[lttng-tools.git] / src / common / event-rule / uprobe.c

/*
 * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 */

#include <assert.h>
#include <common/credentials.h>
#include <common/error.h>
#include <common/macros.h>
#include <common/payload.h>
#include <common/payload-view.h>
#include <common/runas.h>
#include <common/hashtable/hashtable.h>
#include <common/hashtable/utils.h>
#include <lttng/event-rule/event-rule-internal.h>
#include <lttng/event-rule/uprobe-internal.h>
#include <lttng/userspace-probe-internal.h>

#define IS_UPROBE_EVENT_RULE(rule) \
	(lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_UPROBE)

static void lttng_event_rule_uprobe_destroy(struct lttng_event_rule *rule)
{
	struct lttng_event_rule_uprobe *uprobe;

	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);

	lttng_userspace_probe_location_destroy(uprobe->location);
	free(uprobe->name);
	free(uprobe);
}

static bool lttng_event_rule_uprobe_validate(
		const struct lttng_event_rule *rule)
{
	bool valid = false;
	struct lttng_event_rule_uprobe *uprobe;

	if (!rule) {
		goto end;
	}

	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);

	/* Required field. */
	if (!uprobe->name) {
		ERR("Invalid uprobe event rule: a pattern must be set.");
		goto end;
	}

	if (!uprobe->location) {
		ERR("Invalid uprobe event rule: a location must be set.");
		goto end;
	}

	valid = true;
end:
	return valid;
}

static int lttng_event_rule_uprobe_serialize(
		const struct lttng_event_rule *rule,
		struct lttng_payload *payload)
{
	int ret;
	size_t name_len, header_offset, size_before_probe;
	struct lttng_event_rule_uprobe *uprobe;
	struct lttng_event_rule_uprobe_comm uprobe_comm = {};
	struct lttng_event_rule_uprobe_comm *header;

	if (!rule || !IS_UPROBE_EVENT_RULE(rule)) {
		ret = -1;
		goto end;
	}

	header_offset = payload->buffer.size;

	DBG("Serializing uprobe event rule.");
	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);

	name_len = strlen(uprobe->name) + 1;

	uprobe_comm.name_len = name_len;

	ret = lttng_dynamic_buffer_append(
			&payload->buffer, &uprobe_comm, sizeof(uprobe_comm));
	if (ret) {
		goto end;
	}
	ret = lttng_dynamic_buffer_append(
			&payload->buffer, uprobe->name, name_len);
	if (ret) {
		goto end;
	}

	size_before_probe = payload->buffer.size;

	/* This serialize return the size taken in the buffer. */
	ret = lttng_userspace_probe_location_serialize(
			uprobe->location, payload);
	if (ret < 0) {
		goto end;
	}

	/* Update the header regarding the probe size. */
	header = (struct lttng_event_rule_uprobe_comm
					*) ((char *) payload->buffer.data +
			header_offset);
	header->location_len = payload->buffer.size - size_before_probe;

	ret = 0;

end:
	return ret;
}

static bool lttng_event_rule_uprobe_is_equal(const struct lttng_event_rule *_a,
		const struct lttng_event_rule *_b)
{
	bool is_equal = false;
	struct lttng_event_rule_uprobe *a, *b;

	a = container_of(_a, struct lttng_event_rule_uprobe, parent);
	b = container_of(_b, struct lttng_event_rule_uprobe, parent);

	/* uprobe is invalid if this is not true. */
	assert(a->name);
	assert(b->name);
	if (strcmp(a->name, b->name)) {
		goto end;
	}

	assert(a->location);
	assert(b->location);
	is_equal = lttng_userspace_probe_location_is_equal(
			a->location, b->location);
end:
	return is_equal;
}

static enum lttng_error_code lttng_event_rule_uprobe_generate_filter_bytecode(
		struct lttng_event_rule *rule,
		const struct lttng_credentials *creds)
{
	/* Nothing to do. */
	return LTTNG_OK;
}

static const char *lttng_event_rule_uprobe_get_filter(
		const struct lttng_event_rule *rule)
{
	/* Unsupported. */
	return NULL;
}

