Provided by: frama-c-base_20130601+fluorine3+dfsg-2build1_amd64 bug


       frama-c[.byte] - a static analyzer for C programs

       frama-c-gui[.byte] - the graphical interface of frama-c


       frama-c [ options ] files


       frama-c  is  a  suite  of tools dedicated to the analysis of source code written in C.  It
       gathers several static analysis techniques  in  a  single  collaborative  framework.  This
       framework  can  be  extended by additional plugins placed in the $FRAMAC_PLUGIN directory.
       The command

              frama-c -help

       will provide the full list of the plugins that are currently installed.

       frama-c-gui is the graphical user interface of frama-c.  It features the same  options  as
       the command-line version.

       frama-c.byte and frama-c-gui.byte are  the ocaml bytecode versions of the command-line and
       graphical user interface respectively.

       By default, Frama-C recognizes .c files as C files needing pre-processing and .i files  as
       C  files having been already pre-processed. Some plugins may extend the list of recognized
       files. Pre-processing can be  customized  through  the  -cpp-command  and  -cpp-extra-args



       Options taking an additional parameter can also be written under the form


       This option is mandatory when param starts with a dash ('-')

       Most options that takes no parameter have a corresponding


       option which has the opposite effect.

       Help options

       -help  gives a short usage notice and the list of installed plugins.

              prints the list of options recognized by Frama-C's kernel

       -verbose n
              Sets  verbosity  level  (default  is  1). Setting it to 0 will output less progress
              messages. This level can also be set on a per plugin basis,  with  option  -plugin-
              verbose   n.   Verbosity  level  of  the  kernel  can  be  controlled  with  option
              -kernel-verbose n.

       -debug n
              Sets debugging level (default is 0, meaning no debugging  messages).   This  option
              has the same per plugin (and kernel) specializations as -verbose.

       -quiet Sets verbosity and debugging level to 0.

       Options controlling Frama-C's kernel

       -absolute-valid-range <min-max>
              considers  that  all numerical addresses in the range min-max are valid. Bounds are
              parsed as  ocaml  integer  constants.  By  default,  all  numerical  addresses  are
              considered invalid.

       -add-path p1[,p2[...,pn]]
              adds  directories <p1> through <pn> to the list of directories in which plugins are

              allows duplication of  small  blocks  during  normalization  of  tests  and  loops.
              Otherwise,  normalization  use labels and gotos. Bigger blocks and blocks with non-
              trivial control flow are never duplicated. Defaults to yes.

              reads ACSL annotation. This is the default. Annotation  are  not  pre-processed  by
              default. Use -pp-annot for that.

       -big-ints-hex max
              integers larger than max are displayed in hexadecimal (by default, all integers are
              displayed in decimal)

       -check performs integrity checks on the internal AST (for developers only).

              allows implicit cast between the value returned by a function and the lvalue it  is
              assigned to. Otherwise, a temporary variable is used and the cast is made explicit.
              Defaults to yes.

              folds all syntactically constant expressions in the code before analyses.  Defaults
              to no.

              When analyzing an annotation, the default behavior (the -no version of this option)
              when a typechecking error occurs is to reject the source file as is  the  case  for
              typechecking  errors  within  the C code. With this option on, the typechecker will
              only output a warning and discard the annotation  but  typechecking  will  continue
              (errors in C code are still fatal, though).

       -cpp-command cmd
              Uses  cmd  as  the  command to pre-process C files. Defaults to the CPP environment
              variable or to

              gcc -C -E -I.

              if it is not set. In order to preserve ACSL annotations, the preprocessor must keep
              comments  (the  -C  option  for  gcc).   %1 and %2 can be used in cmd to denote the
              original source file and the pre-processed file respectively

       -cpp-extra-args args
              Gives  additional  arguments  to  the  pre-processor.  This  is  only  useful  when
              -preprocess-annot  is  set. Pre-processing annotations is done in two separate pre-
              processing stages. The first one is a normal pass on the C code which retains macro
              definitions.  These  are  then used in the second pass during which annotations are
              pre-processed.  args are used only for the  first  pass,  so  that  arguments  that
              should  not  be  used  twice  (such  as  additional  include  directives  or  macro
              definitions) must thus go there instead of -cpp-command.

              When on, load all the dynamic plug-ins found in the search path (see -print-plugin-
              path  for  more  information  on  the default search path). Otherwise, only plugins
              requested by -load-modules will be loaded. Default behavior is on.

       -enums repr
              Choose the way the representation  of  enumerated  types  is  determined.   frama-c
              -enums help gives the list of available options. Default is gcc-enums

       -float-digits n
              When outputting floating-point numbers, display n digits. Defaults to 12.

              Floating point operations flush to zero

              display floats as hexadecimal

              display floats with standard Ocaml routine

              display float interval as [ lower_bound++width ]

              forces  right  to  left evaluation order for arguments of function calls. Otherwise
              the evaluation order is left unspecified, as in C standard. Defaults to no.

              Do not output a journal of the current session. See -journal-enable.

              On by default, dumps a journal of all the  actions  performed  during  the  current
              Frama-C  session  in  the  form of an ocaml script that can be replayed with -load-
              script.  The name of the script can be set with the -journal-name option.

       -journal-name name
              Set the name  of  the  journal  file  (without  the  .ml  extension).  Defaults  to

              Implicit  initialization  of  locals sets padding bits to 0. If false, padding bits
              are left uninitialized (default to yes).

              Tries to preserve comments when pretty-printing the source code (defaults to no).

              When -simplify-cfg is set, keeps switch statements. Defaults to no.

