[LLVMdev] Questions about debug info in LLVM 2.8

[Jacob Zimmermann]

On Thu, 2011-01-06 at 11:13 -0800, Devang Patel wrote:

> On Jan 4, 2011, at 7:32 PM, Jacob Zimmermann wrote:
> 
> > Hi,
> > 
> > I'm currently porting some code from LLVM 2.6 to 2.8 and need to be able
> > to extract the debug info produced by LLVM-GCC and stored in the
> > compiled .bc file. However I admit I'm slightly confused about how
> > exactly to do that, the documentation doesn't seem to be very clear
> > about this, it mainly describes how to *generate* debug info.
> > Specifically I'm wondering about the following points:
> > 
> > 1) It seems that the various DIDescriptors contain the information I'd
> > need, but they can only be constructed from a MDNode How do I retrieve
> > the MDNode at the first place? Does MDNode::get() actually retrieve all
> > the debug metadata from Module, or does it merely initialise a fresh MDNode?
> > 
> > 2) DebugLoc has a getAsMDNode() method, but apparently it's only
> > available for Instructions?
> > 
> > 3) How can I retrieve a DIType instance? I can't find a way to obtain a
> > MDNode for a Type... ?
> > 
> > Many thanks if somebody can shed some light on this.
> 
> See DebugInfoFinder interface in Analysis/DebugInfo.h


Thanks Devang, however this doesn't seem to let me access local
variables, do you know how I can get at them?

Thanks
Jacob

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