static const struct lttng_bytecode *
lttng_event_rule_uprobe_get_filter_bytecode(const struct lttng_event_rule *rule)
{
	/* Unsupported. */
	return NULL;
}

static enum lttng_event_rule_generate_exclusions_status
lttng_event_rule_uprobe_generate_exclusions(const struct lttng_event_rule *rule,
		struct lttng_event_exclusion **exclusions)
{
	/* Unsupported. */
	*exclusions = NULL;
	return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
}

static unsigned long
lttng_event_rule_uprobe_hash(
		const struct lttng_event_rule *rule)
{
	unsigned long hash;
	struct lttng_event_rule_uprobe *urule =
			container_of(rule, typeof(*urule), parent);

	hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_UPROBE,
			lttng_ht_seed);
	hash ^= hash_key_str(urule->name, lttng_ht_seed);
	hash ^= lttng_userspace_probe_location_hash(urule->location);

	return hash;
}

struct lttng_event_rule *lttng_event_rule_uprobe_create(void)
{
	struct lttng_event_rule *rule = NULL;
	struct lttng_event_rule_uprobe *urule;

	urule = zmalloc(sizeof(struct lttng_event_rule_uprobe));
	if (!urule) {
		goto end;
	}

	rule = &urule->parent;
	lttng_event_rule_init(&urule->parent, LTTNG_EVENT_RULE_TYPE_UPROBE);
	urule->parent.validate = lttng_event_rule_uprobe_validate;
	urule->parent.serialize = lttng_event_rule_uprobe_serialize;
	urule->parent.equal = lttng_event_rule_uprobe_is_equal;
	urule->parent.destroy = lttng_event_rule_uprobe_destroy;
	urule->parent.generate_filter_bytecode =
			lttng_event_rule_uprobe_generate_filter_bytecode;
	urule->parent.get_filter = lttng_event_rule_uprobe_get_filter;
	urule->parent.get_filter_bytecode =
			lttng_event_rule_uprobe_get_filter_bytecode;
	urule->parent.generate_exclusions =
			lttng_event_rule_uprobe_generate_exclusions;
	urule->parent.hash = lttng_event_rule_uprobe_hash;
end:
	return rule;
}

LTTNG_HIDDEN
ssize_t lttng_event_rule_uprobe_create_from_payload(
		struct lttng_payload_view *view,
		struct lttng_event_rule **_event_rule)
{
	ssize_t ret, offset = 0;
	const struct lttng_event_rule_uprobe_comm *uprobe_comm;
	const char *name;
	struct lttng_buffer_view current_buffer_view;
	struct lttng_event_rule *rule = NULL;
	struct lttng_userspace_probe_location *location;
	struct lttng_event_rule_uprobe *uprobe;
	enum lttng_event_rule_status status;

	if (!_event_rule) {
		ret = -1;
		goto end;
	}

	current_buffer_view = lttng_buffer_view_from_view(
			&view->buffer, offset, sizeof(*uprobe_comm));
	if (!lttng_buffer_view_is_valid(&current_buffer_view)) {
		ERR("Failed to initialize from malformed event rule uprobe: buffer too short to contain header");
		ret = -1;
		goto end;
	}

	uprobe_comm = (typeof(uprobe_comm)) current_buffer_view.data;

	rule = lttng_event_rule_uprobe_create();
	if (!rule) {
		ERR("Failed to create event rule uprobe");
		ret = -1;
		goto end;
	}

	/* Skip to payload. */
	offset += current_buffer_view.size;

	/* Map the name. */
	current_buffer_view = lttng_buffer_view_from_view(
			&view->buffer, offset, uprobe_comm->name_len);
	if (!lttng_buffer_view_is_valid(&current_buffer_view)) {
		ret = -1;
		goto end;
	}

	name = current_buffer_view.data;
	if (!lttng_buffer_view_contains_string(&current_buffer_view, name,
			uprobe_comm->name_len)) {
		ret = -1;
		goto end;
	}

	/* Skip after the name. */
	offset += uprobe_comm->name_len;

