[lttng-modules.git] / src / probes / lttng-kprobes.c

/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 *
 * probes/lttng-kprobes.c
 *
 * LTTng kprobes integration module.
 *
 * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/slab.h>
#include <lttng/events.h>
#include <lttng/events-internal.h>
#include <ringbuffer/frontend_types.h>
#include <wrapper/vmalloc.h>
#include <wrapper/irqflags.h>
#include <lttng/tracer.h>
#include <blacklist/kprobes.h>

static
int lttng_kprobes_event_handler_pre(struct kprobe *p, struct pt_regs *regs)
{
	struct lttng_kernel_event_common_private *event_priv =
		container_of(p, struct lttng_kernel_event_common_private, u.kprobe.kp);
	struct lttng_kernel_event_common *event = event_priv->pub;
	struct lttng_kernel_probe_ctx lttng_probe_ctx = {
		.event = event,
		.interruptible = !lttng_regs_irqs_disabled(regs),
	};
	unsigned long data = (unsigned long) p->addr;

	switch (event->type) {
	case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
	{
		struct lttng_kernel_event_recorder_private *event_recorder_priv =
			container_of(event_priv, struct lttng_kernel_event_recorder_private, parent);
		struct lttng_kernel_event_recorder *event_recorder =
			event_recorder_priv->pub;
		struct lttng_channel *chan = event_recorder->chan;

		if (unlikely(!LTTNG_READ_ONCE(chan->session->active)))
			return 0;
		if (unlikely(!LTTNG_READ_ONCE(chan->enabled)))
			return 0;
		break;
	}
	case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
		break;
	default:
		WARN_ON_ONCE(1);
	}

	if (unlikely(!LTTNG_READ_ONCE(event->enabled)))
		return 0;

	switch (event->type) {
	case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
	{
		struct lttng_kernel_event_recorder *event_recorder =
			container_of(event, struct lttng_kernel_event_recorder, parent);
		struct lttng_channel *chan = event_recorder->chan;
		struct lttng_kernel_ring_buffer_ctx ctx;
		int ret;

		lib_ring_buffer_ctx_init(&ctx, event_recorder, sizeof(data),
					 lttng_alignof(data), &lttng_probe_ctx);
		ret = chan->ops->event_reserve(&ctx);
		if (ret < 0)
			return 0;
		lib_ring_buffer_align_ctx(&ctx, lttng_alignof(data));
		chan->ops->event_write(&ctx, &data, sizeof(data));
		chan->ops->event_commit(&ctx);
		break;
	}
	case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
	{
		struct lttng_kernel_event_notifier *event_notifier =
			container_of(event, struct lttng_kernel_event_notifier, parent);
		struct lttng_kernel_notification_ctx notif_ctx;

		notif_ctx.eval_capture = LTTNG_READ_ONCE(event_notifier->eval_capture);
		event_notifier->notification_send(event_notifier, NULL, NULL, &notif_ctx);
		break;
	}
	default:
		WARN_ON_ONCE(1);
	}
	return 0;
}

static const struct lttng_kernel_type_common *event_type =
	lttng_kernel_static_type_integer_from_type(unsigned long, __BYTE_ORDER, 16);

/*
 * Create event description
 */
static
int lttng_create_kprobe_event(const char *name, struct lttng_kernel_event_recorder *event_recorder)
{
	const struct lttng_kernel_event_field **fieldp_array;
	struct lttng_kernel_event_field *field;
	struct lttng_kernel_event_desc *desc;
	int ret;

	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
	if (!desc)
		return -ENOMEM;
	desc->event_name = kstrdup(name, GFP_KERNEL);
	if (!desc->event_name) {
		ret = -ENOMEM;
		goto error_str;
	}
	desc->nr_fields = 1;
	fieldp_array = kzalloc(1 * sizeof(struct lttng_kernel_event_field *), GFP_KERNEL);
	if (!fieldp_array) {
		ret = -ENOMEM;
		goto error_fieldp_array;
	}
	desc->fields = fieldp_array;
	desc->fields[0] = field =
		kzalloc(sizeof(struct lttng_kernel_event_field), GFP_KERNEL);
	if (!field) {
		ret = -ENOMEM;
		goto error_field;
	}
	field->name = "ip";
	field->type = event_type;
	desc->owner = THIS_MODULE;
	event_recorder->priv->parent.desc = desc;

	return 0;

error_field:
	kfree(fieldp_array);
error_fieldp_array:
	kfree(desc->event_name);
error_str:
	kfree(desc);
	return ret;
}

