~felse:(fun flow ->
debug "tp_as_sequence is NULL, skipping";
Post.return flow) >>% fun flow ->
assume
(ne
(mk_c_arrow_access_by_name ecls "tp_as_mapping" range)
(mk_c_null range)
~etyp:T_bool range)
man flow
~fthen:(fun flow ->
let as_mapping s = mk_c_arrow_access_by_name (mk_c_arrow_access_by_name ecls "tp_as_mapping" range) s range in
Post.return flow >>%
bind_function_in "__len__" (as_mapping "mp_length")
cls_addr (Wrapper_descriptor (Some "wrap_lenfunc")) man >>%
bind_function_in "__getitem__" (as_mapping "mp_subscript")
cls_addr (Wrapper_descriptor (Some "wrap_binaryfunc")) man >>%
bind_function_in "__setitem__" (as_mapping "mp_ass_subscript")
cls_addr (Wrapper_descriptor (Some "wrap_objobjargproc")) man
)
~felse:(fun flow ->
debug "tp_as_mapping is NULL, skipping";
Post.return flow) >>% fun flow ->
debug "add_pymethoddef";
add_pymethoddef "tp_methods" cls_addr Method_descriptor ecls man flow >>%
add_pymemberdef cls_addr ecls man >>% fun flow ->
let flow = Flow.add_local_assumption (A_cpython_unsupported_fields "tp_as_async, tp_hash, tp_clear ...") range flow in
Cases.singleton cls_addr flow
let c_set_exception c_exn message range man flow =
man.exec (mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_var (search_c_globals_for flow c_exn) range;
mk_c_string message range
]
range) flow
let normalize_fmt_str fmt_str =
let mandatory_fmt, optional_fmt = match String.split_on_char '|' fmt_str with
| [s] -> s, ""
| [s; s'] -> s, s'
| _ -> assert false in
let strip_error_message s = List.hd (String.split_on_char ';' s) in
let strip_error_funcname s = List.hd (String.split_on_char ':' s) in
let compute_length s =
let s = strip_error_message s in
let s = strip_error_funcname s in
let rec aux pos acc =
if pos >= String.length s then acc
else
match s.[pos] with
| '(' | ')' -> aux (pos+1) acc
| _ -> aux (pos+1) (acc+1)
in aux 0 0 in
let min_size = compute_length mandatory_fmt in
let max_size = min_size + compute_length optional_fmt in
mandatory_fmt ^ optional_fmt, min_size, max_size
let len_of man addr flow range =
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (Python.Addr.find_builtin_function "len") range)
[Python.Ast.mk_py_object (addr, None) range] range) flow >>$ fun earg flow ->
match ekind @@ OptionExt.none_to_exn @@ snd @@ object_of_expr earg with
| E_constant (C_int z) -> Cases.singleton (Z.to_int z) flow
| _ -> assert false
let pylong_to_c_type arg range man flow (type_min_value, type_max_value, type_name) =
resolve_c_pointer_into_addr arg man flow >>$
(fun oaddr flow ->
match oaddr with
| Some (Nt addr) ->
begin match akind addr with
| A_py_instance {addr_kind = A_py_class (C_builtin ("int" | "bool"), _)} ->
man.eval (mk_avalue_from_pyaddr addr T_int range) flow >>$
fun int_value flow ->
let max_value = mk_z type_max_value ~typ:T_int range in
let min_value = mk_z type_min_value ~typ:T_int range in
let overflow_check =
log_and
(le int_value max_value range)
(ge int_value min_value range)
range in
assume
overflow_check
man flow
~fthen:(Eval.singleton int_value)
~felse:(fun flow ->
c_set_exception "PyExc_OverflowError" (Format.asprintf "Python int too large to convert to C %s" type_name) range man flow >>%
Eval.singleton (mk_int ~typ:T_int (-1) range)
)
| _ ->
c_set_exception "PyExc_TypeError" (Format.asprintf "an integer is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>%
fun flow ->
Eval.singleton (mk_int ~typ:T_int (-1) range) flow
end
| _ -> assert false
)
let c_int_to_python arg man flow range =
man.eval (mk_c_call (C.Ast.find_c_fundec_by_name "PyLong_FromLong" flow) [arg] range) flow >>$
fun py_pos flow ->
Eval.singleton (mk_py_object (Addr.from_expr py_pos, Some (mk_avalue_from_pyaddr (Addr.from_expr py_pos) T_int range)) range) flow
let fold_c_to_python_boundary ?(safe_check = None) man range c_objs flow =
let rec aux c_objs py_acc flow =
match c_objs with
| [] -> Cases.singleton (List.rev py_acc) flow
| c_hd :: tl ->
c_to_python_boundary ~safe_check c_hd man flow range >>$
fun py_object flow ->
aux tl (py_object :: py_acc) flow
in aux c_objs [] flow
let build_value man flow range fmt_str refs =
let fmt_length = String.length fmt_str in
let rec process pos ref_pos until acc flow =
debug "process %d %d %d %c |acc|=%d" pos ref_pos until (if pos < until then fmt_str.[pos] else ' ') (List.length acc);
if pos >= until then Cases.singleton (List.rev acc) flow
else
let range = tag_range range "process[%d]" pos in
begin match fmt_str.[pos] with
| 'b' | 'B' | 'h' | 'i' ->
let pylong_fromlong = C.Ast.find_c_fundec_by_name "PyLong_FromLong" flow in
man.eval (mk_c_call pylong_fromlong [mk_c_cast (List.nth refs ref_pos) sl range] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 'c' ->
let pyunicode_fromwidechar = C.Ast.find_c_fundec_by_name "PyBytes_FromStringAndSize" flow in
man.eval (mk_c_call pyunicode_fromwidechar
[
List.nth refs ref_pos;
mk_one range
] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 'd' | 'f' ->
let pyfloat_fromdouble = C.Ast.find_c_fundec_by_name "PyFloat_FromDouble" flow in
man.eval (mk_c_call pyfloat_fromdouble [mk_c_cast (List.nth refs ref_pos) (T_c_float C_double) range] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 'k' ->
let pylong_fromunsignedlong = C.Ast.find_c_fundec_by_name "PyLong_FromUnsignedLong" flow in
man.eval (mk_c_call pylong_fromunsignedlong [mk_c_cast (List.nth refs ref_pos) ul range] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 'n' ->
let pylong_fromssize_t = C.Ast.find_c_fundec_by_name "PyLong_FromSsize_t" flow in
man.eval (mk_c_call pylong_fromssize_t [List.nth refs ref_pos] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 'O' ->
man.eval (List.nth refs ref_pos) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 's' when pos+1 < fmt_length && fmt_str.[pos+1] = '#'->
warn_at range "Py_BuildValue: s# processed as s";
let pyunicode_fromstring = C.Ast.find_c_fundec_by_name "PyUnicode_FromString" flow in
assume (eq (List.nth refs ref_pos) (mk_c_null range) range) man flow
~fthen:(fun flow ->
python_to_c_boundary (OptionExt.none_to_exn !Python.Types.Addr_env.addr_none) None None range man flow >>$ fun c_addr flow ->
process (pos+2) (ref_pos+2) until (c_addr :: acc) flow
)
~felse:(fun flow ->
man.eval (mk_c_call pyunicode_fromstring [List.nth refs ref_pos] range) flow >>$
fun res_pos flow ->
process (pos+2) (ref_pos+2) until (res_pos :: acc) flow
)
| 's' ->
let pyunicode_fromstring = C.Ast.find_c_fundec_by_name "PyUnicode_FromString" flow in
assume (eq (List.nth refs ref_pos) (mk_c_null range) range) man flow
~fthen:(fun flow ->
python_to_c_boundary (OptionExt.none_to_exn !Python.Types.Addr_env.addr_none) None None range man flow >>$ fun c_addr flow ->
process (pos+1) (ref_pos+1) until (c_addr :: acc) flow
)
~felse:(fun flow ->
man.eval (mk_c_call pyunicode_fromstring [List.nth refs ref_pos] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
)
| 'u' when pos+1 < fmt_length && fmt_str.[pos+1] = '#'->
let pyunicode_fromwidechar = C.Ast.find_c_fundec_by_name "PyUnicode_FromWideChar" flow in
man.eval (mk_c_call pyunicode_fromwidechar
[
List.nth refs ref_pos;
List.nth refs (ref_pos+1);
] range) flow >>$
fun res_pos flow ->
process (pos+2) (ref_pos+2) until (res_pos :: acc) flow
| 'u' ->
let pyunicode_fromwidechar = C.Ast.find_c_fundec_by_name "PyUnicode_FromWideChar" flow in
let wcslen = C.Ast.find_c_fundec_by_name "wcslen" flow in
man.eval (mk_c_call pyunicode_fromwidechar [List.nth refs ref_pos; mk_c_call wcslen [List.nth refs ref_pos] range] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| 'y' when pos+1 < fmt_length && fmt_str.[pos+1] = '#'->
let pybytes_fromsas = C.Ast.find_c_fundec_by_name "PyBytes_FromStringAndSize" flow in
man.eval (mk_c_call pybytes_fromsas
[
List.nth refs ref_pos;
List.nth refs (ref_pos+1);
] range) flow >>$
fun res_pos flow ->
process (pos+2) (ref_pos+2) until (res_pos :: acc) flow
| 'y' ->
let pybytes_fromsas = C.Ast.find_c_fundec_by_name "PyBytes_FromStringAndSize" flow in
let strlen = C.Ast.find_c_fundec_by_name "strlen" flow in
man.eval (mk_c_call pybytes_fromsas [List.nth refs ref_pos; mk_c_call strlen [List.nth refs ref_pos] range] range) flow >>$
fun res_pos flow ->
process (pos+1) (ref_pos+1) until (res_pos :: acc) flow
| '{' ->
let closing_bracket_pos =
let rec search count pos =
if fmt_str.[pos] = '}' then
if count = 0 then pos
else search (count-1) (pos+1)
else if fmt_str.[pos] = '{' then
search (count+1) (pos+1)
else search count (pos+1) in
search 0 (pos+1) in
let dict_subfmt = String.sub fmt_str pos (closing_bracket_pos - pos - 1) in
debug "starting process_dict %s" dict_subfmt;
process_dict pos ref_pos closing_bracket_pos flow >>$
fun dict flow ->
process (closing_bracket_pos+1) (ref_pos + 2 * (List.length (String.split_on_char ',' dict_subfmt))) until (dict :: acc) flow
| '(' ->
let closing_par_pos =
let rec search count pos =
if fmt_str.[pos] = ')' then
if count = 0 then pos
else search (count-1) (pos+1)
else if fmt_str.[pos] = '(' then
search (count+1) (pos+1)
else search count (pos+1) in
search 0 (pos+1) in
let tuple_subfmt = String.sub fmt_str pos (closing_par_pos - pos - 1) in
debug "starting to process tuple";
process (pos+1) ref_pos closing_par_pos [] flow >>$ fun tuple_values flow ->
debug "tuple processing done!";