	/* Map the location. */
	{
		struct lttng_payload_view current_payload_view =
				lttng_payload_view_from_view(view, offset,
						uprobe_comm->location_len);

		if (!lttng_payload_view_is_valid(&current_payload_view)) {
			ERR("Failed to initialize from malformed event rule uprobe: buffer too short to contain location");
			ret = -1;
			goto end;
		}

		ret = lttng_userspace_probe_location_create_from_payload(
				&current_payload_view, &location);
		if (ret < 0) {
			ret = -1;
			goto end;
		}
	}

	assert(ret == uprobe_comm->location_len);

	/* Skip after the location. */
	offset += uprobe_comm->location_len;

	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	uprobe->location = location;

	status = lttng_event_rule_uprobe_set_name(rule, name);
	if (status != LTTNG_EVENT_RULE_STATUS_OK) {
		ret = -1;
		goto end;
	}

	if (!lttng_event_rule_uprobe_validate(rule)) {
		ret = -1;
		goto end;
	}

	*_event_rule = rule;
	rule = NULL;
	ret = offset;
end:
	lttng_event_rule_destroy(rule);
	return ret;
}

enum lttng_event_rule_status lttng_event_rule_uprobe_set_location(
		struct lttng_event_rule *rule,
		const struct lttng_userspace_probe_location *location)
{
	struct lttng_userspace_probe_location *location_copy = NULL;
	struct lttng_event_rule_uprobe *uprobe;
	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;

	if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !location) {
		status = LTTNG_EVENT_RULE_STATUS_INVALID;
		goto end;
	}

	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	location_copy = lttng_userspace_probe_location_copy(location);
	if (!location_copy) {
		status = LTTNG_EVENT_RULE_STATUS_ERROR;
		goto end;
	}

	if (uprobe->location) {
		lttng_userspace_probe_location_destroy(uprobe->location);
	}

	uprobe->location = location_copy;
	location_copy = NULL;
end:
	lttng_userspace_probe_location_destroy(location_copy);
	return status;
}

enum lttng_event_rule_status lttng_event_rule_uprobe_get_location(
		const struct lttng_event_rule *rule,
		const struct lttng_userspace_probe_location **location)
{
	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;

	if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !location) {
		status = LTTNG_EVENT_RULE_STATUS_INVALID;
		goto end;
	}

	*location = lttng_event_rule_uprobe_get_location_mutable(rule);
	if (!*location) {
		status = LTTNG_EVENT_RULE_STATUS_UNSET;
		goto end;
	}

end:
	return status;
}

LTTNG_HIDDEN
struct lttng_userspace_probe_location *
lttng_event_rule_uprobe_get_location_mutable(
		const struct lttng_event_rule *rule)
{
	struct lttng_event_rule_uprobe *uprobe;

	assert(rule);
	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);

	return uprobe->location;
}

enum lttng_event_rule_status lttng_event_rule_uprobe_set_name(
		struct lttng_event_rule *rule, const char *name)
{
	char *name_copy = NULL;
	struct lttng_event_rule_uprobe *uprobe;
	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;

	if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !name ||
			strlen(name) == 0) {
		status = LTTNG_EVENT_RULE_STATUS_INVALID;
		goto end;
	}

	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	name_copy = strdup(name);
	if (!name_copy) {
		status = LTTNG_EVENT_RULE_STATUS_ERROR;
		goto end;
	}

	if (uprobe->name) {
		free(uprobe->name);
	}

	uprobe->name = name_copy;
	name_copy = NULL;
end:
	return status;
}

enum lttng_event_rule_status lttng_event_rule_uprobe_get_name(
		const struct lttng_event_rule *rule, const char **name)
{
	struct lttng_event_rule_uprobe *uprobe;
	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;

	if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !name) {
		status = LTTNG_EVENT_RULE_STATUS_INVALID;
		goto end;
	}

	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	if (!uprobe->name) {
		status = LTTNG_EVENT_RULE_STATUS_UNSET;
		goto end;
	}

