[LLVMdev] Compiling glibc with LLVM

[James Molloy]

Hi Nipun,

 

I'm afraid I don't know the state of LLVM's alias analysis. Hopefully
someone more knowledgeable on the list can inform you.

 

Cheers,

 

James

 

From: Nipun Arora [mailto:nipun2512 at gmail.com] 
Sent: 26 January 2012 16:31
To: James Molloy
Cc: LLVM Developers Mailing List
Subject: Re: [LLVMdev] Compiling glibc with LLVM

 

Hi James,

 

I will look into the RedHat newlib library, however, we def are looking for
a solution for glibc, but maybe newlib would be a good way to go to test our
complete workflow before putting an effort to generate control flow graphs
for glibc.

 

btw. I did have another question, hopefully you would be able to answer,
what we are looking to do is to get the control flow graph including some
sort of alias analysis for function pointers. I see that there are already
existing analysis passes in LLVM to get the control flow, however do you
know how function pointer can be handled? 

 

Thanks

 

On Thu, Jan 26, 2012 at 11:06 AM, James Molloy <james.molloy at arm.com> wrote:

Hi Nipun,

 

As you say, glibc is rather GCC -oriented. I certainly haven't tried this
myself, but have you thought of using an alternate C library such as RedHat
newlib? That can certainly be compiled by clang (we do it every night).

 

Cheers,


James

 

From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
Behalf Of Nipun Arora
Sent: 26 January 2012 15:54
To: LLVM Developers Mailing List
Subject: [LLVMdev] Compiling glibc with LLVM

 

Hi,

 

I read on the gentoo website  <http://en.gentoo-wiki.com/wiki/Llvm>
http://en.gentoo-wiki.com/wiki/Llvm that glibc cannot be compiled using llvm
because of some GNU extensions which LLVM does not support.

 

Has there been any success in compiling glibc using LLVM so as to get the
bytecode?

We are looking to do whole program analysis to look at control flows
including those in libc... we were hoping that we could get the control
flows using LLVM API's for glibc.

 

Has anyone tried this before?

 

Thanks

Nipun

 
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