fold_c_to_python_boundary man range tuple_values flow >>$ fun tuple_values flow ->
man.eval ~route:(Semantic "Python") (mk_expr ~etyp:(T_py None) (Python.Ast.E_py_tuple tuple_values) range) flow >>$ fun py_tuple flow ->
let addr_py_tuple, oe_py_tuple = object_of_expr py_tuple in
python_to_c_boundary addr_py_tuple None oe_py_tuple range man flow >>$ fun c_addr flow ->
process (closing_par_pos + 1) (ref_pos + String.length tuple_subfmt) until (c_addr::acc) flow
| _ -> panic_at range "Py_BuildValue unhandled format %s" fmt_str
end
and process_dict beg_pos ref_pos end_pos flow =
let rec aux cur_pos ref_pos dict_acc flow =
if cur_pos >= end_pos then Cases.singleton (List.rev dict_acc) flow else
let () = assert(fmt_str.[cur_pos+1] = ':') in
let () = assert(fmt_str.[cur_pos+3] = ',' || cur_pos + 3 >= end_pos) in
process cur_pos ref_pos (cur_pos+1) [] flow >>$ fun key flow ->
process (cur_pos+2) (ref_pos+1) (cur_pos+3) [] flow >>$ fun value flow ->
let key = match key with [k] -> k | _ -> assert false in
let value = match value with [v] -> v | _ -> assert false in
debug "key = %a, value = %a" pp_expr key pp_expr value;
aux (cur_pos+4) (ref_pos+2) ((key,value) :: dict_acc) flow
in
aux (beg_pos+1) ref_pos [] flow >>$
fun dict flow ->
let dict_keys, dict_values = List.split dict in
fold_c_to_python_boundary man range dict_keys flow >>$ fun dict_keys flow ->
fold_c_to_python_boundary man range dict_values flow >>$ fun dict_values flow ->
man.eval (mk_expr (Python.Ast.E_py_dict (dict_keys, dict_values)) range) flow >>$
fun py_dict flow ->
let addr_py_dict, oe_py_dict = object_of_expr py_dict in
python_to_c_boundary addr_py_dict None oe_py_dict range man flow >>$ fun c_addr flow ->
man.eval c_addr flow in
process 0 0 fmt_length [] flow
let convert_single man obj fmt output_ref range flow =
match ekind obj, ekind output_ref with
| Python.Ast.E_py_object(addr, oe), E_c_address_of c ->
begin match fmt with
| 'c' ->
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_bytes) = 0 then
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
assume ~route:(Semantic "Python") (eq (Python.Utils.mk_builtin_call "len" [obj] range) (mk_one ~typ:(T_py None) range) ~etyp:(T_py None) range) man flow
~fthen:(fun flow ->
let pybytes_asstring = C.Ast.find_c_fundec_by_name "PyBytes_AsString" flow in
man.exec (mk_assign c (mk_c_subscript_access (mk_c_call pybytes_asstring [c_addr] range) (mk_zero range) range) range) flow >>% Cases.return 1
)
~felse:(fun flow ->
man.eval (Python.Utils.mk_builtin_call "len" [obj] range) flow >>$ fun py_len flow ->
let itv_len = ask_and_reduce man.ask (Universal.Numeric.Common.mk_int_interval_query (Python.Utils.extract_oobject py_len)) flow in
c_set_exception "PyExc_TypeError" (Format.asprintf "expected a byte string of length 1, not of length %a"
Universal.Numeric.Common.pp_int_interval itv_len)
range man flow >>% Cases.return 0)
else
c_set_exception "PyExc_TypeError" (Format.asprintf "expected a byte string of length 1, got a wrongly typed value %a" pp_addr addr) range man flow >>% Cases.return 0
| 'd'
| 'f' ->
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_float) = 0 then
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
let pyfloat_asdouble = C.Ast.find_c_fundec_by_name "PyFloat_AsDouble" flow in
let pyerr_occurred =
mk_c_arrow_access_by_name (mk_var (search_c_globals_for flow "exc") range) "exc_state" range in
man.eval (mk_c_call pyfloat_asdouble [c_addr] range) flow >>$ fun float_val flow ->
assume (log_and
(eq float_val {(mk_float ~prec:(F_DOUBLE) (-1.) range) with etyp=T_c_float C_double} range)
(ne pyerr_occurred (mk_c_null range) range)
~etyp:T_bool range)
man flow
~fthen:(fun flow ->
debug "conversion error %a" pp_expr float_val;
Cases.return 0 flow)
~felse:(fun flow ->
debug "trying conversion %a %a" pp_typ (etyp c) pp_typ (etyp float_val);
man.exec (mk_assign c (if fmt = 'f' then mk_c_cast float_val (T_c_float C_float) range else float_val) range) flow >>% Cases.return 1)
else
let () = debug "not a float..." in
c_set_exception "PyExc_TypeError" (Format.asprintf "a float is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>% Cases.return 0
| 'h' ->
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_integers) = 0 then
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
debug "value should be stored %a" pp_expr (mk_avalue_from_pyaddr addr T_int range);
assume (mk_c_call
(C.Ast.find_c_fundec_by_name "PyParseTuple_shortint_helper" flow)
[c_addr; mk_c_address_of c range]
range)
man flow
~fthen:(Cases.return 1)
~felse:(Cases.return 0)
else
let () = debug "wrong type for convert_single integer" in
c_set_exception "PyExc_TypeError" (Format.asprintf "an integer is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>% Cases.return 0
| 'i' ->
debug "got obj = %a" pp_expr obj;
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_integers) = 0 then
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
debug "value should be stored %a" pp_expr (mk_avalue_from_pyaddr addr T_int range);
assume (mk_c_call
(C.Ast.find_c_fundec_by_name "PyParseTuple_int_helper" flow)
[c_addr; mk_c_address_of c range]
range)
man flow
~fthen:(Cases.return 1)
~felse:(Cases.return 0)
else
let () = debug "wrong type for convert_single integer" in
c_set_exception "PyExc_TypeError" (Format.asprintf "an integer is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>% Cases.return 0
| 'n' ->
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_integers) = 0 then
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
let pylong_as_ssizet = C.Ast.find_c_fundec_by_name "PyLong_AsSsize_t" flow in
man.exec (mk_assign c (mk_c_call pylong_as_ssizet [c_addr] range) range) flow >>% Cases.return 1
else
c_set_exception "PyExc_TypeError" (Format.asprintf "an integer is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>% Cases.return 0
| 'O' ->
debug "ParseTuple O ~> %a" pp_addr addr;
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
man.exec (mk_assign c c_addr range) flow >>%
fun flow -> Cases.return 1 flow
| 'p' ->
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
man.eval (mk_c_call (find_c_fundec_by_name "PyObject_IsTrue" flow) [c_addr] range) flow >>$ (fun c_val flow ->
assume (gt c_val (mk_zero range) range) man flow
~fthen:(fun flow -> man.exec (mk_assign c (mk_one range) range) flow >>% Cases.return 1)
~felse:(fun flow ->
assume (eq c_val (mk_zero range) range) man flow
~fthen:(fun flow -> man.exec (mk_assign c (mk_zero range) range) flow >>% Cases.return 1)
~felse:(Cases.return 0)
)
)
| 's' ->
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0 then
materialize_builtin_val_addr addr man range flow >>$ fun addr flow ->
python_to_c_boundary addr None oe range man flow >>$ fun c_addr flow ->
let pyunicode_asuas = C.Ast.find_c_fundec_by_name "PyUnicode_AsUTF8AndSize" flow in
man.exec (mk_assign c (mk_c_call pyunicode_asuas [c_addr; mk_c_null range] range) range) flow >>% Cases.return 1
else
c_set_exception "PyExc_TypeError" (Format.asprintf "a string is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>% Cases.return 0
| _ ->
if man.lattice.is_bottom (Flow.get T_cur man.lattice flow) then
let () = warn_at range "PyArg_ParseTuple(AndKeywords)? %c unsupported, but cur is bottom" fmt in
Cases.return 1 flow
else
panic_at range "TODO: implement PyArg_ParseTuple(AndKeywords)? %c" fmt
end
| _ -> assert false
let rec eval exp man flow =
let range = erange exp in
match ekind exp with
| E_var ({vkind = V_cvar v}, _) when List.mem v.cvar_uniq_name builtin_exceptions ->
let py_name = String.sub v.cvar_uniq_name 6 (String.length v.cvar_uniq_name - 6) in
Eval.singleton (mk_addr (fst @@ Python.Addr.find_builtin py_name) range) flow
|> OptionExt.return
| E_c_builtin_call ("PyModule_Create2", [module_decl; _]) ->
let flow = try_init flow man range in
new_module_from_def module_decl man (post_to_flow man flow)
|> OptionExt.return
| E_c_builtin_call ("PyModule_AddObject", [module_object; obj_name; obj]) ->
c_to_python_boundary module_object man flow range >>$
(
fun module_object flow ->
let module_addr, module_oexpr = object_of_expr module_object in
safe_get_name_of obj_name man flow >>$
fun oobj_name flow ->
let obj_name = Top.top_to_exn (OptionExt.none_to_exn oobj_name) in
c_to_python_boundary obj man flow range >>$
fun obj flow ->
let obj_addr, obj_oe = object_of_expr obj in
bind_in_python module_addr obj_name obj_addr range man flow
>>= fun flow ->
Eval.singleton (mk_zero range)
)
|> OptionExt.return
| E_c_builtin_call ("PyType_IsSubtype", [tobj; tobj']) ->
c_to_python_boundary tobj man flow range >>$ (fun py_cls flow ->
c_to_python_boundary tobj' man flow range >>$ fun py_cls' flow ->
assume (Python.Addr.mk_py_issubclass py_cls py_cls' range)
man flow
~fthen:(Eval.singleton (mk_one range))
~felse:(Eval.singleton (mk_zero range)))
|> OptionExt.return
| E_c_builtin_call ("PyType_FromSpec", [spec]) ->
let pyobject_typ, pytypeobject_typ =
let assign_helper = C.Ast.find_c_fundec_by_name "_PyType_Assign_Helper" flow in
under_pointer_type @@ vtyp @@ List.hd assign_helper.c_func_parameters,
under_pointer_type @@ vtyp @@ List.hd @@ List.tl assign_helper.c_func_parameters in
safe_get_name_of (mk_c_arrow_access_by_name spec "name" range) man flow >>$ (fun cls_oname flow ->