	*name = uprobe->name;
end:
	return status;
}
Commit	Line	Data
df08d338 JR	1	/*
	2	* Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
	3	*
	4	* SPDX-License-Identifier: LGPL-2.1-only
	5	*
	6	*/
	7
	8	#include <assert.h>
58daac01	9	#include <common/credentials.h>
df08d338 JR	10	#include <common/error.h>
	11	#include <common/macros.h>
	12	#include <common/payload.h>
	13	#include <common/payload-view.h>
	14	#include <common/runas.h>
959e3c66 JR	15	#include <common/hashtable/hashtable.h>
959e3c66 JR	16	#include <common/hashtable/utils.h>
df08d338 JR	17	#include <lttng/event-rule/event-rule-internal.h>
	18	#include <lttng/event-rule/uprobe-internal.h>
	19	#include <lttng/userspace-probe-internal.h>
	20
	21	#define IS_UPROBE_EVENT_RULE(rule) \
	22	(lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_UPROBE)
	23
	24	static void lttng_event_rule_uprobe_destroy(struct lttng_event_rule *rule)
	25	{
	26	struct lttng_event_rule_uprobe *uprobe;
	27
	28	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	29
	30	lttng_userspace_probe_location_destroy(uprobe->location);
	31	free(uprobe->name);
	32	free(uprobe);
	33	}
	34
	35	static bool lttng_event_rule_uprobe_validate(
	36	const struct lttng_event_rule *rule)
	37	{
	38	bool valid = false;
	39	struct lttng_event_rule_uprobe *uprobe;
	40
	41	if (!rule) {
	42	goto end;
	43	}
	44
	45	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	46
	47	/* Required field. */
	48	if (!uprobe->name) {
	49	ERR("Invalid uprobe event rule: a pattern must be set.");
	50	goto end;
	51	}
	52
	53	if (!uprobe->location) {
	54	ERR("Invalid uprobe event rule: a location must be set.");
	55	goto end;
	56	}
	57
	58	valid = true;
	59	end:
	60	return valid;
	61	}
	62
	63	static int lttng_event_rule_uprobe_serialize(
	64	const struct lttng_event_rule *rule,
	65	struct lttng_payload *payload)
	66	{
	67	int ret;
	68	size_t name_len, header_offset, size_before_probe;
	69	struct lttng_event_rule_uprobe *uprobe;
	70	struct lttng_event_rule_uprobe_comm uprobe_comm = {};
	71	struct lttng_event_rule_uprobe_comm *header;
	72
	73	if (!rule \|\| !IS_UPROBE_EVENT_RULE(rule)) {
	74	ret = -1;
	75	goto end;
	76	}
	77
	78	header_offset = payload->buffer.size;
	79
	80	DBG("Serializing uprobe event rule.");
81	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
82
83	name_len = strlen(uprobe->name) + 1;
84
85	uprobe_comm.name_len = name_len;
86
87	ret = lttng_dynamic_buffer_append(
88	&payload->buffer, &uprobe_comm, sizeof(uprobe_comm));
89	if (ret) {
90	goto end;
91	}
92	ret = lttng_dynamic_buffer_append(
93	&payload->buffer, uprobe->name, name_len);
94	if (ret) {
95	goto end;
96	}
97
98	size_before_probe = payload->buffer.size;
99
100	/* This serialize return the size taken in the buffer. */
101	ret = lttng_userspace_probe_location_serialize(
102	uprobe->location, payload);
103	if (ret < 0) {
104	goto end;
105	}
106
107	/* Update the header regarding the probe size. */
108	header = (struct lttng_event_rule_uprobe_comm
109	) ((char ) payload->buffer.data +
110	header_offset);
111	header->location_len = payload->buffer.size - size_before_probe;
112
113	ret = 0;
114
115	end:
116	return ret;
117	}
118
119	static bool lttng_event_rule_uprobe_is_equal(const struct lttng_event_rule *_a,
120	const struct lttng_event_rule *_b)
121	{
122	bool is_equal = false;
123	struct lttng_event_rule_uprobe a, b;
