llvm dev - Jun 2017 - Compiling program with dfsan at IR

Hi,

I am trying to instrument a small program with dfsan at IR and then compile
it. But I end up with undefined reference errors.

Steps taken:
1.Convert toy program to .bc
2. IR pass to insert dfsan calls
3.opt -dfsan on resultant bitcode from step 2
4. llc step3.bc -o step4.s
5. gcc step.s -o step5.o

I get error  "undefined reference to `__dfsan_arg_tls' " and so
forth for
all functions defined.
Is there something I am missing or doing wrong in my steps.

Thanks
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Programs compiled with dfsan require a runtime library in order to work
correctly. You will need to link your program with "clang
-fsanitize=dataflow".

Peter

On Fri, Jun 2, 2017 at 12:46 AM, Archa . via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi,
>
> I am trying to instrument a small program with dfsan at IR and then
> compile it. But I end up with undefined reference errors.
>
> Steps taken:
> 1.Convert toy program to .bc
> 2. IR pass to insert dfsan calls
> 3.opt -dfsan on resultant bitcode from step 2
> 4. llc step3.bc -o step4.s
> 5. gcc step.s -o step5.o
>
> I get error  "undefined reference to `__dfsan_arg_tls' " and
so forth for
> all functions defined.
> Is there something I am missing or doing wrong in my steps.
>
> Thanks
>
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>

-- 
-- 
Peter
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