llvm dev - Jun 2020 - Need help in creating clone functions

Hello,

I am working on creating a llvm pass which clones a certain function with a
different name using CloneFunctionInto. I create a call instruction to call
a new cloned function from the old function. In llvm IR and in .s file
everything looks as expected, but when I call this program with gdb and set
a breakpoint on this new function, gdb shows the name of the original
function. I know it has to do something with debug options but I am not
sure how should I set the debug options of this new function so that I can
see it in gdb.
Can someone please help me with this?

Regards,
Sangeeta
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20200615/7072698c/attachment.html>

Check the DISubprogram associated with the cloned function (in the
LLVM IR the Function definition would have an "!dbg !47" at the end,
and that !47 would refer to a !DISubprogram that describes th
efunction) - you'd probably need to create a new DISubprogram and set
that as the subprogram for the new llvm::Function so it doesn't share
the same description/name/etc as the original.

On Mon, Jun 15, 2020 at 4:37 PM SANGEETA CHOWDHARY via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> Hello,
>
> I am working on creating a llvm pass which clones a certain function with a
different name using CloneFunctionInto. I create a call instruction to call a
new cloned function from the old function. In llvm IR and in .s file everything
looks as expected, but when I call this program with gdb and set a breakpoint on
this new function, gdb shows the name of the original function. I know it has to
do something with debug options but I am not sure how should I set the debug
options of this new function so that I can see it in gdb.
> Can someone please help me with this?
>
> Regards,
> Sangeeta
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Thanks, David for the quick response. It definitely has solved the problem.

Regards,
Sangeeta


On Mon, Jun 15, 2020 at 7:43 PM David Blaikie <dblaikie at gmail.com>
wrote:
> Check the DISubprogram associated with the cloned function (in the
> LLVM IR the Function definition would have an "!dbg !47" at the
end,
> and that !47 would refer to a !DISubprogram that describes th
> efunction) - you'd probably need to create a new DISubprogram and set
> that as the subprogram for the new llvm::Function so it doesn't share
> the same description/name/etc as the original.
>
> On Mon, Jun 15, 2020 at 4:37 PM SANGEETA CHOWDHARY via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> >
> > Hello,
> >
> > I am working on creating a llvm pass which clones a certain function
> with a different name using CloneFunctionInto. I create a call instruction
> to call a new cloned function from the old function. In llvm IR and in .s
> file everything looks as expected, but when I call this program with gdb
> and set a breakpoint on this new function, gdb shows the name of the
> original function. I know it has to do something with debug options but I
> am not sure how should I set the debug options of this new function so that
> I can see it in gdb.
> > Can someone please help me with this?
> >
> > Regards,
> > Sangeeta
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20200616/f9c2a46a/attachment.html>