124
125	a = container_of(_a, struct lttng_event_rule_uprobe, parent);
126	b = container_of(_b, struct lttng_event_rule_uprobe, parent);
127
128	/* uprobe is invalid if this is not true. */
129	assert(a->name);
130	assert(b->name);
131	if (strcmp(a->name, b->name)) {
132	goto end;
133	}
134
135	assert(a->location);
136	assert(b->location);
137	is_equal = lttng_userspace_probe_location_is_equal(
138	a->location, b->location);
139	end:
140	return is_equal;
141	}
142
143	static enum lttng_error_code lttng_event_rule_uprobe_generate_filter_bytecode(
58daac01 JR	144	struct lttng_event_rule *rule,
58daac01 JR	145	const struct lttng_credentials *creds)
df08d338 JR	146	{
	147	/* Nothing to do. */
	148	return LTTNG_OK;
	149	}
	150
	151	static const char *lttng_event_rule_uprobe_get_filter(
	152	const struct lttng_event_rule *rule)
	153	{
	154	/* Unsupported. */
	155	return NULL;
	156	}
	157
2b00d462	158	static const struct lttng_bytecode *
df08d338 JR	159	lttng_event_rule_uprobe_get_filter_bytecode(const struct lttng_event_rule *rule)
	160	{
	161	/* Unsupported. */
	162	return NULL;
	163	}
	164
993578ff JR	165	static enum lttng_event_rule_generate_exclusions_status
	166	lttng_event_rule_uprobe_generate_exclusions(const struct lttng_event_rule *rule,
	167	struct lttng_event_exclusion **exclusions)
df08d338 JR	168	{
df08d338 JR	169	/* Unsupported. */
993578ff JR	170	*exclusions = NULL;
993578ff JR	171	return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
df08d338 JR	172	}
df08d338 JR	173
959e3c66 JR	174	static unsigned long
	175	lttng_event_rule_uprobe_hash(
	176	const struct lttng_event_rule *rule)
	177	{
	178	unsigned long hash;
	179	struct lttng_event_rule_uprobe *urule =
	180	container_of(rule, typeof(*urule), parent);
	181
	182	hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_UPROBE,
	183	lttng_ht_seed);
	184	hash ^= hash_key_str(urule->name, lttng_ht_seed);
	185	hash ^= lttng_userspace_probe_location_hash(urule->location);
	186
	187	return hash;
	188	}
	189
a3ecaea8	190	struct lttng_event_rule *lttng_event_rule_uprobe_create(void)
df08d338 JR	191	{
	192	struct lttng_event_rule *rule = NULL;
	193	struct lttng_event_rule_uprobe *urule;
	194
	195	urule = zmalloc(sizeof(struct lttng_event_rule_uprobe));
	196	if (!urule) {
	197	goto end;
	198	}
	199
	200	rule = &urule->parent;
	201	lttng_event_rule_init(&urule->parent, LTTNG_EVENT_RULE_TYPE_UPROBE);
	202	urule->parent.validate = lttng_event_rule_uprobe_validate;
	203	urule->parent.serialize = lttng_event_rule_uprobe_serialize;
	204	urule->parent.equal = lttng_event_rule_uprobe_is_equal;
	205	urule->parent.destroy = lttng_event_rule_uprobe_destroy;
	206	urule->parent.generate_filter_bytecode =
	207	lttng_event_rule_uprobe_generate_filter_bytecode;
	208	urule->parent.get_filter = lttng_event_rule_uprobe_get_filter;
	209	urule->parent.get_filter_bytecode =
	210	lttng_event_rule_uprobe_get_filter_bytecode;
	211	urule->parent.generate_exclusions =
	212	lttng_event_rule_uprobe_generate_exclusions;
959e3c66	213	urule->parent.hash = lttng_event_rule_uprobe_hash;
df08d338 JR	214	end:
	215	return rule;
	216	}
	217
	218	LTTNG_HIDDEN
	219	ssize_t lttng_event_rule_uprobe_create_from_payload(
	220	struct lttng_payload_view *view,
	221	struct lttng_event_rule **_event_rule)
	222	{
	223	ssize_t ret, offset = 0;