/*
 * Create event_notifier description
 */
static
int lttng_create_kprobe_event_notifier(const char *name, struct lttng_kernel_event_notifier *event_notifier)
{
	struct lttng_kernel_event_desc *desc;
	int ret;

	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
	if (!desc)
		return -ENOMEM;
	desc->event_name = kstrdup(name, GFP_KERNEL);
	if (!desc->event_name) {
		ret = -ENOMEM;
		goto error_str;
	}
	desc->nr_fields = 0;

	desc->owner = THIS_MODULE;
	event_notifier->priv->parent.desc = desc;

	return 0;

error_str:
	kfree(desc);
	return ret;
}

static
int _lttng_kprobes_register(const char *symbol_name,
			   uint64_t offset,
			   uint64_t addr,
			   struct lttng_kprobe *lttng_kp,
			   kprobe_pre_handler_t pre_handler)
{
	int ret;

	/* Kprobes expects a NULL symbol name if unused */
	if (symbol_name[0] == '\0')
		symbol_name = NULL;

	memset(&lttng_kp->kp, 0, sizeof(lttng_kp->kp));
	lttng_kp->kp.pre_handler = pre_handler;

	if (symbol_name) {
		lttng_kp->symbol_name =
			kzalloc(LTTNG_KERNEL_ABI_SYM_NAME_LEN * sizeof(char),
				GFP_KERNEL);
		if (!lttng_kp->symbol_name) {
			ret = -ENOMEM;
			goto name_error;
		}
		memcpy(lttng_kp->symbol_name, symbol_name,
		       LTTNG_KERNEL_ABI_SYM_NAME_LEN * sizeof(char));
		lttng_kp->kp.symbol_name = lttng_kp->symbol_name;
	}

	lttng_kp->kp.offset = offset;
	lttng_kp->kp.addr = (void *) (unsigned long) addr;

	/*
	 * Ensure the memory we just allocated don't notify page faults.
	 * Well.. kprobes itself puts the page fault handler on the blacklist,
	 * but we can never be too careful.
	 */
	wrapper_vmalloc_sync_mappings();

	ret = register_kprobe(&lttng_kp->kp);
	if (ret)
		goto register_error;

	return 0;

register_error:
	kfree(lttng_kp->symbol_name);
name_error:
	return ret;
}

int lttng_kprobes_register_event(const char *name,
			   const char *symbol_name,
			   uint64_t offset,
			   uint64_t addr,
			   struct lttng_kernel_event_recorder *event_recorder)
{
	int ret;

	ret = lttng_create_kprobe_event(name, event_recorder);
	if (ret)
		goto error;

	ret = _lttng_kprobes_register(symbol_name, offset, addr,
		&event_recorder->priv->parent.u.kprobe, lttng_kprobes_event_handler_pre);
	if (ret)
		goto register_error;

	return 0;

register_error:
	kfree(event_recorder->priv->parent.desc->fields);
	kfree(event_recorder->priv->parent.desc->event_name);
	kfree(event_recorder->priv->parent.desc);
error:
	return ret;
}
EXPORT_SYMBOL_GPL(lttng_kprobes_register_event);

int lttng_kprobes_register_event_notifier(const char *symbol_name,
			   uint64_t offset,
			   uint64_t addr,
			   struct lttng_kernel_event_notifier *event_notifier)
{
	int ret;
	ret = lttng_create_kprobe_event_notifier(symbol_name, event_notifier);
	if (ret)
		goto error;

	ret = _lttng_kprobes_register(symbol_name, offset, addr,
		&event_notifier->priv->parent.u.kprobe, lttng_kprobes_event_handler_pre);
	if (ret)
		goto register_error;

