Re: [PATCH v7 23/36] function_graph: Add a new exit handler with parent_ip and ftrace_regs

[Steven Rostedt]

On Wed,  7 Feb 2024 00:11:44 +0900
"Masami Hiramatsu (Google)" <mhira...@kernel.org> wrote:

> From: Masami Hiramatsu (Google) <mhira...@kernel.org>
> 
> Add a new return handler to fgraph_ops as 'retregfunc'  which takes
> parent_ip and ftrace_regs instead of ftrace_graph_ret. This handler
> is available only if the arch support CONFIG_HAVE_FUNCTION_GRAPH_FREGS.
> Note that the 'retfunc' and 'reregfunc' are mutual exclusive.
> You can set only one of them.
> 
> Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org>
>

> @@ -1076,6 +1083,7 @@ struct fgraph_ops {
>       trace_func_graph_ent_t          entryfunc;
>       trace_func_graph_ret_t          retfunc;
>       trace_func_graph_regs_ent_t     entryregfunc;
> +     trace_func_graph_regs_ret_t     retregfunc;

Same for this:

struct fgraph_ops {
        union {
                trace_func_graph_ent_t          entryfunc;
                trace_func_graph_regs_ent_t     entryregfunc;
        };
        union {
                trace_func_graph_ret_t          retfunc;
                trace_func_graph_regs_ret_t     retregfunc;
        }

-- Steve


>       struct ftrace_ops               ops; /* for the hash lists */
>       void                            *private;
>       int                             idx;