module Bit_utils:sig
..end
Some bit manipulations.
val sizeofchar : unit -> Integer.t
sizeof(char)
in bits
val sizeofpointer : unit -> int
sizeof(char* )
in bits
val sizeof : Cil_types.typ -> Int_Base.t
sizeof ty
is the size of ty
in bits. This function may return
Int_Base.top
.
val osizeof : Cil_types.typ -> Int_Base.t
osizeof ty
is the size of ty
in bytes. This function may return
Int_Base.top
.
exception Neither_Int_Nor_Enum_Nor_Pointer
val is_signed_int_enum_pointer : Cil_types.typ -> bool
true
means that the type is signed.
Neither_Int_Nor_Enum_Nor_Pointer
if the sign of the type is not
meaningful.val signof_typeof_lval : Cil_types.lval -> bool
lval
. true
means that the type is
signed.val sizeof_vid : Cil_types.varinfo -> Int_Base.t
val sizeof_lval : Cil_types.lval -> Int_Base.t
val sizeof_pointed : Cil_types.typ -> Int_Base.t
val osizeof_pointed : Cil_types.typ -> Int_Base.t
val sizeof_pointed_lval : Cil_types.lval -> Int_Base.t
lval
in
bits. Never call it on a non pointer type lval
.val max_bit_address : unit -> Integer.t
val max_bit_size : unit -> Integer.t
val max_byte_address : unit -> Integer.t
val max_byte_size : unit -> Integer.t
val pretty_bits : Cil_types.typ ->
use_align:bool ->
align:Abstract_interp.Rel.t ->
rh_size:Integer.t ->
start:Integer.t ->
stop:Integer.t -> Stdlib.Format.formatter -> bool * Cil_types.typ option
Pretty prints a range of bits in a type for the user. Tries to find field names and array indexes, whenever possible.
type
offset_match =
| |
MatchType of |
(* | Offset that has this type (modulo attributes) | *) |
| |
MatchSize of |
(* | Offset that has a type of this size | *) |
| |
MatchFirst |
(* | Return first symbolic offset that matches | *) |
We want to find a symbolic offset that corresponds to a numeric one, with one additional criterion:
exception NoMatchingOffset
val find_offset : Cil_types.typ ->
offset:Integer.t ->
offset_match -> Cil_types.offset * Cil_types.typ
find_offset typ ~offset ~size
finds a subtype t
of typ
that describes
the type of the bits offset..offset+size-1
in typ
. May return a subtype
of typ
, or a type that is a sub-array of an array type in typ
.
Also returns a Cil_types.offset
off
that corresponds to offset
.
(But we do not have the guarantee that typeof(off) == typ
, because of
sub-arrays.)
NoMatchingOffset
when no offset matches.