	return 0;

register_error:
	kfree(event_notifier->priv->parent.desc->event_name);
	kfree(event_notifier->priv->parent.desc);
error:
	return ret;
}
EXPORT_SYMBOL_GPL(lttng_kprobes_register_event_notifier);

void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event_recorder)
{
	unregister_kprobe(&event_recorder->priv->parent.u.kprobe.kp);
}
EXPORT_SYMBOL_GPL(lttng_kprobes_unregister_event);

void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
{
	unregister_kprobe(&event_notifier->priv->parent.u.kprobe.kp);
}
EXPORT_SYMBOL_GPL(lttng_kprobes_unregister_event_notifier);

void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event_recorder)
{
	kfree(event_recorder->priv->parent.u.kprobe.symbol_name);
	kfree(event_recorder->priv->parent.desc->fields[0]);
	kfree(event_recorder->priv->parent.desc->fields);
	kfree(event_recorder->priv->parent.desc->event_name);
	kfree(event_recorder->priv->parent.desc);
}
EXPORT_SYMBOL_GPL(lttng_kprobes_destroy_event_private);

void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
{
	kfree(event_notifier->priv->parent.u.kprobe.symbol_name);
	kfree(event_notifier->priv->parent.desc->event_name);
	kfree(event_notifier->priv->parent.desc);
}
EXPORT_SYMBOL_GPL(lttng_kprobes_destroy_event_notifier_private);