let cls_name = Top.top_to_exn @@ OptionExt.none_to_exn cls_oname in
alloc_py_addr man (Python.Addr.A_py_c_class cls_name) range flow >>$ fun cls_addr flow ->
python_to_c_boundary (Addr.from_expr cls_addr) (Some (T_c_pointer pytypeobject_typ)) None range man flow >>$ fun cls_addr flow ->
let cls_addr = mk_c_cast cls_addr (T_c_pointer pytypeobject_typ) range in
let copy_spec_tp spec_name tp_name =
debug "%s %s %a" spec_name tp_name pp_typ cls_addr.etyp;
man.exec (mk_assign (mk_c_arrow_access_by_name cls_addr tp_name range) (mk_c_arrow_access_by_name spec spec_name range) range) in
List.fold_left (fun post (spec, tp) -> post >>% copy_spec_tp spec tp) (Post.return flow)
[("name", "tp_name");
("basicsize", "tp_basicsize");
("itemsize", "tp_itemsize");
("flags", "tp_flags")
] >>% fun flow ->
let equivs =
[
60 , "tp_init";
65 , "tp_new";
64 , "tp_methods";
72 , "tp_members";
66, "tp_repr";
62, "tp_iter";
63, "tp_iternext";
67, "tp_richcompare";
] in
let set_tp_fields_to_null flow =
let fields = List.map snd equivs @ ["tp_as_number"; "tp_as_sequence"; "tp_as_mapping"] in
List.fold_left (fun post f -> post >>% man.exec (mk_assign (mk_c_arrow_access_by_name cls_addr f range) (mk_c_null range) range)) (Post.return flow) fields in
set_tp_fields_to_null flow >>% fun flow ->
let copy_slot pos flow =
let curslot = mk_c_subscript_access (mk_c_arrow_access_by_name spec "slots" range) (mk_int pos range) range in
let slotid = mk_c_member_access_by_name curslot "slot" range in
let equivs = List.map (fun (spec, tp) ->
[ mk_eq slotid (mk_int spec range) range ],
(fun flow -> man.exec (mk_assign (mk_c_arrow_access_by_name cls_addr tp range) (mk_c_member_access_by_name curslot "pfunc" range) range) flow >>%
Cases.singleton true)) equivs in
switch (
([ mk_eq slotid zero range],
(fun flow -> Cases.singleton false flow)) :: equivs) man flow in
fold_until_null copy_slot 0 flow >>% fun flow ->
let pytype_ready = C.Ast.find_c_fundec_by_name "PyType_Ready" flow in
man.exec (mk_c_call_stmt pytype_ready [cls_addr] range) flow >>% fun flow ->
man.eval cls_addr flow
) |> OptionExt.return
| E_c_builtin_call ("PyType_Ready", [cls]) ->
let cheat = C.Ast.find_c_fundec_by_name "PyType_ReadyCheat" flow in
assume (eq (mk_c_call cheat [cls] range) (mk_zero range) range) man flow
~fthen:(fun flow ->
debug "after PyType_ReadyCheat";
new_class_from_def cls man flow >>$
fun cls_addr flow ->
Eval.singleton (mk_int 0 range) flow
)
~felse:(fun flow ->
debug "PyType_Ready already called according to the flag, nothing to do";
Eval.singleton (mk_int 0 range) flow
)
|> OptionExt.return
| E_c_builtin_call ("PyType_GenericAlloc_Helper", args) ->
let cls = List.hd args in
resolve_c_pointer_into_addr cls man flow >>$
(fun cls_oaddr flow ->
let cls_addr = Top.detop @@ OptionExt.none_to_exn cls_oaddr in
alloc_py_addr man (Python.Addr.A_py_instance cls_addr) range flow >>$
fun inst_eaddr flow ->
python_to_c_boundary (Addr.from_expr inst_eaddr) None None ~size:(Some (List.hd @@ List.tl args)) range man flow
)
|> OptionExt.return
| E_c_builtin_call ("PyLong_FromSsize_t", args)
| E_c_builtin_call ("PyLong_FromLong", args)
| E_c_builtin_call ("PyLong_FromUnsignedLong", args) ->
man.eval ~translate:"Universal" (List.hd args) flow >>$
(fun earg flow ->
debug "eval ~translate:Universal %a ~> %a" pp_expr (List.hd args) pp_expr earg;
debug "allocating int at range %a callstack %a" pp_range range Callstack.pp_callstack (Flow.get_callstack flow);
alloc_py_addr man (A_py_instance (fst @@ find_builtin "int")) range flow >>$
fun int_addr flow ->
debug "got int_addr %a, putting %a as value" pp_addr (Addr.from_expr int_addr) pp_expr earg;
python_to_c_boundary (Addr.from_expr int_addr) None (Some earg) range man flow
)
|> OptionExt.return
| E_c_builtin_call ("PyLong_AsSsize_t", args)
| E_c_builtin_call ("PyLong_AsLong", args) ->
let long_max = Z.of_string "9223372036854775807" in
let long_min = Z.of_string "-9223372036854775808" in
pylong_to_c_type (List.hd args) range man flow (long_min, long_max, "long")
|> OptionExt.return
| E_c_builtin_call ("PyFloat_AsDouble", args) ->
resolve_c_pointer_into_addr (List.hd args) man flow >>$ (fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
match akind addr with
| A_py_instance {addr_kind = A_py_class (C_builtin "float", _)} ->
man.eval (mk_unop O_cast (mk_avalue_from_pyaddr addr (T_float F_DOUBLE) range) ~etyp:(T_c_float C_double) range) flow
| _ ->
c_set_exception "PyExc_TypeError" (Format.asprintf "a float is required (got type %a)" pp_addr_kind (akind addr)) range man flow >>%
Eval.singleton (mk_int ~typ:T_int (-1) range)
) |> OptionExt.return
| E_c_builtin_call ("PyFloat_FromDouble", args) ->
man.eval ~translate:"Universal" (List.hd args) flow >>$ (fun earg flow ->
alloc_py_addr man (A_py_instance (fst @@ find_builtin "float")) range flow >>$ fun float_addr flow ->
python_to_c_boundary (Addr.from_expr float_addr) None (Some earg) range man flow
) |> OptionExt.return
| E_c_builtin_call ("PyBytes_FromStringAndSize", [v; len]) ->
man.eval (mk_top (T_py (Some Bytes)) range) flow >>$ (fun py_bytes flow ->
let py_bytes_addr, py_bytes_oe = object_of_expr py_bytes in
python_to_c_boundary py_bytes_addr None py_bytes_oe range man flow
) |> OptionExt.return
| E_c_builtin_call ("PyBytes_Size", args) ->
resolve_c_pointer_into_addr (List.hd args) man flow >>$
(fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_bytes) = 0 then
man.eval (mk_expr ~etyp:T_int (E_len (mk_avalue_from_pyaddr addr T_string range)) range) flow >>$
fun str_length flow ->
Eval.singleton str_length flow
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_int (-1) ~typ:T_int range)
)
|> OptionExt.return
| E_c_builtin_call ("PyBytes_AsString", args) ->
let o = List.hd args in
c_to_python_boundary o man flow range >>$ (fun py_o flow ->
let addr, oe = object_of_expr py_o in
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_bytes) = 0 then
let open Universal.Strings.Powerset in
let strp = ask_and_reduce man.ask (mk_strings_powerset_query (OptionExt.none_to_exn oe)) flow in
Eval.join_list ~empty:(fun () -> assert false)
(if StringPower.is_top strp then
[Eval.singleton (mk_top (T_c_array(s8, C_array_no_length)) range) flow]
else
StringPower.fold (fun s acc ->
debug "PyBytes_AsString, got %s" s;
Eval.singleton (mk_c_string s range) flow :: acc
) strp [])
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_int (-1) ~typ:T_int range)
) |> OptionExt.return
| E_c_builtin_call ("PyUnicode_Concat", [left; right]) ->
c_to_python_boundary left man flow range >>$ (fun py_left flow ->
c_to_python_boundary right man flow range >>$ fun py_right flow ->
if compare_addr_kind (akind @@ fst @@ object_of_expr py_left) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0 && compare_addr_kind (akind @@ fst @@ object_of_expr py_right) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0 then
man.eval (mk_binop py_left O_plus py_right ~etyp:(T_py None) range) flow >>$ fun py_res flow ->
python_to_c_boundary (addr_of_object @@ object_of_expr py_res) None (snd @@ object_of_expr py_res) range man flow
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_int (-1) ~typ:T_int range)
) |> OptionExt.return
| E_c_builtin_call ("PyUnicode_GetLength", args) ->
debug "GetLength %a" pp_expr (List.hd args);
resolve_c_pointer_into_addr (List.hd args) man flow >>$
(fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
debug "addr is %a %b" pp_addr addr (compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0);
if compare_addr_kind (akind addr) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0 then
man.eval (mk_expr ~etyp:T_int (E_len (mk_avalue_from_pyaddr addr T_string range)) range) flow >>$
fun str_length flow ->
Eval.singleton str_length flow
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_int (-1) ~typ:T_int range)
)
|> OptionExt.return
| E_c_builtin_call ("PyUnicode_InternFromString", args)
| E_c_builtin_call ("PyUnicode_FromString", args) ->
resolve_pointer (List.hd args) man flow >>$ (fun pt flow ->
match pt with
| P_block ({base_kind = String (s, char_kind, typ)}, _, _) ->
alloc_py_addr man (A_py_instance (fst @@ find_builtin "str")) range flow >>$
fun str_addr flow ->
python_to_c_boundary (Addr.from_expr str_addr) None (Some (mk_string s range)) range man flow
| P_top | P_block _ ->
alloc_py_addr man (A_py_instance (fst @@ find_builtin "str")) range flow >>$
fun str_addr flow ->
python_to_c_boundary (Addr.from_expr str_addr) None (Some (mk_top T_string range)) range man flow
| _ ->
panic_at range "PyUnicode_*FromString %a" pp_points_to pt
) |> OptionExt.return
| E_c_builtin_call ("PyUnicode_FromWideChar", args)
| E_c_builtin_call ("PyUnicode_FromKindAndData", args) ->
man.eval (mk_py_top T_string range) flow >>$
(fun str_addr flow ->
python_to_c_boundary (fst @@ object_of_expr str_addr) None (Some (mk_top T_string range)) range man flow)
|> OptionExt.return
| E_c_builtin_call ("PyUnicode_AsEncodedString", [unicode; encoding; errors]) ->
c_to_python_boundary unicode man flow range >>$ (fun py_unicode flow ->
man.eval ~route:(Semantic "Python") (mk_py_call (mk_py_attr py_unicode "encode" range) [] range) flow >>$ fun py_encoded flow ->
let addr_py_encoded, oe_py_encoded = object_of_expr py_encoded in
