[klee-dev] How to introduce the "Exploration Technique" concept

[Alberto Barbaro]

Hi all,
thanks for the answer. I was able to create another searcher called
"guided" that should do what i want but I have problem for now. From my
understanding the crucial function to implement are: update and selectState.

I think in the selectState function I should return *states[0] or
*states[1] depending if in the condition is false or true. I'm not sure
that the first state represents the false condition so please let me know
if I'm wrong. Instead, within the update function I should remove all the
states apart states[0] or states[1] depending on the content of the file
again.

Unfortunately I'm not sure that if my idea is correct. Can someone let me
know what I'm missing and maybe give me an example?

Thanks
Alberto

On Sun, Mar 18, 2018, 19:31 Cristian Cadar <c.cadar at imperial.ac.uk> wrote:

> My recommendation is to implement such an exploration technique as an
> independent search heuristic.  The bar for changing the core of KLEE is
> much higher, as it affects all users.
>
> Best,
> Cristian
>
> On 18/03/2018 17:41, Alberto Barbaro wrote:
> > Hi,
> > I'm working on a possible PULL request that would allow to execute a
> > project but excluding paths based on a .path previously generated using
> > KLEE. Doing so it would be possible to have some sort of "exploration
> > technique" that would help to follow specific paths.
> >
> > I think, after having generated the .path file, it would be possible to
> > do so amending Executor.cpp main switch for the Instruction::Br case.
> > I'm able to keep track of the "index" for the current branch so I would
> > check cond.get().isTrue() comparing with value on line "index". At this
> > point I'm not sure how to skip a branch ( I cannot use exit(0) like
> > klee_silent_exit I think ). Should I just modify the if for the "br"
> > branch of the switch?
> >
> > Thanks for any suggesiton,
> > A
> >
> >
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>
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