MODULE_LICENSE("GPL and additional rights");
MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
MODULE_DESCRIPTION("LTTng kprobes probes");
MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
	__stringify(LTTNG_MODULES_MINOR_VERSION) "."
	__stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
	LTTNG_MODULES_EXTRAVERSION);
Commit	Line	Data
b7cdc182	1	/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
9f36eaed	2	*
886d51a3	3	* probes/lttng-kprobes.c
d6d808f3 MD	4	*
	5	* LTTng kprobes integration module.
	6	*
886d51a3	7	* Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
d6d808f3 MD	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/kprobes.h>
f17701fb	12	#include <linux/slab.h>
2df37e95	13	#include <lttng/events.h>
a67ba386	14	#include <lttng/events-internal.h>
24591303	15	#include <ringbuffer/frontend_types.h>
156a3977 MD	16	#include <wrapper/vmalloc.h>
156a3977 MD	17	#include <wrapper/irqflags.h>
2df37e95	18	#include <lttng/tracer.h>
caa068b5	19	#include <blacklist/kprobes.h>
d6d808f3	20
f17701fb	21	static
8bf17deb	22	int lttng_kprobes_event_handler_pre(struct kprobe p, struct pt_regs regs)
d6d808f3	23	{
a67ba386 MD	24	struct lttng_kernel_event_common_private *event_priv =
a67ba386 MD	25	container_of(p, struct lttng_kernel_event_common_private, u.kprobe.kp);
e2d5dbc7	26	struct lttng_kernel_event_common *event = event_priv->pub;
a92e844e	27	struct lttng_kernel_probe_ctx lttng_probe_ctx = {
e2d5dbc7	28	.event = event,
ccecf3fb	29	.interruptible = !lttng_regs_irqs_disabled(regs),
79150a49	30	};
d6d808f3 MD	31	unsigned long data = (unsigned long) p->addr;
d6d808f3 MD	32
e2d5dbc7 MD	33	switch (event->type) {
	34	case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
	35	{
	36	struct lttng_kernel_event_recorder_private *event_recorder_priv =
	37	container_of(event_priv, struct lttng_kernel_event_recorder_private, parent);
	38	struct lttng_kernel_event_recorder *event_recorder =
	39	event_recorder_priv->pub;
	40	struct lttng_channel *chan = event_recorder->chan;
	41
	42	if (unlikely(!LTTNG_READ_ONCE(chan->session->active)))
	43	return 0;
	44	if (unlikely(!LTTNG_READ_ONCE(chan->enabled)))
	45	return 0;
	46	break;
	47	}
	48	case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
	49	break;
	50	default:
	51	WARN_ON_ONCE(1);
	52	}
a67ba386	53
e2d5dbc7	54	if (unlikely(!LTTNG_READ_ONCE(event->enabled)))
2b16f0c9 FD	55	return 0;
2b16f0c9 FD	56
e2d5dbc7 MD	57	switch (event->type) {
	58	case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
	59	{
	60	struct lttng_kernel_event_recorder *event_recorder =
	61	container_of(event, struct lttng_kernel_event_recorder, parent);
	62	struct lttng_channel *chan = event_recorder->chan;
8a57ec02	63	struct lttng_kernel_ring_buffer_ctx ctx;
e2d5dbc7 MD	64	int ret;
e2d5dbc7 MD	65
b1199bd3 MD	66	lib_ring_buffer_ctx_init(&ctx, event_recorder, sizeof(data),
b1199bd3 MD	67	lttng_alignof(data), &lttng_probe_ctx);
c2fb9c1c	68	ret = chan->ops->event_reserve(&ctx);
e2d5dbc7 MD	69	if (ret < 0)
	70	return 0;
	71	lib_ring_buffer_align_ctx(&ctx, lttng_alignof(data));
	72	chan->ops->event_write(&ctx, &data, sizeof(data));
	73	chan->ops->event_commit(&ctx);
	74	break;
	75	}
	76	case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
	77	{
	78	struct lttng_kernel_event_notifier *event_notifier =
	79	container_of(event, struct lttng_kernel_event_notifier, parent);
	80	struct lttng_kernel_notification_ctx notif_ctx;
	81
	82	notif_ctx.eval_capture = LTTNG_READ_ONCE(event_notifier->eval_capture);
	83	event_notifier->notification_send(event_notifier, NULL, NULL, &notif_ctx);
	84	break;
	85	}
	86	default:
	87	WARN_ON_ONCE(1);
	88	}
2b16f0c9 FD	89	return 0;
	90	}
	91
437d5aa5 MD	92	static const struct lttng_kernel_type_common *event_type =
