[LLVMdev] line number information

[John Trimble]

I get it now, I can't believe I didn't understand that before. Thank you all
for your help!

- John

On 4/8/06, Chris Lattner <sabre at nondot.org> wrote:
>
> On Sat, 8 Apr 2006, Jim Laskey wrote:
> > If you look at the stoppoint calls you'll see that you can find the line
> > number and if you follow the compile unit argument on the call you will
> find
> > the file.  The byte codes that follow the call would have been generated
> by
> > the code on that source line.
>
> I'd suggest an approach like this:
>
> Given an instruction in the a basic block, scan up and/or down the basic
> block, stopping at the first llvm.dbg.stoppoint instruction.  Something
> like this should work:
>
> #include "llvm/IntrinsicInst.h"
> ...
>
> for (...)
>    if (DbgStopPointInst *SP = dyn_cast<DbgStopPointInst>(Inst))
>      std::cerr << "Loc: " << SP->getFileName() << ":" << SP->getLine() <<
> "\n";
>
> If you look at IntrinsicInst, you'll see methods to get the
> filename,directory,line#,col#, all packaged up into an easy to use class
> (some of Jim's excellent work :).
>
> -Chris
>
> > On Apr 8, 2006, at 5:33 AM, John Trimble wrote:
> >
> >> Thanks for your help. I took a look at http://llvm.org/docs/
> >> SourceLevelDebugging.html and it seems like this doesn't give you much
> in
> >> the way of line number information. If you know what source line you
> are
> >> interested in then you can set a breakpoint, but suppose you want to
> know
> >> the line number in the source code for some arbitrary bytecode
> instruction.
> >> In my particular case, I have a pass that finds bytecode instructions
> that
> >> represent indirect calls, now I want to find out what line number and
> >> source file that indirect call came from. Is there currently not a way
> to
> >> get this type of information? Thanks again.
> >>
> >> - John Trimble
> >>
> >> On 4/7/06, Reid Spencer <reid at x10sys.com> wrote:
> >> The debug intrinsics are intended for that.  Please see:
> >> http://llvm.org/docs/SourceLevelDebugging.html
> >> for the details.
> >>
> >> Please note that this is being worked on actively Jim Laskey at Apple.
> >> He's working to get these intrinsics to generate DWARF output so that
> >> LLVM generated code can be used with a debugger. However, the
> intrinsics
> >> can be processed in whatever way you'd like via an LLVM pass.
> >>
> >> Reid.
> >>
> >> On Fri, 2006-04-07 at 14:59 -0700, John Trimble wrote:
> >> > So if compile some file test.c and get some binary test.bc can I
> >> > relate statements in test.bc with source code line numbers in test.c
> >> > and if so how would I go about doing that. Thanks for your time.
> >> >
> >>
> >>
> >> -----BEGIN PGP SIGNATURE-----
> >> Version: GnuPG v1.2.7 (GNU/Linux)
> >>
> >> iD8DBQBENusl3J9yEj6nvGcRAnu4AJ47NLg1bWv7mmzfa5+Et9ktF4QaYQCfUGeN
> >> wpHV/Hj6NkQWvWIJRzdZO2c=
> >> =NvMj
> >> -----END PGP SIGNATURE-----
> >>
> >>
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> >>
> >>
> >>
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> >
> >
>
> -Chris
>
> --
> http://nondot.org/sabre/
> http://llvm.org/
>
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