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

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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	/* SPDX-License-Identifier: GPL-2.0 */
	2	/*
	3	* Because linux/module.h has tracepoints in the header, and ftrace.h
	4	* eventually includes this file, define_trace.h includes linux/module.h
	5	* But we do not want the module.h to override the TRACE_SYSTEM macro
	6	* variable that define_trace.h is processing, so we only set it
	7	* when module events are being processed, which would happen when
	8	* CREATE_TRACE_POINTS is defined.
	9	*/
	10	#ifdef CREATE_TRACE_POINTS
	11	#undef TRACE_SYSTEM
	12	#define TRACE_SYSTEM module
	13	#endif
	14
	15	#if !defined(LTTNG_TRACE_MODULE_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	16	#define LTTNG_TRACE_MODULE_H
	17
	18	#include <probes/lttng-tracepoint-event.h>
	19	#include <linux/version.h>
	20
	21	#ifdef CONFIG_MODULES
	22
	23	#ifndef _TRACE_MODULE_DEF
	24	#define _TRACE_MODULE_DEF
	25	struct module;
	26
	27	#endif
	28
	29	LTTNG_TRACEPOINT_EVENT(module_load,
	30
	31	TP_PROTO(struct module *mod),
	32
	33	TP_ARGS(mod),
	34
	35	TP_FIELDS(
	36	ctf_integer(unsigned int, taints, mod->taints)
	37	ctf_string(name, mod->name)
	38	)
	39	)
	40
	41	LTTNG_TRACEPOINT_EVENT(module_free,
	42
	43	TP_PROTO(struct module *mod),
	44
	45	TP_ARGS(mod),
	46
	47	TP_FIELDS(
	48	ctf_string(name, mod->name)
	49	)
	50	)
	51
	52	#ifdef CONFIG_MODULE_UNLOAD
	53	/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
	54
	55	LTTNG_TRACEPOINT_EVENT_CLASS(module_refcnt,
	56
	57	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	58	TP_PROTO(struct module *mod, unsigned long ip),
	59
	60	TP_ARGS(mod, ip),
	61	#else
	62	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	63
	64	TP_ARGS(mod, ip, refcnt),
	65	#endif
	66
	67	TP_FIELDS(
	68	ctf_integer(unsigned long, ip, ip)
	69	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
	70	ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
	71	#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	72	ctf_integer(int, refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
	73	#else
	74	ctf_integer(int, refcnt, refcnt)
	75	#endif
	76	ctf_string(name, mod->name)
	77	)
	78	)
	79
	80	LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
	81
	82	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	83	TP_PROTO(struct module *mod, unsigned long ip),
	84
	85	TP_ARGS(mod, ip)
	86	#else
	87	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	88
	89	TP_ARGS(mod, ip, refcnt)
	90	#endif
	91	)
	92
	93	LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
	94
	95	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
	96	TP_PROTO(struct module *mod, unsigned long ip),
	97
	98	TP_ARGS(mod, ip)
	99	#else
	100	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
	101
	102	TP_ARGS(mod, ip, refcnt)
	103	#endif
	104	)
	105	#endif /* CONFIG_MODULE_UNLOAD */
	106
	107	LTTNG_TRACEPOINT_EVENT(module_request,
	108
	109	TP_PROTO(char *name, bool wait, unsigned long ip),
	110
	111	TP_ARGS(name, wait, ip),
	112
	113	TP_FIELDS(
	114	ctf_integer(unsigned long, ip, ip)
	115	ctf_integer(bool, wait, wait)
	116	ctf_string(name, name)
	117	)
	118	)
	119
	120	#endif /* CONFIG_MODULES */
	121
	122	#endif /* LTTNG_TRACE_MODULE_H */
	123
	124	/* This part must be outside protection */
	125	#include <probes/define_trace.h>