	93	lttng_kernel_static_type_integer_from_type(unsigned long, __BYTE_ORDER, 16);
	94
f17701fb MD	95	/*
	96	* Create event description
	97	*/
	98	static
a67ba386	99	int lttng_create_kprobe_event(const char name, struct lttng_kernel_event_recorder event_recorder)
f17701fb	100	{
437d5aa5 MD	101	const struct lttng_kernel_event_field **fieldp_array;
	102	struct lttng_kernel_event_field *field;
	103	struct lttng_kernel_event_desc *desc;
f17701fb MD	104	int ret;
f17701fb MD	105
437d5aa5	106	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
d3dbe23c	107	if (!desc)
f17701fb	108	return -ENOMEM;
437d5aa5 MD	109	desc->event_name = kstrdup(name, GFP_KERNEL);
437d5aa5 MD	110	if (!desc->event_name) {
f17701fb MD	111	ret = -ENOMEM;
	112	goto error_str;
	113	}
d3dbe23c	114	desc->nr_fields = 1;
437d5aa5 MD	115	fieldp_array = kzalloc(1 * sizeof(struct lttng_kernel_event_field *), GFP_KERNEL);
	116	if (!fieldp_array) {
	117	ret = -ENOMEM;
	118	goto error_fieldp_array;
	119	}
	120	desc->fields = fieldp_array;
	121	desc->fields[0] = field =
	122	kzalloc(sizeof(struct lttng_kernel_event_field), GFP_KERNEL);
0d1a681e MD	123	if (!field) {
	124	ret = -ENOMEM;
	125	goto error_field;
	126	}
f17701fb	127	field->name = "ip";
437d5aa5	128	field->type = event_type;
dc7f600a	129	desc->owner = THIS_MODULE;
a67ba386	130	event_recorder->priv->parent.desc = desc;
f17701fb MD	131
	132	return 0;
	133
0d1a681e	134	error_field:
437d5aa5 MD	135	kfree(fieldp_array);
	136	error_fieldp_array:
	137	kfree(desc->event_name);
f17701fb	138	error_str:
d3dbe23c	139	kfree(desc);
f17701fb MD	140	return ret;
	141	}
	142
2b16f0c9 FD	143	/*
	144	* Create event_notifier description
	145	*/
	146	static
a67ba386	147	int lttng_create_kprobe_event_notifier(const char name, struct lttng_kernel_event_notifier event_notifier)
2b16f0c9	148	{
437d5aa5	149	struct lttng_kernel_event_desc *desc;
2b16f0c9 FD	150	int ret;
2b16f0c9 FD	151
437d5aa5	152	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
2b16f0c9 FD	153	if (!desc)
2b16f0c9 FD	154	return -ENOMEM;
437d5aa5 MD	155	desc->event_name = kstrdup(name, GFP_KERNEL);
437d5aa5 MD	156	if (!desc->event_name) {
2b16f0c9 FD	157	ret = -ENOMEM;
	158	goto error_str;
	159	}
	160	desc->nr_fields = 0;
	161
	162	desc->owner = THIS_MODULE;
a67ba386	163	event_notifier->priv->parent.desc = desc;
2b16f0c9 FD	164
	165	return 0;
	166
	167	error_str:
	168	kfree(desc);
	169	return ret;
	170	}
	171
8bf17deb FD	172	static
8bf17deb FD	173	int _lttng_kprobes_register(const char *symbol_name,
f17701fb MD	174	uint64_t offset,
f17701fb MD	175	uint64_t addr,
8bf17deb FD	176	struct lttng_kprobe *lttng_kp,
8bf17deb FD	177	kprobe_pre_handler_t pre_handler)
f17701fb MD	178	{
	179	int ret;
	180
c37f2a9b MD	181	/* Kprobes expects a NULL symbol name if unused */
	182	if (symbol_name[0] == '\0')
	183	symbol_name = NULL;
	184
8bf17deb FD	185	memset(&lttng_kp->kp, 0, sizeof(lttng_kp->kp));
	186	lttng_kp->kp.pre_handler = pre_handler;
	187
c37f2a9b	188	if (symbol_name) {
8bf17deb	189	lttng_kp->symbol_name =
606828e4	190	kzalloc(LTTNG_KERNEL_ABI_SYM_NAME_LEN * sizeof(char),
c37f2a9b	191	GFP_KERNEL);
8bf17deb	192	if (!lttng_kp->symbol_name) {
c37f2a9b MD	193	ret = -ENOMEM;
	194	goto name_error;
	195	}
8bf17deb	196	memcpy(lttng_kp->symbol_name, symbol_name,
606828e4	197	LTTNG_KERNEL_ABI_SYM_NAME_LEN * sizeof(char));
8bf17deb	198	lttng_kp->kp.symbol_name = lttng_kp->symbol_name;
f17701fb	199	}
8bf17deb FD	200
	201	lttng_kp->kp.offset = offset;
	202	lttng_kp->kp.addr = (void *) (unsigned long) addr;
16a9a591 MD	203
16a9a591 MD	204	/*
196bfc6a	205	* Ensure the memory we just allocated don't notify page faults.
16a9a591 MD	206	* Well.. kprobes itself puts the page fault handler on the blacklist,
	207	* but we can never be too careful.
	208	*/
263b6c88	209	wrapper_vmalloc_sync_mappings();
16a9a591	210
