package goblint

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Static analysis framework for C

Install 

dune-project
 Dependency

goblint.in.tum.de Readme Changelog Edit opam file Versions (10)

Authors

  1. S
    Simmo Saan
  2. M
    Michael Schwarz
  3. J
    Julian Erhard
  4. S
    Sarah Tilscher
  5. K
    Karoliine Holter
  6. R
    Ralf Vogler
  7. K
    Kalmer Apinis
  8. V
    Vesal Vojdani

Maintainers

  1. S
    Simmo Saan <simmo.saan@gmail.com>
  2. M
    Michael Schwarz <michael.schwarz93@gmail.com>
  3. K
    Karoliine Holter <karoliine.holter@ut.ee>

Sources

goblint-2.4.0.tbz
sha256=99b78e6def71534d195eef9084baa26d8334b36084e120aa6afb300c9bf8afa6
sha512=f3162bd95a03c00358a2991f6152fc6169205bfb4c55e2c483e98cc3935673df9656d025b6f1ea0fa5f1bd0aee037d4f483966b0d2907e3fa9bf11a93a3392af

doc/goblint_cdomain_value/ArrayDomain/NullByte/index.html

Module ArrayDomain.NullByte

This functor creates an array representation by the indexes of all null bytes * the array must and may contain. This is useful to analyze strings, i.e. null- * terminated char arrays, and particularly to determine if operations on strings * could lead to a buffer overflow. Concrete values from Val are not interesting * for this domain. It additionally tracks the array size.

Parameters

module Idx : IntDomain.Z

Signature

include S0 with type value = Val.t with type idx = Idx.t
include Lattice.S
include Lattice.PO
include Printable.S
type 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
type idx = Idx.t

The abstract domain used to index on arrays.

type value = Val.t

The abstract domain of values stored in the array.

val set : VDQ.t -> t -> (Basetype.CilExp.t option * idx) -> value -> t

Returns a new abstract value, where the given index is replaced with the * given element.

val make : ?varAttr:GoblintCil.Cil.attributes -> ?typAttr:GoblintCil.Cil.attributes -> idx -> value -> t

make l e creates an abstract representation of an array of length l * containing the element e.

val length : t -> idx option

returns length of array if known

val move_if_affected : ?replace_with_const:bool -> VDQ.t -> t -> GoblintCil.Cil.varinfo -> (GoblintCil.Cil.exp -> int option) -> t

changes the way in which the array is partitioned if this is necessitated by a change * to the variable *

val get_vars_in_e : t -> GoblintCil.Cil.varinfo list

returns the variables occuring in the expression according to which the * array was partitioned (if any)

val map : (value -> value) -> t -> t

Apply a function to all elements of the array.

val fold_left : ('a -> value -> 'a) -> 'a -> t -> 'a

Left fold (like List.fold_left) over the arrays elements

val smart_join : (GoblintCil.Cil.exp -> IntOps.BigIntOps.t option) -> (GoblintCil.Cil.exp -> IntOps.BigIntOps.t option) -> t -> t -> t
val smart_widen : (GoblintCil.Cil.exp -> IntOps.BigIntOps.t option) -> (GoblintCil.Cil.exp -> IntOps.BigIntOps.t option) -> t -> t -> t
val smart_leq : (GoblintCil.Cil.exp -> IntOps.BigIntOps.t option) -> (GoblintCil.Cil.exp -> IntOps.BigIntOps.t option) -> t -> t -> bool
val update_length : idx -> t -> t
val project : ?varAttr:GoblintCil.Cil.attributes -> ?typAttr:GoblintCil.Cil.attributes -> VDQ.t -> t -> t
val invariant : value_invariant: (offset:GoblintCil.Cil.offset -> lval:GoblintCil.Cil.lval -> value -> Invariant.t) -> offset:GoblintCil.Cil.offset -> lval:GoblintCil.Cil.lval -> t -> Invariant.t
type ret =
  1. | Null
  2. | NotNull
  3. | Maybe
type substr =
  1. | IsNotSubstr
  2. | IsSubstrAtIndex0
  3. | IsMaybeSubstr
val get : VDQ.t -> t -> (Basetype.CilExp.t option * idx) -> ret
val to_null_byte_domain : string -> t
val to_string_length : t -> idx

Returns length of string represented by input abstract value

val string_copy : t -> t -> int option -> t

string_copy dest src n returns an abstract value representing the copy of string src * into array dest, taking at most n bytes of src if present

val string_concat : t -> t -> int option -> t

string_concat s1 s2 n returns a new abstract value representing the string * concatenation of the input abstract values s1 and s2, taking at most n bytes of * s2 if present

val substring_extraction : t -> t -> substr

substring_extraction haystack needle returns IsNotSubstr if the string represented by * the abstract value needle surely isn't a substring of haystack, IsSubstrAtIndex0 if * needle is the empty string, else IsMaybeSubstr

val string_comparison : t -> t -> int option -> idx

string_comparison s1 s2 n returns a negative / positive idx element if the string * represented by s1 is less / greater than the one by s2 or zero if they are equal; * only compares the first n bytes if present