[lttng-modules.git] / instrumentation / events / lttng-module / module.h

/*
 * Because linux/module.h has tracepoints in the header, and ftrace.h
 * eventually includes this file, define_trace.h includes linux/module.h
 * But we do not want the module.h to override the TRACE_SYSTEM macro
 * variable that define_trace.h is processing, so we only set it
 * when module events are being processed, which would happen when
 * CREATE_TRACE_POINTS is defined.
 */
#ifdef CREATE_TRACE_POINTS
#undef TRACE_SYSTEM
#define TRACE_SYSTEM module
#endif

#if !defined(_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_MODULE_H

#include <linux/tracepoint.h>
#include <linux/version.h>

#ifdef CONFIG_MODULES

#ifndef _TRACE_MODULE_DEF
#define _TRACE_MODULE_DEF
struct module;

#endif

TRACE_EVENT(module_load,

	TP_PROTO(struct module *mod),

	TP_ARGS(mod),

	TP_STRUCT__entry(
		__field(	unsigned int,	taints		)
		__string(	name,		mod->name	)
	),

	TP_fast_assign(
		tp_assign(taints, mod->taints)
		tp_strcpy(name, mod->name)
	),

	TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
)

TRACE_EVENT(module_free,

	TP_PROTO(struct module *mod),

	TP_ARGS(mod),

	TP_STRUCT__entry(
		__string(	name,		mod->name	)
	),

	TP_fast_assign(
		tp_strcpy(name, mod->name)
	),

	TP_printk("%s", __get_str(name))
)

#ifdef CONFIG_MODULE_UNLOAD
/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */

DECLARE_EVENT_CLASS(module_refcnt,

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	TP_PROTO(struct module *mod, unsigned long ip),

	TP_ARGS(mod, ip),
#else
	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),

	TP_ARGS(mod, ip, refcnt),
#endif

	TP_STRUCT__entry(
		__field(	unsigned long,	ip		)
		__field(	int,		refcnt		)
		__string(	name,		mod->name	)
	),

	TP_fast_assign(
		tp_assign(ip, ip)
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
		tp_assign(refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
#else
		tp_assign(refcnt, refcnt)
#endif
		tp_strcpy(name, mod->name)
	),

	TP_printk("%s call_site=%pf refcnt=%d",
		  __get_str(name), (void *)__entry->ip, __entry->refcnt)
)

DEFINE_EVENT(module_refcnt, module_get,

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	TP_PROTO(struct module *mod, unsigned long ip),

	TP_ARGS(mod, ip)
#else
	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),

	TP_ARGS(mod, ip, refcnt)
#endif
)

DEFINE_EVENT(module_refcnt, module_put,

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	TP_PROTO(struct module *mod, unsigned long ip),

	TP_ARGS(mod, ip)
#else
	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),

	TP_ARGS(mod, ip, refcnt)
#endif
)
#endif /* CONFIG_MODULE_UNLOAD */

TRACE_EVENT(module_request,

	TP_PROTO(char *name, bool wait, unsigned long ip),

	TP_ARGS(name, wait, ip),

	TP_STRUCT__entry(
		__field(	unsigned long,	ip		)
		__field(	bool,		wait		)
		__string(	name,		name		)
	),

	TP_fast_assign(
		tp_assign(ip, ip)
		tp_assign(wait, wait)
		tp_strcpy(name, name)
	),

	TP_printk("%s wait=%d call_site=%pf",
		  __get_str(name), (int)__entry->wait, (void *)__entry->ip)
)

