[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;

#define show_module_flags(flags) __print_flags(flags, "",	\
	{ (1UL << TAINT_PROPRIETARY_MODULE),	"P" },		\
	{ (1UL << TAINT_FORCED_MODULE),		"F" },		\
	{ (1UL << TAINT_CRAP),			"C" })
#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
	26	#define show_module_flags(flags) __print_flags(flags, "", \
	27	{ (1UL << TAINT_PROPRIETARY_MODULE), "P" }, \
	28	{ (1UL << TAINT_FORCED_MODULE), "F" }, \
	29	{ (1UL << TAINT_CRAP), "C" })
	30	#endif
	31
	32	TRACE_EVENT(module_load,
	33
	34	TP_PROTO(struct module *mod),
	35
	36	TP_ARGS(mod),
	37
	38	TP_STRUCT__entry(
	39	__field( unsigned int, taints )
	40	__string( name, mod->name )
	41	),
	42
	43	TP_fast_assign(
d3ac4d63 PW	44	tp_assign(taints, mod->taints)
d3ac4d63 PW	45	tp_strcpy(name, mod->name)
b283666f PW	46	),
	47
	48	TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
	49	)
	50
	51	TRACE_EVENT(module_free,
	52
	53	TP_PROTO(struct module *mod),
	54
	55	TP_ARGS(mod),
	56
	57	TP_STRUCT__entry(
	58	__string( name, mod->name )
	59	),
	60
	61	TP_fast_assign(
d3ac4d63	62	tp_strcpy(name, mod->name)
b283666f PW	63	),
	64
	65	TP_printk("%s", __get_str(name))
	66	)
	67
	68	#ifdef CONFIG_MODULE_UNLOAD
	69	/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
	70
	71	DECLARE_EVENT_CLASS(module_refcnt,
	72
7c68b363	73	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
b283666f PW	74	TP_PROTO(struct module *mod, unsigned long ip),
	75
	76	TP_ARGS(mod, ip),
7c68b363 AG	77	#else
	78	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	79
	80	TP_ARGS(mod, ip, refcnt),
	81	#endif
b283666f PW	82
	83	TP_STRUCT__entry(
	84	__field( unsigned long, ip )
	85	__field( int, refcnt )
	86	__string( name, mod->name )
	87	),
	88
	89	TP_fast_assign(
d3ac4d63	90	tp_assign(ip, ip)
7c68b363	91	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
d3ac4d63	92	tp_assign(refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
7c68b363 AG	93	#else
	94	tp_assign(refcnt, refcnt)
	95	#endif
d3ac4d63	96	tp_strcpy(name, mod->name)
b283666f PW	97	),
	98
	99	TP_printk("%s call_site=%pf refcnt=%d",
	100	__get_str(name), (void *)__entry->ip, __entry->refcnt)
	101	)
	102
	103	DEFINE_EVENT(module_refcnt, module_get,
	104
7c68b363	105	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
b283666f PW	106	TP_PROTO(struct module *mod, unsigned long ip),
	107
	108	TP_ARGS(mod, ip)
7c68b363 AG	109	#else
	110	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	111
	112	TP_ARGS(mod, ip, refcnt)
	113	#endif
b283666f PW	114	)
	115
	116	DEFINE_EVENT(module_refcnt, module_put,
	117
7c68b363	118	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
b283666f PW	119	TP_PROTO(struct module *mod, unsigned long ip),
	120
	121	TP_ARGS(mod, ip)
7c68b363 AG	122	#else
	123	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	124
	125	TP_ARGS(mod, ip, refcnt)
	126	#endif
b283666f PW	127	)
	128	#endif /* CONFIG_MODULE_UNLOAD */
	129
	130	TRACE_EVENT(module_request,
	131
	132	TP_PROTO(char *name, bool wait, unsigned long ip),
	133
	134	TP_ARGS(name, wait, ip),
	135
	136	TP_STRUCT__entry(
	137	__field( unsigned long, ip )
	138	__field( bool, wait )
	139	__string( name, name )
	140	),
	141
	142	TP_fast_assign(
d3ac4d63 PW	143	tp_assign(ip, ip)
	144	tp_assign(wait, wait)
	145	tp_strcpy(name, name)
b283666f PW	146	),
	147
	148	TP_printk("%s wait=%d call_site=%pf",
	149	__get_str(name), (int)__entry->wait, (void *)__entry->ip)
	150	)
	151
	152	#endif /* CONFIG_MODULES */
	153
	154	#endif /* _TRACE_MODULE_H */
	155
	156	/* This part must be outside protection */
	157	#include "../../../probes/define_trace.h"