[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(LTTNG_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
#define LTTNG_TRACE_MODULE_H

#include <probes/lttng-tracepoint-event.h>
#include <linux/version.h>

#ifdef CONFIG_MODULES

#ifndef _TRACE_MODULE_DEF
#define _TRACE_MODULE_DEF
struct module;

#endif

LTTNG_TRACEPOINT_EVENT(module_load,

	TP_PROTO(struct module *mod),

	TP_ARGS(mod),

	TP_FIELDS(
		ctf_integer(unsigned int, taints, mod->taints)
		ctf_string(name, mod->name)
	)
)

LTTNG_TRACEPOINT_EVENT(module_free,

	TP_PROTO(struct module *mod),

	TP_ARGS(mod),

	TP_FIELDS(
		ctf_string(name, mod->name)
	)
)

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

LTTNG_TRACEPOINT_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_FIELDS(
		ctf_integer(unsigned long, ip, ip)
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
		ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
		ctf_integer(int, refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
#else
		ctf_integer(int, refcnt, refcnt)
#endif
		ctf_string(name, mod->name)
	)
)

LTTNG_TRACEPOINT_EVENT_INSTANCE(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
)

LTTNG_TRACEPOINT_EVENT_INSTANCE(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 */

LTTNG_TRACEPOINT_EVENT(module_request,

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

	TP_ARGS(name, wait, ip),

	TP_FIELDS(
		ctf_integer(unsigned long, ip, ip)
		ctf_integer(bool, wait, wait)
		ctf_string(name, name)
	)
)

#endif /* CONFIG_MODULES */

#endif /* LTTNG_TRACE_MODULE_H */

/* This part must be outside protection */
#include <probes/define_trace.h>
Commit	Line	Data
	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(LTTNG_TRACE_MODULE_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	15	#define LTTNG_TRACE_MODULE_H
	16
	17	#include <probes/lttng-tracepoint-event.h>
	18	#include <linux/version.h>
	19
	20	#ifdef CONFIG_MODULES
	21
	22	#ifndef _TRACE_MODULE_DEF
	23	#define _TRACE_MODULE_DEF
	24	struct module;
	25
	26	#endif
	27
	28	LTTNG_TRACEPOINT_EVENT(module_load,
	29
	30	TP_PROTO(struct module *mod),
	31
	32	TP_ARGS(mod),
	33
	34	TP_FIELDS(
	35	ctf_integer(unsigned int, taints, mod->taints)
	36	ctf_string(name, mod->name)
	37	)
	38	)
	39
	40	LTTNG_TRACEPOINT_EVENT(module_free,
	41
	42	TP_PROTO(struct module *mod),
	43
	44	TP_ARGS(mod),
	45
	46	TP_FIELDS(
	47	ctf_string(name, mod->name)
	48	)
	49	)
	50
	51	#ifdef CONFIG_MODULE_UNLOAD
	52	/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
	53
	54	LTTNG_TRACEPOINT_EVENT_CLASS(module_refcnt,
	55
	56	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	57	TP_PROTO(struct module *mod, unsigned long ip),
	58
	59	TP_ARGS(mod, ip),
	60	#else
	61	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	62
	63	TP_ARGS(mod, ip, refcnt),
	64	#endif
	65
	66	TP_FIELDS(
	67	ctf_integer(unsigned long, ip, ip)
	68	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
	69	ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
	70	#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	71	ctf_integer(int, refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
	72	#else
	73	ctf_integer(int, refcnt, refcnt)
	74	#endif
	75	ctf_string(name, mod->name)
	76	)
	77	)
	78
	79	LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
	80
	81	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	82	TP_PROTO(struct module *mod, unsigned long ip),
	83
	84	TP_ARGS(mod, ip)
	85	#else
	86	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	87
	88	TP_ARGS(mod, ip, refcnt)
	89	#endif
	90	)
	91
	92	LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
	93
	94	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	95	TP_PROTO(struct module *mod, unsigned long ip),
	96
	97	TP_ARGS(mod, ip)
	98	#else
	99	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	100
	101	TP_ARGS(mod, ip, refcnt)
	102	#endif
	103	)
	104	#endif /* CONFIG_MODULE_UNLOAD */
	105
	106	LTTNG_TRACEPOINT_EVENT(module_request,
	107
	108	TP_PROTO(char *name, bool wait, unsigned long ip),
	109
	110	TP_ARGS(name, wait, ip),
	111
	112	TP_FIELDS(
	113	ctf_integer(unsigned long, ip, ip)
	114	ctf_integer(bool, wait, wait)
	115	ctf_string(name, name)
	116	)
	117	)
	118
	119	#endif /* CONFIG_MODULES */
	120
	121	#endif /* LTTNG_TRACE_MODULE_H */
	122
	123	/* This part must be outside protection */
	124	#include <probes/define_trace.h>