python_to_c_boundary addr_py_encoded None oe_py_encoded range man flow >>$ man.eval
) |> OptionExt.return
| E_c_builtin_call ("PyUnicode_AsUnicode", [unicode]) ->
c_to_python_boundary unicode man flow range >>$ (fun py_unicode flow ->
let addr_unicode, oe_unicode = object_of_expr py_unicode in
if compare_addr_kind (akind addr_unicode) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0 then
let open Universal.Strings.Powerset in
let strp = ask_and_reduce man.ask (mk_strings_powerset_query (OptionExt.none_to_exn oe_unicode)) flow in
Eval.join_list ~empty:(fun () -> assert false)
(StringPower.fold (fun s acc ->
Eval.singleton (mk_c_string ~kind:C_char_wide s range) flow :: acc
) strp [])
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_c_null range)
) |> OptionExt.return
| E_c_builtin_call ("PyUnicode_AsUTF8AndSize", [unicode; size]) ->
c_to_python_boundary unicode man flow range >>$ (fun py_unicode flow ->
let addr_unicode, oe_unicode = object_of_expr py_unicode in
if compare_addr_kind (akind addr_unicode) (akind @@ OptionExt.none_to_exn !Python.Types.Addr_env.addr_strings) = 0 then
resolve_c_pointer_into_addr size man flow >>$ fun size_oaddr flow ->
(match size_oaddr with
| None -> Post.return flow
| Some (Nt size_addr) ->
man.eval ~route:(Semantic "Python") (Python.Utils.mk_builtin_call "len" [py_unicode] range) flow >>$ fun py_unicode_length flow ->
let addr_py_u_l, oe_py_u_l = object_of_expr py_unicode_length in
python_to_c_boundary addr_py_u_l None oe_py_u_l range man flow >>$ fun c_addr flow ->
man.exec (mk_assign (mk_addr size_addr range) (mk_c_call (C.Ast.find_c_fundec_by_name "PyLong_AsSsize_t" flow) [c_addr] range) range) flow
| Some TOP -> assert false
) >>% fun flow ->
let open Universal.Strings.Powerset in
let strp = ask_and_reduce man.ask (mk_strings_powerset_query (OptionExt.none_to_exn oe_unicode)) flow in
Eval.join_list ~empty:(fun () -> assert false)
(StringPower.fold (fun s acc ->
Eval.singleton (mk_c_string s range) flow :: acc
) strp [])
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_c_null range)
) |> OptionExt.return
| E_c_builtin_call ("PyArg_ParseTuple", args::fmt::refs) ->
safe_get_name_of fmt man flow >>$ (fun ofmt_str flow ->
let fmt_str = Top.top_to_exn (OptionExt.none_to_exn ofmt_str) in
resolve_c_pointer_into_addr args man flow >>$ fun tuple_oaddr flow ->
let tuple_addr = Top.detop @@ OptionExt.none_to_exn tuple_oaddr in
len_of man tuple_addr flow range >>$ fun tuple_size flow ->
let fmt_str, fmt_str_itv_lo, fmt_str_itv_hi = normalize_fmt_str fmt_str in
debug "fmt_str_itv = [%d, %d]; size = %d" fmt_str_itv_lo fmt_str_itv_hi tuple_size;
if tuple_size < fmt_str_itv_lo || tuple_size > fmt_str_itv_hi then
let msg = Format.asprintf "function takes %s %d argument%s (%d given)"
(if fmt_str_itv_hi = fmt_str_itv_lo then "exactly" else if tuple_size < fmt_str_itv_lo then "at least" else "at most")
(if tuple_size < fmt_str_itv_lo then fmt_str_itv_lo else fmt_str_itv_hi)
(let s =
if tuple_size < fmt_str_itv_hi then fmt_str_itv_lo
else fmt_str_itv_hi in
if s = 1 then "" else "s")
tuple_size in
let () = debug "wrong number of arguments: %s" msg in
c_set_exception "PyExc_TypeError" msg range man flow >>% Eval.singleton (mk_zero range)
else
let rec process pos refs flow =
let range = tag_range range "convert_single[%d]" pos in
if pos < tuple_size then
man.eval (Python.Ast.mk_py_index_subscript (Python.Ast.mk_py_object (tuple_addr, None) range) (mk_int pos ~typ:(Python.Ast.T_py None) range) range) flow >>$ fun obj flow ->
convert_single man obj fmt_str.[pos] (List.hd refs) range flow >>$ fun ret flow ->
if ret = 1 then process (pos+1) (List.tl refs) flow
else Eval.singleton (mk_zero range) flow
else
Eval.singleton (mk_one range) flow
in
process 0 refs flow
)
|> OptionExt.return
| E_c_builtin_call ("PyArg_ParseTupleAndKeywords", args::kwds::fmt::kwlist::refs) ->
safe_get_name_of fmt man flow >>$ (fun ofmt_str flow ->
let fmt_str = Top.top_to_exn (OptionExt.none_to_exn ofmt_str) in
resolve_c_pointer_into_addr args man flow >>$ fun tuple_oaddr flow ->
let tuple_addr = Top.detop @@ OptionExt.none_to_exn tuple_oaddr in
len_of man tuple_addr flow range >>$ fun tuple_size flow ->
resolve_c_pointer_into_addr kwds man flow >>$ fun dict_oaddr flow ->
(match dict_oaddr with
| None -> Cases.return 0 flow
| Some (Nt dict_addr) -> len_of man dict_addr flow range
| _ -> assert false ) >>$ fun dict_size flow ->
let fmt_str, fmt_str_itv_lo, fmt_str_itv_hi = normalize_fmt_str fmt_str in
let size = tuple_size + dict_size in
debug "fmt_str_itv = [%d, %d]; size = (%d, %d)" fmt_str_itv_lo fmt_str_itv_hi tuple_size dict_size;
if size < fmt_str_itv_lo || size > fmt_str_itv_hi then
let msg = Format.asprintf "function takes %s %d argument%s (%d given)"
(if fmt_str_itv_hi = fmt_str_itv_lo then "exactly" else if size < fmt_str_itv_lo then "at least" else "at most")
(if size < fmt_str_itv_lo then fmt_str_itv_lo else fmt_str_itv_hi)
(let s =
if size < fmt_str_itv_hi then fmt_str_itv_lo
else fmt_str_itv_hi in
if s = 1 then "" else "s")
size in
let () = debug "wrong number of arguments: %s" msg in
c_set_exception "PyExc_TypeError" msg range man flow >>% Eval.singleton (mk_zero range)
else
let rec process pos nb_kwargs refs flow =
debug "process %d %d" pos nb_kwargs;
let range = tag_range range "convert_single[%d]" pos in
if pos < tuple_size then
let () = debug "in tuple" in
man.eval (Python.Ast.mk_py_index_subscript (Python.Ast.mk_py_object (tuple_addr, None) range) (mk_int pos ~typ:(Python.Ast.T_py None) range) range) flow >>$ fun obj flow ->
convert_single man obj fmt_str.[pos] (List.hd refs) range flow >>$ fun ret flow ->
if ret = 1 then process (pos+1) nb_kwargs (List.tl refs) flow
else
let () = debug "ZERO a" in
Eval.singleton (mk_zero range) flow
else if pos < fmt_str_itv_hi && dict_oaddr <> None then
safe_get_name_of (mk_c_subscript_access kwlist (mk_int pos range) range) man flow >>$ fun okw_name flow ->
let kw_name = Top.top_to_exn (OptionExt.none_to_exn okw_name) in
OptionExt.none_to_exn @@ Python.Utils.try_eval_expr man (Python.Ast.mk_py_index_subscript (Python.Ast.mk_py_object (Top.detop @@ OptionExt.none_to_exn dict_oaddr, None) range) (mk_string ~etyp:(T_py None) kw_name range) ~etyp:(T_py None) range) flow
~route:(Semantic "Python")
~on_empty:(fun _ _ _ flow ->
debug "haven't found anything for %s" kw_name;
process (pos+1) nb_kwargs (List.tl refs) flow |> OptionExt.return )
~on_result:(fun arg_value flow ->
debug "found %a for %s" pp_expr arg_value kw_name;
convert_single man arg_value fmt_str.[pos] (List.hd refs) range flow >>$ fun ret flow ->
if ret = 1 then process (pos+1) (nb_kwargs-1) (List.tl refs) flow
else
let () = debug "ZERO b" in
Eval.singleton (mk_zero range) flow
)
else
if nb_kwargs > 0 then
let () = debug "ZERO c" in
c_set_exception "PyExc_TypeError" "invalid number of arguments" range man flow >>% Eval.singleton (mk_zero range)
else
let () = debug "ok" in
Eval.singleton (mk_one range) flow
in
process 0 dict_size refs flow
) |> OptionExt.return
| E_c_builtin_call ("PyArg_UnpackTuple", args::fname::minargs::maxargs::refs) ->
safe_get_name_of fname man flow >>$
(fun ofname_str flow ->
let fname_str = Top.top_to_exn (OptionExt.none_to_exn ofname_str) in
let min_args = Z.to_int @@ OptionExt.none_to_exn @@ c_expr_to_z minargs flow in
let additional_args = (Z.to_int @@ OptionExt.none_to_exn @@ c_expr_to_z maxargs flow) - min_args in
let fmt_str = mk_c_string (Format.asprintf "%s%s:%s"
(String.make min_args 'O')
(if additional_args > 0 then "|" ^ (String.make additional_args 'O') else "")
fname_str) range in
debug "fmt_str = %a@.~> %a" pp_expr fmt_str pp_expr {exp with ekind = E_c_builtin_call ("PyArg_ParseTuple", args::fmt_str::refs)};
man.eval {exp with ekind = E_c_builtin_call ("PyArg_ParseTuple", args::fmt_str::refs)} flow
)
|> OptionExt.return
| E_c_builtin_call ("Py_BuildValue", fmt::refs) ->
safe_get_name_of fmt man flow >>$
(fun ofmt_str flow ->
let fmt_str = Top.top_to_exn (OptionExt.none_to_exn ofmt_str) in
build_value man flow range fmt_str refs >>$
fun tuple flow ->
if List.length tuple = 1 then
Eval.singleton (List.hd tuple) flow
else
fold_c_to_python_boundary man range tuple flow >>$
fun py_tuple flow ->
man.eval (mk_expr ~etyp:(T_py None) (Python.Ast.E_py_tuple py_tuple) range) flow >>$
fun py_tuple flow ->
let addr_py_tuple, oe_py_tuple = object_of_expr py_tuple in
python_to_c_boundary addr_py_tuple None oe_py_tuple range man flow >>$ fun c_addr flow ->
debug "Py_BuildValue: %a %a" pp_expr c_addr pp_typ c_addr.etyp;
man.eval c_addr flow
)
|> OptionExt.return
| E_c_builtin_call ("PyNumber_Add", [v; w]) ->
c_to_python_boundary v man flow range >>$? (fun py_v flow ->
c_to_python_boundary w man flow range >>$? fun py_w flow ->
Python.Utils.try_eval_expr man ~route:(Semantic "Python")
(mk_binop py_v O_plus py_w ~etyp:(T_py None) range) flow
~on_empty:(fun exc_exp exc_str exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun py_add_res flow ->
let addr_py_add, oe_py_add = object_of_expr py_add_res in
python_to_c_boundary addr_py_add None oe_py_add range man flow >>$ fun c_addr flow ->
man.eval c_addr flow
)
)
| E_c_builtin_call ("PyObject_CallFunction", callable::fmt::refs) ->
c_to_python_boundary callable man flow range >>$?
