Re: [PATCH v5] tracing/eprobes: Allow use of BTF names to dereference pointers

[Masami Hiramatsu (Google) <mhiramat@kernel.org>]

On Wed, 20 May 2026 12:48:32 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Wed, 20 May 2026 15:20:21 +0900
> Masami Hiramatsu (Google) <mhiramat@kernel.org> wrote:
> 
> > > > > @@ -515,6 +542,10 @@ static void clear_btf_context(struct traceprobe_parse_context *ctx)
> > > > >  		ctx->params = NULL;
> > > > >  		ctx->nr_params = 0;
> > > > >  	}
> > > > > +	if (ctx->struct_btf) {
> > > > > +		btf_put(ctx->struct_btf);
> > > > > +		ctx->last_struct = NULL;    
> > > > 
> > > > [Severity: Low]
> > > > Should ctx->struct_btf be explicitly set to NULL after btf_put() drops
> > > > the reference?  
> > > 
> > > I'm thinking of dropping it in the '(' switch case.  
> > 
> > Can you consider making the '(' switch case part as a helper
> > function because it depends on CONFIG_DEBUG_INFO_BTF?
> 
> Should we just encapsulate that entire case statement with:
> 
> #ifdef CONFIG_DEBUG_INFO_BTF
> [..]
> #endif

Yeah that is possible, and I rather like to make it a separate
function for simplifying switch-case block for readability.

Thank you,

> 
>  ?
> 
> -- Steve
> 
> 


-- 
Masami Hiramatsu (Google) <mhiramat@kernel.org>