Commit d5dbf8b4 authored by Masami Hiramatsu (Google)'s avatar Masami Hiramatsu (Google)
Browse files

tracepoint: Support iterating over tracepoints on modules 

Add for_each_module_tracepoint() for iterating over tracepoints
on modules. This is similar to the for_each_kernel_tracepoint()
but only for the tracepoints on modules (not including kernel
built-in tracepoints).

Link: https://lore.kernel.org/all/172397777800.286558.14554748203446214056.stgit@devnote2/



Signed-off-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
parent ce4db753

include/linux/tracepoint.h

+7 −0
Original line number Diff line number Diff line
@@ -64,6 +64,8 @@ struct tp_module { 
bool trace_module_has_bad_taint(struct module *mod);

extern int register_tracepoint_module_notifier(struct notifier_block *nb);

extern int unregister_tracepoint_module_notifier(struct notifier_block *nb);

void for_each_module_tracepoint(void (*fct)(struct tracepoint *, void *),

				void *priv);

#else

static inline bool trace_module_has_bad_taint(struct module *mod)

{
@@ -79,6 +81,11 @@ int unregister_tracepoint_module_notifier(struct notifier_block *nb) 
{

	return 0;

}

static inline

void for_each_module_tracepoint(void (*fct)(struct tracepoint *, void *),

				void *priv)

{

}

#endif /* CONFIG_MODULES */



/*

kernel/tracepoint.c

+21 −0
Original line number Diff line number Diff line
@@ -735,6 +735,27 @@ static __init int init_tracepoints(void) 
	return ret;

}

__initcall(init_tracepoints);



/**

 * for_each_module_tracepoint - iteration on all tracepoints in all modules

 * @fct: callback

 * @priv: private data

 */

void for_each_module_tracepoint(void (*fct)(struct tracepoint *tp, void *priv),

				void *priv)

{

	struct tp_module *tp_mod;

	struct module *mod;



	mutex_lock(&tracepoint_module_list_mutex);

	list_for_each_entry(tp_mod, &tracepoint_module_list, list) {

		mod = tp_mod->mod;

		for_each_tracepoint_range(mod->tracepoints_ptrs,

			mod->tracepoints_ptrs + mod->num_tracepoints,

			fct, priv);

	}

	mutex_unlock(&tracepoint_module_list_mutex);

}

#endif /* CONFIG_MODULES */



/**