package frama-c

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  2. Docs
Platform dedicated to the analysis of source code written in C

Install 

dune-project
 Dependency

frama-c.com Readme Edit opam file Versions (25)

Authors

  1. M
    Michele Alberti
  2. T
    Thibaud Antignac
  3. G
    Gergö Barany
  4. P
    Patrick Baudin
  5. T
    Thibaut Benjamin
  6. A
    Allan Blanchard
  7. L
    Lionel Blatter
  8. F
    François Bobot
  9. R
    Richard Bonichon
  10. Q
    Quentin Bouillaguet
  11. D
    David Bühler
  12. Z
    Zakaria Chihani
  13. L
    Loïc Correnson
  14. J
    Julien Crétin
  15. P
    Pascal Cuoq
  16. Z
    Zaynah Dargaye
  17. B
    Basile Desloges
  18. J
    Jean-Christophe Filliâtre
  19. P
    Philippe Herrmann
  20. M
    Maxime Jacquemin
  21. F
    Florent Kirchner
  22. A
    Alexander Kogtenkov
  23. T
    Tristan Le Gall
  24. J
    Jean-Christophe Léchenet
  25. M
    Matthieu Lemerre
  26. D
    Dara Ly
  27. D
    David Maison
  28. C
    Claude Marché
  29. A
    André Maroneze
  30. T
    Thibault Martin
  31. F
    Fonenantsoa Maurica
  32. M
    Melody Méaulle
  33. B
    Benjamin Monate
  34. Y
    Yannick Moy
  35. P
    Pierre Nigron
  36. A
    Anne Pacalet
  37. V
    Valentin Perrelle
  38. G
    Guillaume Petiot
  39. D
    Dario Pinto
  40. V
    Virgile Prevosto
  41. A
    Armand Puccetti
  42. F
    Félix Ridoux
  43. V
    Virgile Robles
  44. J
    Jan Rochel
  45. M
    Muriel Roger
  46. J
    Julien Signoles
  47. N
    Nicolas Stouls
  48. K
    Kostyantyn Vorobyov
  49. B
    Boris Yakobowski

Maintainers

  1. F
    frama-ci-bot@frama-c.com

Sources

frama-c-28.0-beta-Nickel.tar.gz
sha256=0c80dae8074fcb3f6a33d7a41faf9939a2a336478a8d2c79e20e2d7bab953735

doc/frama-c.kernel/Frama_c_kernel/Bit_utils/index.html

Module Frama_c_kernel.Bit_utils

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.

val signof_typeof_lval : Cil_types.lval -> bool
  • returns

    the sign of type of the lval. true means that the type is signed.

val sizeof_vid : Cil_types.varinfo -> Int_Base.t
  • returns

    the size of the type of the variable in bits.

val sizeof_lval : Cil_types.lval -> Int_Base.t
  • returns

    the size of the type of the left value in bits.

val sizeof_pointed : Cil_types.typ -> Int_Base.t
  • returns

    the size of the type pointed by a pointer or array type in bits. Never call it on a non pointer or non array type .

val osizeof_pointed : Cil_types.typ -> Int_Base.t
  • returns

    the size of the type pointed by a pointer or array type in bytes. Never call it on a non pointer or array type.

val sizeof_pointed_lval : Cil_types.lval -> Int_Base.t
  • returns

    the size of the type pointed by a pointer type of the lval in bits. Never call it on a non pointer type lval.

val max_bit_address : unit -> Integer.t
  • returns

    the maximal possible offset in bits of a memory base.

val max_bit_size : unit -> Integer.t
  • returns

    the maximal possible size in bits of a memory base.

val max_byte_address : unit -> Integer.t
  • returns

    the maximal possible offset in bytes of a memory base.

  • since Aluminium-20160501
val max_byte_size : unit -> Integer.t
  • returns

    the maximal possible size in bytes of a memory base.

  • since Aluminium-20160501

Pretty printing

val pretty_bits : Cil_types.typ -> use_align:bool -> align:Abstract_interp.Rel.t -> rh_size:Integer.t -> start:Integer.t -> stop:Integer.t -> 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.

Mapping from numeric offsets to symbolic ones.

val type_compatible : Cil_types.typ -> Cil_types.typ -> bool

Comparison of the shape of two types. Attributes are completely ignored.

type offset_match =
  1. | MatchType of Cil_types.typ
    (*

    Offset that has this type (modulo attributes)

    *)
  2. | MatchSize of Integer.t
    (*

    Offset that has a type of this size

    *)
  3. | 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

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.)