(fun py_callable flow ->
safe_get_name_of fmt man flow >>$?
fun ofmt_str flow ->
let fmt_str = Top.top_to_exn (OptionExt.none_to_exn ofmt_str) in
build_value man flow range fmt_str refs >>$?
fun tuple flow ->
fold_c_to_python_boundary man range tuple flow >>$?
fun py_tuple flow ->
Python.Utils.try_eval_expr
man ~route:(Semantic "Python")
(Python.Ast.mk_py_call py_callable py_tuple range) flow
~on_empty:(fun exc_exp exc_str exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun py_call_res flow ->
debug "py_call_res %a" pp_expr py_call_res;
let addr_py_res, oe_py_res = object_of_expr py_call_res in
python_to_c_boundary addr_py_res None oe_py_res range man flow >>$ fun c_addr flow ->
debug "PyObject_CallFunction: %a %a" pp_expr c_addr pp_typ c_addr.etyp;
man.eval c_addr flow
)
)
| E_c_builtin_call ("PyObject_CallObject", [callable;arg]) ->
c_to_python_boundary callable man flow range >>$? (fun py_callable flow ->
c_to_python_boundary ~on_null:(fun flow -> man.eval ~route:(Semantic "Python") (mk_expr ~etyp:(T_py None) (E_py_tuple []) range) flow) arg man flow range >>$? fun py_arg flow ->
let py_arg_vars = Python.Objects.Tuple.Domain.var_of_eobj py_arg in
debug "calling object";
Python.Utils.try_eval_expr man ~route:(Semantic "Python") (Python.Ast.mk_py_call py_callable (List.map (fun v -> mk_var v range) py_arg_vars) range) flow
~on_empty:(fun exc_exp exc_name exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun py_call_res flow ->
debug "calling object done, got %a" pp_expr py_call_res;
let addr_py_res, oe_py_res = object_of_expr py_call_res in
python_to_c_boundary addr_py_res None oe_py_res range man flow >>$ fun c_addr flow ->
man.eval c_addr flow
)
)
| E_c_builtin_call ("PyObject_CallMethod", [obj; name; format; va]) ->
man.eval (mk_c_call (find_c_fundec_by_name "PyObject_GetAttrString" flow) [obj; name] range) flow >>$ (fun callable flow ->
assume (eq callable (mk_c_null range) range) man flow
~fthen:(Eval.singleton (mk_c_null range))
~felse:(fun flow ->
assume (eq format (mk_c_null range) range) man flow
~fthen:(man.eval (mk_c_call (find_c_fundec_by_name "PyObject_CallObject" flow) [callable; format] range))
~felse:(fun flow -> panic_at range "PyObject_CallMethod, format %a not supported" pp_expr format)
)
) |> OptionExt.return
| E_c_builtin_call ("PyObject_GetAttrString", [v; name]) ->
c_to_python_boundary v man flow range >>$ (fun py_v flow ->
safe_get_name_of name man flow >>$ fun oname flow ->
let name = Top.detop @@ OptionExt.none_to_exn oname in
man.eval ~route:(Semantic "Python") (Python.Ast.mk_py_attr py_v name range) flow >>$ fun py_res flow ->
let addr_py_res, oe_py_res = object_of_expr py_res in
python_to_c_boundary addr_py_res None oe_py_res range man flow
) |> OptionExt.return
| E_c_builtin_call ("PyObject_RichCompareBool" as f, [left; right; op])
| E_c_builtin_call ("PyObject_RichCompare" as f, [left; right; op]) ->
let check_null flow =
assume (eq (mk_c_arrow_access_by_name (mk_var (search_c_globals_for flow "exc") range) "exc_state" range) (mk_c_null range) range) man flow
~fthen:(man.exec (mk_c_call_stmt (find_c_fundec_by_name "PyErr_BadInternalCall" flow) [] range))
~felse:(Post.return)
>>% man.eval (mk_c_null range) in
c_to_python_boundary ~on_null:check_null left man flow range >>$ (fun py_left flow ->
if compare_expr py_left (mk_c_null range) = 0 then Eval.singleton (mk_int (-1) range) flow
else
c_to_python_boundary ~on_null:check_null right man flow range >>$ fun py_right flow ->
if compare_expr py_right (mk_c_null range) = 0 then Eval.singleton (mk_int (-1) range) flow
else
man.eval ~translate:"Universal" op flow >>$ fun u_op flow ->
let op = match Bot.bot_to_exn @@ ask_and_reduce man.ask (Universal.Numeric.Common.mk_int_interval_query u_op) flow with
| Finite l, Finite r when Z.compare l r = 0 -> Z.to_int l
| _ -> assert false in
let py_op = match op with
| 0 -> O_lt
| 1 -> O_le
| 2 -> O_eq
| 3 -> O_ne
| 4 -> O_gt
| 5 -> O_ge
| _ -> assert false in
let py_comp = mk_binop ~etyp:(T_py None) py_left py_op py_right range in
if f = "PyObject_RichCompareBool" then
assume ~route:(Semantic "Python") py_comp man flow
~fthen:(Eval.singleton (mk_one range))
~felse:(Eval.singleton (mk_zero range))
~fboth:(fun f1 f2 -> Eval.singleton (mk_int_interval 0 1 range) (Flow.join man.lattice f1 f2))
else
man.eval ~route:(Semantic "Python") py_comp flow >>$ fun py_result flow ->
let py_result_addr, py_result_oe = object_of_expr py_result in
python_to_c_boundary py_result_addr None py_result_oe range man flow
)
|> OptionExt.return
| E_c_builtin_call ("PyObject_IsTrue", [v]) ->
c_to_python_boundary v man flow range >>$ (fun py_v flow ->
assume ~route:(Semantic "Python") (Python.Utils.mk_builtin_call "bool" [py_v] range) man flow
~fthen:(Eval.singleton (mk_one range))
~felse:(Eval.singleton (mk_zero range))
) |> OptionExt.return
(**
Humf, tuples are immutable Python side but mutable on the C side.
So we'll not reuse the python domain for PyTuple_New and PyTuple_SetItem.