              See -remove-unused-specified-functions

              Indicates that the entry point is called during program execution. This implies  in
              particular  that  global variables can not be assumed to have their initial values.
              The default is -no-lib-entry: the entry point is also the  starting  point  of  the
              program and globals have their initial value.

       -load file
              load the (previously saved) state contained in file.

       -load-module m1[,m2[...,mn]]
              loads the ocaml modules <m1>through <mn>.  These modules must be .cmxsfiles for the
              native code version of Frama-c and .cmoor.cmafiles for the  bytecode  version  (see
              the  Dynlink  section  of Ocaml manual for more information). All modules which are
              present in the plugin search paths are automatically loaded.

       -load-script s1[,s2,[...,sn]]
              loads the ocaml scripts <s1> through <sn>.  The scripts  must  be  .mlfiles.   They
              must  be  compilable  relying  only on Ocaml standard library and Frama-C's API. If
              some custom compilation step is needed, compile them outside  of  Frama-C  and  use
              -load-module instead.

       -machdep machine
              uses  machine  as  the current machine-dependent configuration (size of the various
              integer types, endiandness, ...). The  list  of  currently  supported  machines  is
              available through -machdep help option. Default is x86_32

       -main f
              Sets  f  as  the entry point of the analysis. Defaults to 'main'. By default, it is
              considered as the starting point of the program under analysis. Use -lib-entry if f
              is supposed to be called in the middle of an execution.

              prints  an  obfuscated version of the code (where original identifiers are replaced
              by meaningless one) and exits. The correspondance table between  original  and  new
              symbols is kept at the beginning of the result.

       -ocode file
              redirects pretty-printed code to file instead of standard output.

              During  the  normalization  phase,  some  variables  may get renamed when different
              variable with the same name can co-exist (e.g.  a  global  variable  and  a  formal
              parameter).  When  this  option  is on, a message is printed each time this occurs.
              Defaults to no.

              generate alarms when signed downcasts may exceed the destination range (default  to

              generate alarms for signed operations that overflow (default to yes).

              generate  alarms  when unsigned downcasts may exceed the destination range (default
              to no).

              generate alarms for unsigned operations that overflow (default to no).

              pre-process annotations. This is currently only possible when  using  gcc  (or  GNU
              cpp) pre-processor. The default is to not pre-process annotations.

              pretty-prints the source code as normalized by CIL (defaults to no).

              outputs the directory where Frama-C kernel library is installed

              alias of -print-share-path

              outputs  the  directory where Frama-C searches its plugins (can be overidden by the
              FRAMAC_PLUGIN variable and the -add-path option)

              outputs the directory where Frama-C stores  its  data  (can  be  overidden  by  the
              FRAMAC_SHARE variable)

              keeps  function  prototypes that have an ACSL specification but are not used in the
              code. This is the default. Functions having the attribute FRAMAC_BUILTIN are always

              For multidimensional arrays or arrays that are fields inside structs , assumes that
              all accesses must be in bound (set by default). The  opposite  option  is  -unsafe-

       -save file
              Saves Frama-C's state into file after analyses have taken place.

              removes break, continue and switch statement before analyses. Defaults to no.

       -then  allows  one to compose analyzes: a first run of Frama-C will occur with the options
              before -then and a second run will be done with the  options  after  -then  on  the
              current project from the first run.

       -then-on prj
              Similar  to -then except that the second run is performed in project prj If no such
              project exists, Frama-C exits with an error.

       -time file
              appends user time and date in the given file when Frama-C exits.

              forces typechecking of the source files. This option is only relevant if no further
              analysis  is requested (as typechecking will implicitely occurs before the analysis
              is launched).

       -ulevel n
              syntactically unroll loops n times before the analysis. This can  be  quite  costly
              and  some plugins (e.g.  the value analysis) provide more efficient ways to perform
              the same thing.  See their respective manuals for more information. This  can  also
              be  activated  on  a  per-loop  basis  via  the loop pragma unroll <m> directive. A
              negative value for n will inhibit such pragmas.

              outputs ACSL formulas with utf8 characters. This is the  default.  When  given  the
              -no-unicode option, Frama-C will use the ASCII version instead. See the ACSL manual
              for the correspondance.

              see -safe-arrays

              checks that read/write accesses occuring in unspecified order (according to  the  C
              standard's  notion  of  sequence  point) are performed on separate locations.  With
              -no-unspecified-access, assumes that it is always the case (this is the default).

              outputs the version string of Frama-C

       -warn-decimal-float <freq>
              warns when a floating-point constant cannot  be  exactly  represented  (e.g.  0.1).
              <freq> can be one of none, once, or all

              warns  when  a  function  is  called  before it has been declared (set by default).

       Plugins specific options

       For each plugin, the command

              frama-c -plugin-help

       will give the list of options that are specific to the plugin.


       0      Successful execution

       1      Invalid user input

       2      User interruption (kill or equivalent)

       3      Unimplemented feature

       4 5 6  Internal error

       125    Unknown error

       Exit status greater than 2 can be considered as a bug (or a feature request for  the  case
       of exit status 3) and may be reported on Frama-C's BTS (see below).


       It  is  possible  to  control  the  places  where  Frama-C looks for its files through the
       following variables.

              The directory where kernel's compiled interfaces are installed

              The directory where Frama-C can find standard plug-ins. If you wish to have plugins
              in several places, use -add-path instead.

              The directory where Frama-C datas are installed.


       Frama-C user manual: $FRAMAC_SHARE/manuals/user-manual.pdf

       Frama-C homepage:

       Frama-C BTS:

                                            2013-04-17                                 FRAMA-C(1)