8bf17deb	211	ret = register_kprobe(&lttng_kp->kp);
f17701fb MD	212	if (ret)
f17701fb MD	213	goto register_error;
8bf17deb	214
f17701fb MD	215	return 0;
	216
	217	register_error:
8bf17deb	218	kfree(lttng_kp->symbol_name);
f17701fb	219	name_error:
8bf17deb FD	220	return ret;
	221	}
	222
	223	int lttng_kprobes_register_event(const char *name,
	224	const char *symbol_name,
	225	uint64_t offset,
	226	uint64_t addr,
a67ba386	227	struct lttng_kernel_event_recorder *event_recorder)
8bf17deb FD	228	{
	229	int ret;
	230
a67ba386	231	ret = lttng_create_kprobe_event(name, event_recorder);
8bf17deb FD	232	if (ret)
	233	goto error;
	234
	235	ret = _lttng_kprobes_register(symbol_name, offset, addr,
a67ba386	236	&event_recorder->priv->parent.u.kprobe, lttng_kprobes_event_handler_pre);
8bf17deb FD	237	if (ret)
	238	goto register_error;
	239
	240	return 0;
	241
	242	register_error:
a67ba386 MD	243	kfree(event_recorder->priv->parent.desc->fields);
	244	kfree(event_recorder->priv->parent.desc->event_name);
	245	kfree(event_recorder->priv->parent.desc);
f17701fb MD	246	error:
	247	return ret;
	248	}
8bf17deb	249	EXPORT_SYMBOL_GPL(lttng_kprobes_register_event);
f17701fb	250
2b16f0c9 FD	251	int lttng_kprobes_register_event_notifier(const char *symbol_name,
	252	uint64_t offset,
	253	uint64_t addr,
a67ba386	254	struct lttng_kernel_event_notifier *event_notifier)
2b16f0c9 FD	255	{
	256	int ret;
	257	ret = lttng_create_kprobe_event_notifier(symbol_name, event_notifier);
	258	if (ret)
	259	goto error;
	260
	261	ret = _lttng_kprobes_register(symbol_name, offset, addr,
e2d5dbc7	262	&event_notifier->priv->parent.u.kprobe, lttng_kprobes_event_handler_pre);
2b16f0c9 FD	263	if (ret)
	264	goto register_error;
	265
	266	return 0;
	267
	268	register_error:
a67ba386 MD	269	kfree(event_notifier->priv->parent.desc->event_name);
a67ba386 MD	270	kfree(event_notifier->priv->parent.desc);
2b16f0c9 FD	271	error:
	272	return ret;
	273	}
	274	EXPORT_SYMBOL_GPL(lttng_kprobes_register_event_notifier);
	275
a67ba386	276	void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event_recorder)
f17701fb	277	{
a67ba386	278	unregister_kprobe(&event_recorder->priv->parent.u.kprobe.kp);
edeb3137	279	}
8bf17deb	280	EXPORT_SYMBOL_GPL(lttng_kprobes_unregister_event);
edeb3137	281
a67ba386	282	void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
2b16f0c9	283	{
a67ba386	284	unregister_kprobe(&event_notifier->priv->parent.u.kprobe.kp);
2b16f0c9 FD	285	}
	286	EXPORT_SYMBOL_GPL(lttng_kprobes_unregister_event_notifier);
	287
a67ba386	288	void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event_recorder)
edeb3137	289	{
a67ba386 MD	290	kfree(event_recorder->priv->parent.u.kprobe.symbol_name);
	291	kfree(event_recorder->priv->parent.desc->fields[0]);
	292	kfree(event_recorder->priv->parent.desc->fields);
	293	kfree(event_recorder->priv->parent.desc->event_name);
	294	kfree(event_recorder->priv->parent.desc);
f17701fb	295	}
8bf17deb	296	EXPORT_SYMBOL_GPL(lttng_kprobes_destroy_event_private);
d6d808f3	297
a67ba386	298	void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
2b16f0c9	299	{
a67ba386 MD	300	kfree(event_notifier->priv->parent.u.kprobe.symbol_name);
	301	kfree(event_notifier->priv->parent.desc->event_name);
	302	kfree(event_notifier->priv->parent.desc);
2b16f0c9 FD	303	}
	304	EXPORT_SYMBOL_GPL(lttng_kprobes_destroy_event_notifier_private);
	305
d6d808f3	306	MODULE_LICENSE("GPL and additional rights");
1c124020 MJ	307	MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
1c124020 MJ	308	MODULE_DESCRIPTION("LTTng kprobes probes");
13ab8b0a MD	309	MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
	310	__stringify(LTTNG_MODULES_MINOR_VERSION) "."
	311	__stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
	312	LTTNG_MODULES_EXTRAVERSION);