Additionnally, you can make some pretty buggy things if you call PyTuple_New and return the result to Python, and try and access it in Python... woops
This applies to PyTuple_New and PyTuple_SetItem
*)
| E_c_builtin_call ("PyTuple_New", [size]) ->
man.eval ~translate:"Universal" size flow >>$ (fun size flow ->
let size_itv = ask_and_reduce man.ask (Universal.Numeric.Common.mk_int_interval_query size) flow in
let size = match size_itv with
| Nb (Finite l, Finite u) when Z.equal l u -> Z.to_int l
| _ -> panic_at range "PyTuple_New, got %a" ItvUtils.IntItv.fprint_bot size_itv in
alloc_py_addr man (Python.Objects.Tuple.A_py_tuple size) range flow >>$ fun tuple_eaddr flow ->
python_to_c_boundary (Addr.from_expr tuple_eaddr) None None range man flow >>$ fun c_addr flow ->
let els_var = Python.Objects.Tuple.Domain.var_of_addr (Addr.from_expr tuple_eaddr) in
let post = List.fold_left (fun post vari ->
post >>% man.exec ~route:(Semantic "Python") (mk_add_var vari range)) (Post.return flow) els_var in
post >>% Eval.singleton c_addr
)
|> OptionExt.return
| E_c_builtin_call ("PyTuple_SetItem", [tuple;pos;item]) ->
let pos = Z.to_int @@ OptionExt.none_to_exn @@ c_expr_to_z pos flow in
c_to_python_boundary tuple man flow range >>$ (fun tuple_obj flow ->
let tuple_vars = Python.Objects.Tuple.Domain.var_of_eobj tuple_obj in
c_to_python_boundary item man flow range
~on_top:(fun flow ->
Eval.singleton (mk_top (T_py None) range) flow
)
>>$ fun item_obj flow ->
if (pos >= 0 && pos < List.length tuple_vars) then
man.exec ~route:(Semantic "Python") (mk_assign (mk_var ~mode:(Some STRONG) (List.nth tuple_vars pos) range) item_obj range) flow >>%
Eval.singleton (mk_zero range)
else
Eval.singleton (mk_int (-1) range) flow) |> OptionExt.return
| E_c_builtin_call ("PyObject_Repr", [arg]) ->
c_to_python_boundary arg man flow range >>$ (fun arg_obj flow ->
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (Python.Addr.find_builtin_function "repr") range)
[arg_obj] range) flow >>$
(
fun earg flow ->
let addr_earg = fst @@ object_of_expr earg in
python_to_c_boundary addr_earg None (snd @@ object_of_expr earg) range man flow
)
)
|> OptionExt.return
| E_c_builtin_call ("PyObject_Size", [arg])
| E_c_builtin_call ("PyObject_Length", [arg])
| E_c_builtin_call ("PySet_Size", [arg])
| E_c_builtin_call ("PyList_Size", [arg])
| E_c_builtin_call ("PyTuple_Size", [arg])
| E_c_builtin_call ("PyDict_Size", [arg]) ->
c_to_python_boundary arg man flow range >>$
(fun arg_value flow ->
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (Python.Addr.find_builtin_function "len") range)
[arg_value] range) flow >>$
(
fun earg flow ->
let size = OptionExt.none_to_exn @@ snd @@ object_of_expr earg in
Eval.singleton size flow
)
)
|> OptionExt.return
| E_c_builtin_call ("PyTuple_GetSlice", [tuple; start; stop]) ->
(
debug "%a" pp_expr exp;
resolve_c_pointer_into_addr tuple man flow >>$
fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
let py_tuple = Python.Ast.mk_py_object (addr, None) range in
c_int_to_python start man flow start.erange >>$
fun py_start flow ->
debug "py_start = %a" pp_expr py_start;
c_int_to_python stop man flow stop.erange >>$
fun py_stop flow ->
debug "py_stop = %a" pp_expr py_stop;
man.eval
(mk_expr (Python.Ast.E_py_slice_subscript
(py_tuple, py_start, py_stop, Python.Ast.mk_py_none range))
range)
flow >>$
fun py_slice flow ->
debug "resulting slice: %a" pp_expr py_slice;
let addr_py_slice, oe_py_slice = object_of_expr py_slice in
python_to_c_boundary addr_py_slice None oe_py_slice range man flow
)
|> OptionExt.return
| E_c_builtin_call ("PyList_New", [size]) ->
man.eval ~translate:"Universal" size flow >>$ (fun size flow ->
alloc_py_addr man Python.Objects.Py_list.A_py_list range flow >>$ fun list_eaddr flow ->
python_to_c_boundary (Addr.from_expr list_eaddr) None None range man flow >>$ fun c_addr flow ->
let els_var = Python.Objects.Py_list.Domain.var_of_addr (Addr.from_expr list_eaddr) in
let list_length = Python.Objects.Py_list.Domain.length_var_of_addr (Addr.from_expr list_eaddr) in
man.exec ~route:(Semantic "Python") (mk_add_var els_var range) flow >>%
man.exec ~route:(Semantic "Universal") (mk_assign (mk_var list_length range) size range) >>%
Eval.singleton c_addr
)
|> OptionExt.return
| E_c_builtin_call ("PyObject_GetIter", [arg]) ->
resolve_c_pointer_into_addr arg man flow >>$
(fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (Python.Addr.find_builtin_function "iter") range)
[Python.Ast.mk_py_object (addr, None) range] range) flow >>$
(
fun earg flow ->
let addr_earg = fst @@ object_of_expr earg in
python_to_c_boundary addr_earg None (snd @@ object_of_expr earg) range man flow
)
)
|> OptionExt.return
| E_c_builtin_call ("PyIter_Next", [arg]) ->
resolve_c_pointer_into_addr arg man flow >>$? fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
Python.Utils.try_eval_expr man
(Python.Ast.mk_py_call
(Python.Ast.mk_py_object (Python.Addr.find_builtin_function "next") range)
[Python.Ast.mk_py_object (addr, None) range] range) flow
~on_empty:(fun exc_exp exc_name exc_msg flow ->
if exc_name = "StopIteration" then Eval.singleton (mk_c_null range) flow |> OptionExt.return
else
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun earg flow ->
let addr_earg = fst @@ object_of_expr earg in
python_to_c_boundary addr_earg None (snd @@ object_of_expr earg) range man flow
)
| E_c_builtin_call ("PySequence_GetSlice", [s; i1; i2]) ->
let pylong_fromssize_t = C.Ast.find_c_fundec_by_name "PyLong_FromSsize_t" flow in
c_to_python_boundary s man flow range >>$ (fun py_s flow ->
man.eval (mk_c_call pylong_fromssize_t [i1] range) flow >>$ fun c_i1 flow ->
c_to_python_boundary c_i1 man flow range >>$ fun py_i1 flow ->
man.eval (mk_c_call pylong_fromssize_t [i2] range) flow >>$ fun c_i2 flow ->
c_to_python_boundary c_i2 man flow range >>$ fun py_i2 flow ->
man.eval (mk_expr ~etyp:(T_py None) (Python.Ast.E_py_slice_subscript (py_s, py_i1, py_i2, Python.Ast.mk_py_none range)) range) flow >>$ fun py_res flow ->
python_to_c_boundary (fst @@ object_of_expr py_res) None (snd @@ object_of_expr py_res) range man flow
) |> OptionExt.return
| E_c_builtin_call ("PyUnicode_GetItem", [o; key])
| E_c_builtin_call ("PyList_GetItem", [o; key])
| E_c_builtin_call ("PyTuple_GetItem", [o; key]) ->
c_to_python_boundary o man flow range >>$? (fun py_o flow ->
c_int_to_python key man flow (tag_range range "key") >>$? fun py_key flow ->
Python.Utils.try_eval_expr man ~route:(Semantic "Python")
(Python.Ast.mk_py_call (Python.Ast.mk_py_attr py_o "__getitem__" range) [py_key] range) flow
~on_empty:(fun exc_exp exc_name exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun py_elem flow ->
if ekind py_elem = E_constant (C_top (T_py None)) then
let c = C.Ast.find_c_fundec_by_name "PyTuple_GetItem" flow in
man.eval (mk_top c.c_func_return range) flow
else
let addr_py_elem, oe_py_elem = object_of_expr py_elem in
materialize_builtin_val_addr addr_py_elem man range flow >>$ fun addr_py_elem flow ->
python_to_c_boundary addr_py_elem None oe_py_elem range man flow >>$ fun c_addr flow ->
man.eval c_addr flow
)
)
| E_c_builtin_call ("PyDict_GetItem", [o; key])
| E_c_builtin_call ("PyObject_GetItem", [o; key]) ->
resolve_c_pointer_into_addr o man flow >>$? fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
let py_o = Python.Ast.mk_py_object (addr, None) (tag_range range "%a" pp_addr_kind (akind addr)) in
c_to_python_boundary key man flow (tag_range range "key") >>$? fun py_key flow ->
Python.Utils.try_eval_expr man ~route:(Semantic "Python")
(Python.Ast.mk_py_call (Python.Ast.mk_py_attr py_o "__getitem__" range) [py_key] range) flow
~on_empty:(fun exc_exp exc_name exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun py_elem flow ->
let addr_py_elem, oe_py_elem = object_of_expr py_elem in
materialize_builtin_val_addr addr_py_elem man range flow >>$ fun addr_py_elem flow ->
python_to_c_boundary addr_py_elem None oe_py_elem range man flow >>$ fun c_addr flow ->
man.eval c_addr flow
)
| E_c_builtin_call ("PyDict_SetItem", [list; pos; item]) ->
resolve_c_pointer_into_addr list man flow >>$?
(fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
let py_list = Python.Ast.mk_py_object (addr, None) (tag_range range "list") in
debug "boundary pos";
c_to_python_boundary pos man flow range ~on_top:(man.eval (mk_top (T_py None) range)) >>$? fun py_obj flow ->
debug "boundary item";
c_to_python_boundary item man flow range ~on_top:(man.eval (mk_top (T_py None) range)) >>$? fun py_item flow ->
Python.Utils.try_eval_expr man ~route:(Semantic "Python")
(Python.Ast.mk_py_call (Python.Ast.mk_py_attr py_list "__setitem__" range)
[py_obj; py_item] range)
flow
~on_empty:(fun exc_exp exc_name exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_int (-1) range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun res flow ->
Eval.singleton (mk_int 0 range) flow)
)
| E_c_builtin_call ("PyList_SetItem", [list;pos;item]) ->
resolve_c_pointer_into_addr list man flow >>$?
(fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
let py_list = Python.Ast.mk_py_object (addr, None) (tag_range range "list") in
c_int_to_python pos man flow (tag_range range "pos") >>$? fun py_obj flow ->
c_to_python_boundary item man flow range >>$? fun py_item flow ->
Python.Utils.try_eval_expr man ~route:(Semantic "Python")
(Python.Ast.mk_py_call (Python.Ast.mk_py_attr py_list "__setitem__" range)
[py_obj; py_item] range)
flow
~on_empty:(fun exc_exp exc_name exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_int (-1) range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun res flow ->
Eval.singleton (mk_int 0 range) flow)
)
| E_c_builtin_call ("PyList_Append", [op;newitem]) ->
resolve_c_pointer_into_addr op man flow >>$? fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
c_to_python_boundary newitem man flow range
~on_top:(fun flow -> Eval.singleton (mk_top (T_py None) range) flow)
>>$? fun py_newitem flow ->
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_attr (Python.Ast.mk_py_object (addr, None) range) "append" range)
[py_newitem] range) flow >>$? fun _ flow ->
Eval.singleton (mk_zero range) flow
|> OptionExt.return
| E_c_builtin_call ("PyDict_New", []) ->
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (find_builtin "dict") range)
[] range) flow >>$ (fun earg flow ->
let addr_earg = fst @@ object_of_expr earg in
python_to_c_boundary addr_earg None (snd @@ object_of_expr earg) range man flow
)
|> OptionExt.return
| E_c_builtin_call ("PySlice_New", [start; stop; step]) ->
fold_c_to_python_boundary man range [start; stop; step] flow >>$? (fun o_args flow ->
Python.Utils.try_eval_expr man ~route:(Semantic "Python")
(mk_py_call (Python.Ast.mk_py_object (find_builtin "slice") range) o_args range) flow
~on_empty:(fun exc_exp exc_str exc_msg flow ->
man.eval ~route:(Semantic "Python") (mk_py_type exc_exp range) flow >>$? fun exc_typ flow ->
let exc_addr, exc_oe = object_of_expr exc_typ in
let exc_msg = Universal.Strings.Powerset.StringPower.elements exc_msg in
let setstring msg =
man.exec
(mk_c_call_stmt
(C.Ast.find_c_fundec_by_name "PyErr_SetString" flow)
[
mk_addr exc_addr range;
msg
]
range) flow
>>%
man.eval (mk_c_null range) in
Eval.join_list ~empty:(fun () -> setstring (mk_c_null range))
(List.map (fun exc_msg -> setstring (mk_c_string exc_msg range)) exc_msg)
|> OptionExt.return
)
~on_result:(fun py_res flow ->
let addr_py, oe_py = object_of_expr py_res in
python_to_c_boundary addr_py None oe_py range man flow >>$ fun c_addr flow ->
man.eval c_addr flow
)
)
| E_c_builtin_call ("PySet_New", [iterable]) ->
assume (eq iterable (mk_c_null range) range) man flow
~fthen:(fun flow ->
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (find_builtin "set") range)
[] range) flow >>$ fun earg flow ->
let addr_earg = fst @@ object_of_expr earg in
python_to_c_boundary addr_earg None (snd @@ object_of_expr earg) range man flow
)
~felse:(fun flow ->
resolve_c_pointer_into_addr iterable man flow >>$ fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_object (find_builtin "set") range)
[Python.Ast.mk_py_object (addr, None) range] range) flow >>$ fun earg flow ->
let addr_earg = fst @@ object_of_expr earg in
python_to_c_boundary addr_earg None (snd @@ object_of_expr earg) range man flow
)
|> OptionExt.return
| E_c_builtin_call ("PySet_Add", [anyset; key]) ->
resolve_c_pointer_into_addr anyset man flow >>$? fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
c_to_python_boundary key man flow range >>$? fun py_key flow ->
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_attr (Python.Ast.mk_py_object (addr, None) range) "add" range)
[py_key] range) flow >>$? fun _ flow ->
Eval.singleton (mk_zero range) flow
|> OptionExt.return
| E_c_builtin_call ("PySet_Clear", [set]) ->
resolve_c_pointer_into_addr set man flow >>$ (fun oaddr flow ->
let addr = Top.detop @@ OptionExt.none_to_exn oaddr in
if compare_addr_kind (akind addr) (akind @@ addr_of_object @@ find_builtin "set") = 0 then
man.eval (Python.Ast.mk_py_call
(Python.Ast.mk_py_attr (Python.Ast.mk_py_object (addr, None) range) "__clear__" range)
[] range) flow >>$ (fun _ flow ->
Eval.singleton (mk_zero range) flow
)
else
let pyerr_badarg = C.Ast.find_c_fundec_by_name "PyErr_BadArgument" flow in
man.exec (mk_c_call_stmt pyerr_badarg [] range) flow >>%
Eval.singleton (mk_c_null range)
) |> OptionExt.return
| E_c_builtin_call ("PyWeakref_NewRef", [refto; callback]) ->
assume (eq callback (mk_c_null range) range)
man flow
~fthen:(fun flow ->
let post =
man.ask (Python.Desugar.Import.Q_python_addr_of_module "weakref") flow >>$ fun o_a flow ->
match o_a with
| Some _ -> Post.return flow
| None ->
let open Filename in
let weakrefimport, weakrefimport_channel = Filename.open_temp_file "weakrefimport" ".py" in
let weakref_fmt = Format.formatter_of_out_channel weakrefimport_channel in
Format.fprintf weakref_fmt "import weakref@.";
close_out weakrefimport_channel;
let weakref_import = mk_stmt (S_program (Python.Frontend.parse_program [weakrefimport], None)) range in
man.exec ~route:(Semantic "Python") weakref_import flow
in
post >>% fun flow ->
man.ask (Python.Desugar.Import.Q_python_addr_of_module "weakref") flow >>$ fun oweakref flow ->
let weakref = OptionExt.none_to_exn oweakref in
c_to_python_boundary refto man flow range >>$ fun py_refto flow ->
let () = Debug.debug ~channel:"bug" "%a" (format @@ Flow.print man.lattice.print) flow in
man.eval ~route:(Semantic "Python") (mk_py_call (mk_py_attr (mk_py_object (weakref, None) range) "ref" range) [py_refto] range) flow >>$ fun py_weakref flow ->
let addr_py_weakref, _ = object_of_expr py_weakref in
python_to_c_boundary addr_py_weakref None None range man flow
)
~felse:(fun flow -> assert false)
|> OptionExt.return
| E_c_builtin_call ("PyDict_Next", [p; ppos; pkey; pvalue]) ->
let py_ssize_t = C.Ast.ul in
man.exec (mk_assign (mk_c_deref ppos range) (mk_top py_ssize_t range) range) flow >>% (fun flow ->
c_to_python_boundary p man flow range >>$ fun py_p flow ->
let els = ask_and_reduce man.ask (Python.Objects.Constant_dict.Q_py_dict_items py_p) flow in
let assigns = List.map (fun (k, v) ->
let ok = object_of_expr k and ov = object_of_expr v in
python_to_c_boundary (fst ok) None (snd ok) range man flow >>$ fun c_k flow ->
python_to_c_boundary (fst ov) None (snd ov) range man flow >>$ fun c_v flow ->
man.exec (mk_block
[mk_assign (mk_c_deref pkey range) c_k range;
mk_assign (mk_c_deref pvalue range) c_v range]
range) flow >>% Eval.singleton (mk_one range)) els in
Eval.join_list ~empty:(fun () -> assert false)
(Eval.singleton (mk_zero range) flow :: assigns)
) |> OptionExt.return
| E_c_builtin_call ("PyWeakref_GetObject", [wkref]) ->
c_to_python_boundary wkref man flow range >>$ (fun py_wkref flow ->
man.eval ~route:(Semantic "Python") (mk_py_call (mk_py_attr py_wkref "__call__" range) [] range) flow >>$ fun py_ref flow ->
let addr_py_ref, oe_py_ref = object_of_expr py_ref in
python_to_c_boundary addr_py_ref None oe_py_ref range man flow)
|> OptionExt.return
| E_c_builtin_call ("PyErr_NewException", [name; base; dict]) ->
safe_get_name_of name man flow >>$ (fun name flow ->
let name = Top.detop @@ OptionExt.none_to_exn name in
let name = List.hd @@ List.tl @@ String.split_on_char '.' name in
c_to_python_boundary base man flow range >>$ (fun py_base flow ->
let py_dict_cases = c_to_python_boundary ~on_null:(fun flow -> Eval.singleton (mk_expr ~etyp:(T_py None) (E_py_dict ([], [])) range) flow) dict man flow range >>$ (fun py_dict flow -> Eval.singleton py_dict flow) in
py_dict_cases >>$ fun py_dict flow ->
man.eval ~route:(Semantic "Python") (mk_py_call (mk_py_object (find_builtin "type") range) [mk_string ~etyp:(T_py None) name range; mk_expr ~etyp:(T_py None) (E_py_tuple [py_base]) range; py_dict] range) flow >>$ fun py_cls flow ->
let addr_py_cls, oe_py_cls = object_of_expr py_cls in
python_to_c_boundary addr_py_cls None oe_py_cls range man flow))
|> OptionExt.return
| E_py_call ({ekind = E_py_object ({addr_kind = A_py_c_function(name, uid, kind, oflags, self)}, _)}, args, kwargs) ->
debug "%s, kind = %s, self = %a: oflags = %a" name (str_of_py_c_function_kind kind) Python.Pp.pp_py_object self (OptionExt.print Format.pp_print_int) oflags;
(if not @@ List.for_all (fun e -> match ekind e with | E_py_object _ -> true | _ -> false) args then bind_list args man.eval flow else bind_list args Eval.singleton flow) >>$ (fun args flow ->
let ometh_varargs = Some 1 in
let ometh_varargs_keywords = Some 3 in
let ometh_o = Some 8 in
let ometh_noargs = Some 4 in
let cfunc = find_c_fundec_by_uid uid flow in
let args_types = List.map vtyp cfunc.c_func_parameters in
let subst_addr_eobj a' e = match ekind e with
| E_py_object(a, oe) -> {e with ekind = E_py_object(a', oe)}
| _ -> assert false in
(if kind = Builtin_function_or_method then
let () = debug "builtin, nothing to do" in
Cases.singleton () flow
else
assume (mk_py_isinstance (List.hd args) (mk_py_object self range) range) man flow
~fthen:(fun flow ->
Flow.add_safe_check Python.Alarms.CHK_PY_TYPEERROR range flow |> Cases.singleton ())
~felse:(fun flow ->
man.exec (Python.Utils.mk_builtin_raise_msg "TypeError" (Format.asprintf "%s requires a %a object" name Python.Pp.pp_py_object self) range) flow >>%
Cases.empty
)
) >>$ fun _ flow ->
(match (fst self).addr_kind with
| A_py_c_class v ->
let pyobject_typ, pytypeobject_typ =
let assign_helper = C.Ast.find_c_fundec_by_name "_PyType_Assign_Helper" flow in
under_pointer_type @@ vtyp @@ List.hd assign_helper.c_func_parameters,
under_pointer_type @@ vtyp @@ List.hd @@ List.tl assign_helper.c_func_parameters in
py_addr_to_c_expr (fst self) pytypeobject_typ range man flow
| _ ->
if List.length args = 0 then Eval.singleton (mk_c_null range) flow
else
materialize_builtin_val_addr (fst self) man (tag_range range "self") flow >>$ fun addr_self flow ->
