Re: [PATCH tracing/kprobes v2 1/5] tracing/kprobes: Rename special variables syntax

[Frederic Weisbecker <fweisbec@gmail.com>]

On Mon, Oct 05, 2009 at 12:59:01PM -0400, Masami Hiramatsu wrote:
> As far as I can see in arch/*/include/asm/ptrace.h, all registers start with
> alphabets :-). So, I'd like to suggest renaming sp-vars to '_sp-vars'.
>
> Then, we will have;
> - $local-vars


There is a risk of bash collision.


> - @global-symbol


We could use global-symbol as is. Shadowing between global
and local vars could be dealt with scope resolution:

function:var
file:var
file:line:var

And throw errors while submitting a shadowed var name, crying until
the user defines the scope, only if needed of course (if there are
no shadowing detected, we can submit a naked variable name).


> - regs


That can conflict with variable names


> - _sp-vars


That too.


> - +|-Offs(ARG)

You mean for arg numbers?
So we would have +1 for argument 1?

arg(1) looks more easy to remember and to understand, no?

Thanks.