package goblint

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Static analysis framework for C

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goblint.in.tum.de Edit opam file Versions (8)

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goblint-2.5.0.tbz

sha256=452d8491527aea21f2cbb11defcc14ba0daf9fdb6bdb9fc0af73e56eac57b916

sha512=1993cd45c4c7fe124ca6e157f07d17ec50fab5611b270a434ed1b7fb2910aa85a8e6eaaa77dad770430710aafb2f6d676c774dd33942d921f23e2f9854486551

doc/goblint_cdomain_value/AddressDomain/AddressLattice/index.html

Module `AddressDomain.AddressLattice`

Address lattice.

Actually a disjoint union of lattices without top or bottom. Addresses are grouped as follows:

Each Addr, modulo precise index expressions in the offset, is a sublattice with ordering induced by Mval.
NullPtr is a singleton sublattice.
UnknownPtr is a singleton sublattice.
If ana.base.strings.domain is disjoint, then each StrPtr is a singleton sublattice. Otherwise, all StrPtr are together in one sublattice with flat ordering.

Parameters

module Mval : Mval.Lattice

Signature

include sig ... end

type t = AddressBase(Mval).t =

| Addr of Mval.t
(*
Pointer to mvalue.
*)
| NullPtr
(*
NULL pointer.
*)
| UnknownPtr
(*
Unknown pointer. Could point to globals, heap and escaped variables.
*)
| StrPtr of StringDomain.t
(*
String literal pointer. StrPtr None abstracts any string pointer
*)

val of_string : string -> t

Convert string to StrPtr.

val to_string : t -> string option

Convert StrPtr to string if possible.

val to_c_string : t -> string option

Convert StrPtr to C string if possible.

val to_n_c_string : int -> t -> string option

Convert StrPtr to C string of given maximum length if possible.

val to_string_length : t -> int option

Find length of C string if possible.

val is_definite : t -> bool

Whether address is a NULL pointer or an mvalue that has only definite integer indexing (and fields).

val add_offset : t -> Mval.idx Offset.t -> t

add_offset a o appends o to an mvalue address a.

val of_var : GoblintCil.varinfo -> t

Convert from variable (without offset).

val of_mval : Mval.t -> t

Convert from mvalue.

val to_var : t -> GoblintCil.varinfo option

Convert to variable if possible.

val to_var_may : t -> GoblintCil.varinfo option

Convert to variable with any offset if possible.

val to_var_must : t -> GoblintCil.varinfo option

Convert to variable without offset if possible.

val to_mval : t -> Mval.t option

Convert to mvalue if possible.

val to_exp : t -> GoblintCil.exp

Convert to CIL expression.

val type_of : t -> GoblintCil.typ

Type of address.

include Lattice.S with type t := t

include Lattice.PO with type t := t

include Printable.S with type t := t

val equal : t -> t -> bool

val hash : t -> int

val compare : t -> t -> int

val show : t -> string

val pretty : unit -> t -> Printable.Pretty.doc

val printXml : 'a BatInnerIO.output -> t -> unit

val name : unit -> string

val to_yojson : t -> Yojson.Safe.t

val tag : t -> int

Unique ID, given by HConsed, for context identification in witness

val arbitrary : unit -> t QCheck.arbitrary

val relift : t -> t

val leq : t -> t -> bool

val join : t -> t -> t

val meet : t -> t -> t

val widen : t -> t -> t

widen x y assumes leq x y. Solvers guarantee this by calling widen old (join old new).

val narrow : t -> t -> t

val pretty_diff : unit -> (t * t) -> Lattice.Pretty.doc

If leq x y = false, then pretty_diff () (x, y) should explain why.

val bot : unit -> t

val is_bot : t -> bool

val top : unit -> t

val is_top : t -> bool

val top_indices : t -> t

Change all indices to top indices.

val semantic_equal : t -> t -> bool option

Check semantic equality of two addresses.

returns
Some true if definitely equal, Some false if definitely not equal, None if unknown.

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Parameters
Signature