python_to_c_boundary addr_self (Some (List.hd args_types)) (snd self) range man flow
) >>$ (fun self flow ->
(match kind with
| Builtin_function_or_method ->
Cases.return (self, args) flow
| Wrapper_descriptor _ | Method_descriptor ->
if List.length args > 0 then
materialize_builtin_val_addr (fst @@ object_of_expr @@ List.hd args) man (tag_range range "_descr") flow >>$ fun fst_arg flow ->
python_to_c_boundary fst_arg None (snd @@ object_of_expr @@ List.hd args) range man flow >>$ fun c_addr flow ->
Cases.return (subst_addr_eobj (Addr.from_expr c_addr) (List.hd args), List.tl args) flow
else
Cases.return (mk_c_null range, []) flow
)
>>$ fun (self, args) flow ->
(if oflags = None || Stdlib.compare ometh_varargs oflags = 0 || Stdlib.compare ometh_varargs_keywords oflags = 0 then
Eval.singleton (mk_expr ~etyp:(T_py None) (E_py_tuple args) (tag_range range "args assignment" )) flow
else if Stdlib.compare ometh_o oflags = 0 then
let () = debug "METH_O, keeping only first argument" in
if List.length args > 0 then
Eval.singleton (List.hd args) flow
else
man.exec (Python.Utils.mk_builtin_raise_msg "TypeError" (Format.asprintf "%s takes exactly one argument (%d given)" name (List.length args)) range) flow >>% Eval.empty
else if Stdlib.compare ometh_noargs oflags = 0 then
let () = debug "METH_NOARGS, hopefully caught later on?" in
if List.length args = 0 then
Eval.singleton (mk_c_null range) flow
else
man.exec (Python.Utils.mk_builtin_raise_msg "TypeError" (Format.asprintf "%s takes no argument (%d given)" name (List.length args)) range) flow >>% Eval.empty
else
let () = debug "oflags = %a" (OptionExt.print Format.pp_print_int) oflags in
assert false
) >>$ (fun py_args flow ->
debug "%s, self is %a, args: %a" name pp_expr self pp_expr py_args;
let py_kwds =
if name = "tp_new_wrapper" || name = "wrap_init" || Stdlib.compare ometh_varargs_keywords oflags = 0 then
let keys, values = List.map (fun (so, e) -> mk_string ~etyp:(T_py None) (OptionExt.none_to_exn so) range, e) kwargs |> List.split in
mk_expr ~etyp:(T_py None) (E_py_dict (keys, values)) (tag_range range "kwargs assignment")
else
mk_c_null range
in
man.eval py_args flow >>$ (fun py_args flow ->
man.eval py_kwds flow >>$ fun py_kwds flow ->
let cfunc_args =
match List.length cfunc.c_func_parameters with
| 0 -> []
| 1 -> [self]
| 2 ->
self ::
{py_args with etyp = (List.nth args_types 1)} :: []
| 3 -> self ::
{py_args with etyp = (List.nth args_types 1)}
:: py_kwds :: []
| _ -> assert false in
let call = match kind with
| Wrapper_descriptor (Some wrapper_name) ->
let wrapper = C.Ast.find_c_fundec_by_name wrapper_name flow in
debug "wrapper %s has %d args@.cfunc_args = %a" wrapper_name (List.length wrapper.c_func_parameters) (Format.pp_print_list pp_expr) cfunc_args;
let wrapper_args =
match List.length wrapper.c_func_parameters with
| 2 ->
let self = List.hd cfunc_args in
self ::
(mk_c_address_of (mk_expr (E_c_function cfunc) range ~etyp:(mk_c_fun_typ cfunc)) range) :: []
| (3 | 4) as count ->
let self, args, kwds_or_nothing = match cfunc_args with
| [a] -> a, mk_c_null range, []
| [a;b] -> a,b,[]
| a::b::c -> a, b, c
| _ -> assert false in
self :: args ::
(mk_c_address_of (mk_expr (E_c_function cfunc) range ~etyp:(mk_c_fun_typ cfunc)) range) ::
(if count = 3 then [] else kwds_or_nothing)
| _ -> assert false
in
mk_c_call wrapper wrapper_args range
| _ ->
mk_c_call cfunc cfunc_args range
in
let caller, args = match ekind call with
| E_call (caller, args) -> caller, args
| _ -> assert false in
(
List.fold_left (fun eval arg ->
eval >>$ fun args flow ->
match ekind arg with
| E_addr (a, _) ->
debug "[%s] applying boundary on %a" name pp_addr a;
let addr_typ = match etyp arg with | T_addr -> None | t -> Some t in
python_to_c_boundary a addr_typ None arg.erange man flow >>$ fun c_arg flow ->
Cases.return ({c_arg with etyp = etyp arg}::args) flow
| E_py_object (a, oe) ->
debug "[%s] applying boundary on (%a, %a)" name pp_addr a (OptionExt.print pp_expr) oe;
let addr_typ = match etyp arg with | T_py _ -> None | t -> Some t in
python_to_c_boundary a addr_typ oe arg.erange man flow >>$ fun c_arg flow ->
Cases.return (c_arg::args) flow
| _ -> Cases.return (arg::args) flow
)
(Cases.return [] flow)
args
) >>$ fun revargs flow ->
let call = {call with ekind = E_call(caller, List.rev revargs)} in
let open C.Common.Points_to in
debug "call = %a" pp_expr call;
man.eval ~route:(Semantic "C") call flow >>$
fun call_res flow ->
debug "call result %s %a" name pp_expr call_res;
let r = c_to_python_boundary ~safe_check:(Some Python.Alarms.CHK_PY_SYSTEMERROR) call_res man flow range
~on_null:(fun flow -> check_consistent_null cfunc.c_func_org_name man flow range) in
let clear = C.Ast.find_c_fundec_by_name "PyErr_Clear" flow in
r >>$ fun r flow ->
assume (eq (mk_c_arrow_access_by_name (mk_var (search_c_globals_for flow "exc") range) "exc_state" range) (mk_c_null range) range) man flow
~fthen:(fun flow ->
debug "alles gut";
Flow.add_safe_check Python.Alarms.CHK_PY_SYSTEMERROR range flow |>
man.exec (mk_expr_stmt (mk_c_call clear [] range) range) >>%
Eval.singleton r)
~felse:(fun flow ->
debug "woopsie";
man.exec (mk_expr_stmt (mk_c_call clear [] range) range) flow >>%
man.exec (Python.Utils.mk_builtin_raise_msg "SystemError" (Format.asprintf "%s returned a result with an error set" name) range) >>%
Eval.empty
)
)
)
)
)
|> OptionExt.return
(** member descriptors: attr get/set on descriptors defined in C classes *)
| E_py_call ({ekind = E_py_object ({addr_kind = A_py_function (F_builtin ("member_descriptor.__get__", "wrapper_descriptor"))}, _)},
member_descr_instance ::
inst ::
cls_inst :: [],
kwargs) ->
debug "member_get";
let cfunc = find_c_fundec_by_name "member_get" flow in
let addr_of_object ?(etyp=T_addr) x = mk_addr ~etyp:etyp (addr_of_object @@ object_of_expr x) range in
let descr_typ, inst_typ, cls_typ = match cfunc.c_func_parameters with
| [a;b;c] -> vtyp a, vtyp b, vtyp c
| _ -> assert false in
let addr_inst = addr_of_object ~etyp:inst_typ inst in
(
py_addr_to_c_expr (fst @@ object_of_expr cls_inst) cls_typ range man flow >>$ fun c_cls_inst flow ->
py_addr_to_c_expr (fst @@ object_of_expr member_descr_instance) (under_type descr_typ) range man flow >>$ fun c_descriptor flow ->
let cfunc_args = [c_descriptor; addr_inst; c_cls_inst] in
let call = mk_c_call cfunc cfunc_args range in
debug "[%a] calling %a" pp_expr exp pp_expr call;
c_to_python_boundary ~safe_check:(Some Python.Alarms.CHK_PY_SYSTEMERROR) call man flow range
~on_null:(fun flow -> check_consistent_null cfunc.c_func_org_name man flow range)
)
|> OptionExt.return
| E_py_call ({ekind = E_py_object ({addr_kind = A_py_function (F_builtin ("member_descriptor.__set__", "wrapper_descriptor"))}, _)},
member_descr_instance ::
({ekind = E_py_object ({addr_kind = A_py_instance _}, _)} as inst) ::
value :: [],
kwargs) ->
let cfunc = find_c_fundec_by_name "PyMember_SetOne" flow in
let descr_typ, inst_typ, value_typ = match cfunc.c_func_parameters with
| [a;b;c] -> vtyp a, vtyp b, vtyp c
| _ -> assert false in
let addr_of_eobject x = addr_of_object @@ object_of_expr x in
let addr_inst = addr_of_eobject inst in
let addr_value = addr_of_eobject value in
py_addr_to_c_expr (fst @@ object_of_expr member_descr_instance) (under_type descr_typ) range man flow >>$ (fun c_descriptor flow ->
materialize_builtin_val_addr addr_inst man (tag_range range "addr_inst") flow >>$ fun addr_inst flow ->
materialize_builtin_val_addr addr_value man (tag_range range "addr_value") flow >>$ fun addr_value flow ->
python_to_c_boundary addr_inst (Some inst_typ) (snd @@ object_of_expr inst) range man flow >>$ fun c_addr_inst flow ->
python_to_c_boundary addr_value (Some value_typ) (snd @@ object_of_expr value) range man flow >>$ fun c_addr_value flow ->
let cfunc_args = [c_addr_inst; c_descriptor; c_addr_value] in
let call = mk_c_call cfunc cfunc_args range in
assume (mk_binop ~etyp:T_c_bool call O_ge (mk_zero range) range) man flow
~fthen:(fun flow ->
man.eval (mk_py_none range) flow
)
~felse:(fun flow ->
debug "not zero in:@.%a" (format @@ Flow.print man.lattice.print) flow;
check_consistent_null cfunc.c_func_org_name man flow range
)
)
|> OptionExt.return
| _ -> None
let exec stmt man flow =
let range = srange stmt in
match skind stmt with
| S_fold ({ekind = E_addr (dst, _)}, [{ekind = E_addr (src, _)}])
| S_rename ({ekind = E_addr (src, _)}, {ekind = E_addr (dst, _)}) when is_py_addr src && is_py_addr dst ->
EquivBaseAddrs.rename_addr src dst man flow >>$ (fun c_rename_needed flow ->
if c_rename_needed then
let post = man.exec ~route:(Semantic "C") stmt flow in
let exec_value src dst =
match skind stmt with
| S_rename _ -> mk_rename src dst
| S_fold _ -> mk_fold dst [src]
| _ -> assert false in
match akind src with
| A_py_instance {addr_kind = A_py_class (C_builtin ("int" | "bool"), _)} ->
post >>% man.exec (exec_value (mk_avalue_from_pyaddr src T_int range) (mk_avalue_from_pyaddr dst T_int range) range)
| A_py_instance {addr_kind = A_py_class (C_builtin "float", _)} ->
post >>% man.exec (exec_value (mk_avalue_from_pyaddr src (T_float F_DOUBLE) range) (mk_avalue_from_pyaddr dst (T_float F_DOUBLE) range) range)
| A_py_instance {addr_kind = A_py_class (C_builtin "bytes", _)}
| A_py_instance {addr_kind = A_py_class (C_builtin "str", _)} ->
post >>% man.exec (exec_value (mk_avalue_from_pyaddr src T_string range) (mk_avalue_from_pyaddr dst T_string range) range)
| _ -> post
else
Post.return flow) >>%
man.exec ~route:(Semantic "Python") stmt
|> OptionExt.return
| _ -> None
let ask _ _ _ = None
let print_expr _ _ _ _ = ()
let print_state printer a =
pprint ~path:[Key "C/Python equivalence"] printer (pbox EquivBaseAddrs.print a)
let merge _ _ _ = assert false
end
let () = register_standard_domain(module Domain)