llvm dev - Jun 2005 - [LLVMdev] Randomizing Functions & Global variables

By randomization of functions I mean the manner in whch they are called , so
that has to do with address.I wish to randomize the order of calls made to
functions when a program is run.

Reid Spencer <reid at x10sys.com> wrote:Can you explain a little bit more
about what you mean by "randomize"
functions or global variables? What aspect of them do you want to
randomize? Their address? Their value? Something else?

Reid.

On Thu, 2005-06-02 at 13:53 -0700, Tanu Sharma wrote:
> I would try that ..Thanks
> 
> Another thing that I want to do is to randomize functions within a
> program (or file ), whatever is easier to do in llvm .Also please tell
> me how can I randomize global variables ?
> 
> Thanks
> TS
> 
> 
> Chris Lattner wrote:
> On Mon, 30 May 2005, Tanu Sharma wrote:
> 
> > I have been trying to compile the SPEC benchmark but have
> failed even 
> > after several attempts.The first error I get while trying to
> run is :
> 
> There are two ways to do this:
> 
> 1. Use the llvm-test harness
> 2. Use the official spec harness with -Wl,-native-cbe or -Wl,-
> native flags
> to llvm-gcc.
> 
> -Chris
> 
> >
> --------------------------------------------------------------------
> >
> > Error loading program '../00000002/gzip_base.x86_linux.bc':
> Can't open file: ../00000002/gzip_base.x86_linux.bc
> >
> >
> -----------------------------------------------------------------------
> >
> >
> >
> > Has anyone tried doing this ?Could you please tell me the
> changes required to compile it with llvm.
> >
> >
> >
> > Thanks
> >
> > TS
> >
> >> ---------------------------------
> > Yahoo! Mail Mobile
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> -Chris
> 
> -- 
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On Thu, Jun 02, 2005 at 02:12:22PM -0700, Tanu Sharma
wrote:
> By randomization of functions I mean the manner in whch they are
> called , so that has to do with address.I wish to randomize the order
> of calls made to functions when a program is run.
How would you "randomize the order of calls made to functions when a
program is run" without changing the semantics of the program?

-- 
Misha Brukman :: http://misha.brukman.net :: http://llvm.cs.uiuc.edu

>> By randomization of functions I mean the manner in whch they are
>> called , so that has to do with address.I wish to randomize the order
>> of calls made to functions when a program is run.
> 
> How would you "randomize the order of calls made to functions when a
> program is run" without changing the semantics of the program?
By using dummy functions ?

Aaron

Hi all...

I understand that while LLVM provides no support for threading itself, it 
should be quite possible to run multiple JIT ExecutionEngines in separate OS 
threads.
My intention is to have several threads running in parallel, to utilise 
particular hardware effectively - so I wonder if it is possible to share 
memory directly between ExecutionEngines? Particularly I'm looking at doing 
signal processing that would pass large buffers on a regular basis, so 
copying isn't an option - anyone have any idea if this will work?

Thanks,
David Shipman

Ms Brukman, 
 
Thanks for your reply.Just clarifying my question.I actually wanted to randomize
the static layout of function code in the executable file.Sorry for writing in
confusing manner.
 
T

Misha Brukman <brukman at cs.uiuc.edu> wrote:
On Thu, Jun 02, 2005 at 02:12:22PM -0700, Tanu Sharma
wrote:
> By randomization of functions I mean the manner in whch they are
> called , so that has to do with address.I wish to randomize the order
> of calls made to functions when a program is run.
How would you "randomize the order of calls made to functions when a
program is run" without changing the semantics of the program?

-- 
Misha Brukman :: http://misha.brukman.net :: http://llvm.cs.uiuc.edu

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