#endif /* CONFIG_MODULES */

#endif /* _TRACE_MODULE_H */

/* This part must be outside protection */
#include "../../../probes/define_trace.h"
Commit	Line	Data
b283666f PW	1	/*
	2	* Because linux/module.h has tracepoints in the header, and ftrace.h
	3	* eventually includes this file, define_trace.h includes linux/module.h
	4	* But we do not want the module.h to override the TRACE_SYSTEM macro
	5	* variable that define_trace.h is processing, so we only set it
	6	* when module events are being processed, which would happen when
	7	* CREATE_TRACE_POINTS is defined.
	8	*/
	9	#ifdef CREATE_TRACE_POINTS
	10	#undef TRACE_SYSTEM
	11	#define TRACE_SYSTEM module
	12	#endif
	13
	14	#if !defined(_TRACE_MODULE_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	15	#define _TRACE_MODULE_H
	16
	17	#include <linux/tracepoint.h>
7c68b363	18	#include <linux/version.h>
b283666f PW	19
	20	#ifdef CONFIG_MODULES
	21
	22	#ifndef _TRACE_MODULE_DEF
	23	#define _TRACE_MODULE_DEF
	24	struct module;
	25
b283666f PW	26	#endif
	27
	28	TRACE_EVENT(module_load,
	29
	30	TP_PROTO(struct module *mod),
	31
	32	TP_ARGS(mod),
	33
	34	TP_STRUCT__entry(
	35	__field( unsigned int, taints )
	36	__string( name, mod->name )
	37	),
	38
	39	TP_fast_assign(
d3ac4d63 PW	40	tp_assign(taints, mod->taints)
d3ac4d63 PW	41	tp_strcpy(name, mod->name)
b283666f PW	42	),
	43
	44	TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
	45	)
	46
	47	TRACE_EVENT(module_free,
	48
	49	TP_PROTO(struct module *mod),
	50
	51	TP_ARGS(mod),
	52
	53	TP_STRUCT__entry(
	54	__string( name, mod->name )
	55	),
	56
	57	TP_fast_assign(
d3ac4d63	58	tp_strcpy(name, mod->name)
b283666f PW	59	),
	60
	61	TP_printk("%s", __get_str(name))
	62	)
	63
	64	#ifdef CONFIG_MODULE_UNLOAD
	65	/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
	66
	67	DECLARE_EVENT_CLASS(module_refcnt,
	68
7c68b363	69	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
b283666f PW	70	TP_PROTO(struct module *mod, unsigned long ip),
	71
	72	TP_ARGS(mod, ip),
7c68b363 AG	73	#else
	74	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	75
	76	TP_ARGS(mod, ip, refcnt),
	77	#endif
b283666f PW	78
	79	TP_STRUCT__entry(
	80	__field( unsigned long, ip )
	81	__field( int, refcnt )
	82	__string( name, mod->name )
	83	),
	84
	85	TP_fast_assign(
d3ac4d63	86	tp_assign(ip, ip)
7c68b363	87	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
d3ac4d63	88	tp_assign(refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
7c68b363 AG	89	#else
	90	tp_assign(refcnt, refcnt)
	91	#endif
d3ac4d63	92	tp_strcpy(name, mod->name)
b283666f PW	93	),
	94
	95	TP_printk("%s call_site=%pf refcnt=%d",
	96	__get_str(name), (void *)__entry->ip, __entry->refcnt)
	97	)
	98
	99	DEFINE_EVENT(module_refcnt, module_get,
	100
7c68b363	101	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
b283666f PW	102	TP_PROTO(struct module *mod, unsigned long ip),
	103
	104	TP_ARGS(mod, ip)
7c68b363 AG	105	#else
	106	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	107
	108	TP_ARGS(mod, ip, refcnt)
	109	#endif
b283666f PW	110	)
	111
	112	DEFINE_EVENT(module_refcnt, module_put,
	113
7c68b363	114	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
b283666f PW	115	TP_PROTO(struct module *mod, unsigned long ip),
	116
	117	TP_ARGS(mod, ip)
7c68b363 AG	118	#else
	119	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	120
	121	TP_ARGS(mod, ip, refcnt)
	122	#endif
b283666f PW	123	)
	124	#endif /* CONFIG_MODULE_UNLOAD */
	125
	126	TRACE_EVENT(module_request,
	127
	128	TP_PROTO(char *name, bool wait, unsigned long ip),
	129
	130	TP_ARGS(name, wait, ip),
	131
	132	TP_STRUCT__entry(
	133	__field( unsigned long, ip )
	134	__field( bool, wait )
	135	__string( name, name )
	136	),
	137
	138	TP_fast_assign(
d3ac4d63 PW	139	tp_assign(ip, ip)
	140	tp_assign(wait, wait)
	141	tp_strcpy(name, name)
b283666f PW	142	),
	143
	144	TP_printk("%s wait=%d call_site=%pf",
	145	__get_str(name), (int)__entry->wait, (void *)__entry->ip)
	146	)
	147
	148	#endif /* CONFIG_MODULES */
	149
	150	#endif /* _TRACE_MODULE_H */
	151
	152	/* This part must be outside protection */
	153	#include "../../../probes/define_trace.h"