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Commit 809dcf29 authored by Steven Rostedt's avatar Steven Rostedt
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ftrace: add pretty print to selected fuction traces 



This patch adds a call back for the tracers that have hooks to
selected functions. This allows the tracer to show better output
in the set_ftrace_filter file.

Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
parent 8fc0c701

include/linux/ftrace.h

+6 −0
Original line number Original line Diff line number Diff line
@@ -106,12 +106,18 @@ struct ftrace_func_command { 
/* asm/ftrace.h must be defined for archs supporting dynamic ftrace */

/* asm/ftrace.h must be defined for archs supporting dynamic ftrace */

#include <asm/ftrace.h>

#include <asm/ftrace.h>





struct seq_file;



struct ftrace_hook_ops {

struct ftrace_hook_ops {

	void			(*func)(unsigned long ip,

	void			(*func)(unsigned long ip,

					unsigned long parent_ip,

					unsigned long parent_ip,

					void **data);

					void **data);

	int			(*callback)(unsigned long ip, void **data);

	int			(*callback)(unsigned long ip, void **data);

	void			(*free)(void **data);

	void			(*free)(void **data);

	int			(*print)(struct seq_file *m,

					 unsigned long ip,

					 struct ftrace_hook_ops *ops,

					 void *data);

};

};





extern int

extern int

kernel/trace/ftrace.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -834,6 +834,9 @@ static int t_hash_show(struct seq_file *m, void *v) 




	rec = hlist_entry(hnd, struct ftrace_func_hook, node);

	rec = hlist_entry(hnd, struct ftrace_func_hook, node);





	if (rec->ops->print)

		return rec->ops->print(m, rec->ip, rec->ops, rec->data);



	kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);

	kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);

	seq_printf(m, "%s:", str);

	seq_printf(m, "%s:", str);