llvm dev - Feb 2020 - Skipping a function/line in the debug information?

I'm not sure where to look or if it's possible, if someone could point
me
in the right direction that would be great

There's a few internal functions in my language like WriteLine. When I use
lldb to 'thread step-in' (or vscode) the debugger will enter the
function.
Is it possible to let lldb know it should skip the function? I tried using
clang to find some clues but puts and other function all allow me to step
in and gets a missing source error.
Is there any llvm-ir code I can look at to show me how to skip a function?
Or a language that generates the appropriate ir?
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I don't know of any DWARF functionality or extensions that are currently
used to communicate "uninteresting" functions not to step into.

If there's a specific example where you've seen this behavior work as
you'd
like in another language/frontend/etc - if you provide that example I/we
might be able to explain why it works that way & how you could reproduce
that behavior.

On Mon, Feb 24, 2020 at 12:54 PM Levo DeLellis via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> I'm not sure where to look or if it's possible, if someone could
point me
> in the right direction that would be great
>
> There's a few internal functions in my language like WriteLine. When I
use
> lldb to 'thread step-in' (or vscode) the debugger will enter the
function.
> Is it possible to let lldb know it should skip the function? I tried using
> clang to find some clues but puts and other function all allow me to step
> in and gets a missing source error.
> Is there any llvm-ir code I can look at to show me how to skip a function?
> Or a language that generates the appropriate ir?
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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The first two options that come to mind are:

1. don't generate debug info for these functions
Many debuggers will avoid stepping into functions without debug info.

2. mark the function as as DW_AT_artifical to communicate to your debugger to
skip it. I don't know if LLDB does this automatically, but you could easily
make that the behavior for your language. For details it's best to ask on
lldb-dev.

-- adrian
> On Feb 24, 2020, at 12:54 PM, Levo DeLellis via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> I'm not sure where to look or if it's possible, if someone could
point me in the right direction that would be great
> 
> There's a few internal functions in my language like WriteLine. When I
use lldb to 'thread step-in' (or vscode) the debugger will enter the
function. Is it possible to let lldb know it should skip the function? I tried
using clang to find some clues but puts and other function all allow me to step
in and gets a missing source error.
> Is there any llvm-ir code I can look at to show me how to skip a function?
Or a language that generates the appropriate ir?
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev