[klee-dev] Running Multifile Applications using Klee

[Saikat Dutta]

I got the same message:
LLVM ERROR: Code generator does not support intrinsic function
'llvm.objectsize.i32'!
So theres no existing solution to this?


On Sat, Sep 21, 2013 at 3:40 PM, Daniel Liew <daniel.liew at imperial.ac.uk>wrote:

> You're done. gzip.bc is a single LLVM module that is equivalent to the
> gzip binary. Now you just need to run KLEE on it.
>
> e.g.
>
> $ klee --libc=uclibc --posix-runtime gzip.bc --help
> KLEE: NOTE: Using model:
> /data/dev/KLEE/klee/bin-dbg/Release+Asserts/lib/libkleeRuntimePOSIX.bca
> KLEE: output directory = "klee-out-1"
> LLVM ERROR: Code generator does not support intrinsic function
> 'llvm.objectsize.i64'!
>
> I should note that this does not work on my machine because of missing
> support for a particular LLVM intrinsic function. You'll need to add
> support for it:
> http://llvm.org/docs/LangRef.html#llvm-objectsize-intrinsic
>
> A developer recently added support for another intrinsic so you could
> use this as an example ( https://github.com/ccadar/klee/pull/27 )
>
> If you get it working please consider contributing your code back to
> the project so others can benefit.
>
> Thanks,
> Dan Liew.
>
>
> On 21 September 2013 10:36, Saikat Dutta <saikatdutta.pro2011 at gmail.com>
> wrote:
> > I upgraded to python 2.7
> > "extract-bc gzip" produced gzip.bc
> > what to do next?
> >
> >
> > On Sat, Sep 21, 2013 at 2:20 PM, Daniel Liew <daniel.liew at imperial.ac.uk
> >
> > wrote:
> >>
> >> Oh I forgot to mention that if you really don't feel like upgrading
> >> you could just modify the extract-bc python script by removing the use
> >> of argparse from the main() function and setting
> >>
> >> inputFile = sys.argv[1]
> >>
> >> On 20 September 2013 17:58, Daniel Liew <daniel.liew at imperial.ac.uk>
> >> wrote:
> >> > Your python install is too old (the argparse module was introduced in
> >> > python2.7) you need python 2.7 or later. You can find your current
> >> > python version by running
> >> >
> >> > $ python --version
> >> >
> >> > I think you said you were using Ubuntu 10.04 in which case the python
> >> > version is probably 2.6.5 . Unless you have a good reason to be
> >> > running such an old version of python (or Ubuntu for that matter) you
> >> > should upgrade.
> >> >
> >> >
> >> > On 20 September 2013 17:50, Saikat Dutta <
> saikatdutta.pro2011 at gmail.com>
> >> > wrote:
> >> >> Hi,
> >> >> At the "extract-bc gzip" stage following error is produced:
> >> >>
> >> >> Traceback (most recent call last):
> >> >>   File
> >> >>
> >> >>
> "/home/saikat/Downloads/llvm_new/whole-program-llvm-llvm-gcc/extract-bc",
> >> >> line 269, in <module>
> >> >>     sys.exit(main(sys.argv))
> >> >>   File
> >> >>
> >> >>
> "/home/saikat/Downloads/llvm_new/whole-program-llvm-llvm-gcc/extract-bc",
> >> >> line 212, in main
> >> >>     import argparse
> >> >> ImportError: No module named argparse
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> On Fri, Sep 20, 2013 at 10:09 PM, Daniel Liew
> >> >> <daniel.liew at imperial.ac.uk>
> >> >> wrote:
> >> >>>
> >> >>> On 20 September 2013 17:15, Saikat Dutta
> >> >>> <saikatdutta.pro2011 at gmail.com>
> >> >>> wrote:
> >> >>> > Hi,
> >> >>> > Everything goes fine with wllvm according to the way you described
> >> >>> > in
> >> >>> > the
> >> >>> > previous mail. No errors till make step.
> >> >>>
> >> >>> If you don't tell us what the errors are we will **not** be able to
> >> >>> help you. If you see an error tell us what it is.
> >> >>>
> >> >>> > But instead of "gzip.bc" or
> >> >>> > "gzip.o.bc" , ".gzip.o.bc" is being formed.
> >> >>>
> >> >>> .gzip.o.bc is a LLVM bitcode file that corresponds to the gzip.o
> >> >>> object file (this mostly likely corresponds with gzip.c) . It is
> >> >>> **not** the finally linked executable. You are only supposed to run
> >> >>> extract-bc on the the finally linked executable (or on static
> >> >>> libraries) **not** on object files.
> >> >>>
> >> >>> I just tried this and it works fine. You should run extract-bc on
> the
> >> >>> "gzip" executable.
> >> >>>
> >> >>> # I assume you have llvm-gcc in your path and it was the pre-built
> >> >>> binary llvm-gcc 4.2
> >> >>>
> >> >>> $ export LLVM_COMPILER=llvm-gcc
> >> >>> $ export WLLVM_OUTPUT=WARNING
> >> >>> $ export
> >> >>>
> LLVM_COMPILER_PATH=/your/path/to/the/llvm2.9/build/Release+Asserts/bin
> >> >>> $ wget http://ftp.gnu.org/gnu/gzip/gzip-1.6.tar.xz
> >> >>> $ tar -xvf gzip-1.6.tar.xz
> >> >>> $ cd gzip-1.6
> >> >>> $ CC=wllvm ./configure
> >> >>> $ make -j4
> >> >>> $ extract-bc gzip
> >> >>>
> >> >>> # gzip.bc will now be in the current directory
> >> >>>
> >> >>> > When I use extract bc on it,
> >> >>> > error is generated. Please help.
> >> >>> > -Saikat
> >> >>>
> >> >>> Again... If there is an error message tell us what it is.
> >> >>>
> >> >>> Hope that helps.
> >> >>>
> >> >>> Dan.
> >> >>
> >> >>
> >
> >
>
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