	224	const struct lttng_event_rule_uprobe_comm *uprobe_comm;
	225	const char *name;
	226	struct lttng_buffer_view current_buffer_view;
	227	struct lttng_event_rule *rule = NULL;
	228	struct lttng_userspace_probe_location *location;
	229	struct lttng_event_rule_uprobe *uprobe;
	230	enum lttng_event_rule_status status;
	231
	232	if (!_event_rule) {
	233	ret = -1;
	234	goto end;
	235	}
	236
df08d338 JR	237	current_buffer_view = lttng_buffer_view_from_view(
df08d338 JR	238	&view->buffer, offset, sizeof(*uprobe_comm));
3e6e0df2 JG	239	if (!lttng_buffer_view_is_valid(&current_buffer_view)) {
3e6e0df2 JG	240	ERR("Failed to initialize from malformed event rule uprobe: buffer too short to contain header");
df08d338 JR	241	ret = -1;
	242	goto end;
	243	}
	244
3e6e0df2 JG	245	uprobe_comm = (typeof(uprobe_comm)) current_buffer_view.data;
3e6e0df2 JG	246
df08d338 JR	247	rule = lttng_event_rule_uprobe_create();
df08d338 JR	248	if (!rule) {
3e6e0df2	249	ERR("Failed to create event rule uprobe");
df08d338 JR	250	ret = -1;
	251	goto end;
	252	}
	253
	254	/* Skip to payload. */
	255	offset += current_buffer_view.size;
	256
	257	/* Map the name. */
	258	current_buffer_view = lttng_buffer_view_from_view(
	259	&view->buffer, offset, uprobe_comm->name_len);
3e6e0df2	260	if (!lttng_buffer_view_is_valid(&current_buffer_view)) {
df08d338 JR	261	ret = -1;
	262	goto end;
	263	}
	264
3e6e0df2	265	name = current_buffer_view.data;
df08d338 JR	266	if (!lttng_buffer_view_contains_string(&current_buffer_view, name,
	267	uprobe_comm->name_len)) {
	268	ret = -1;
	269	goto end;
	270	}
	271
	272	/* Skip after the name. */
	273	offset += uprobe_comm->name_len;
	274
	275	/* Map the location. */
3e6e0df2 JG	276	{
	277	struct lttng_payload_view current_payload_view =
	278	lttng_payload_view_from_view(view, offset,
	279	uprobe_comm->location_len);
	280
	281	if (!lttng_payload_view_is_valid(&current_payload_view)) {
	282	ERR("Failed to initialize from malformed event rule uprobe: buffer too short to contain location");
	283	ret = -1;
	284	goto end;
	285	}
	286
	287	ret = lttng_userspace_probe_location_create_from_payload(
	288	&current_payload_view, &location);
	289	if (ret < 0) {
	290	ret = -1;
	291	goto end;
	292	}
df08d338 JR	293	}
	294
	295	assert(ret == uprobe_comm->location_len);
	296
	297	/* Skip after the location. */
	298	offset += uprobe_comm->location_len;
	299
	300	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	301	uprobe->location = location;
	302
	303	status = lttng_event_rule_uprobe_set_name(rule, name);
	304	if (status != LTTNG_EVENT_RULE_STATUS_OK) {
	305	ret = -1;
	306	goto end;
	307	}
	308
	309	if (!lttng_event_rule_uprobe_validate(rule)) {
	310	ret = -1;
	311	goto end;
	312	}
	313
	314	*_event_rule = rule;
	315	rule = NULL;
	316	ret = offset;
	317	end:
	318	lttng_event_rule_destroy(rule);
	319	return ret;
	320	}
	321
	322	enum lttng_event_rule_status lttng_event_rule_uprobe_set_location(
	323	struct lttng_event_rule *rule,
	324	const struct lttng_userspace_probe_location *location)
	325	{
	326	struct lttng_userspace_probe_location *location_copy = NULL;
	327	struct lttng_event_rule_uprobe *uprobe;
	328	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
	329
	330	if (!rule \|\| !IS_UPROBE_EVENT_RULE(rule) \|\| !location) {
	331	status = LTTNG_EVENT_RULE_STATUS_INVALID;
	332	goto end;
	333	}
	334
	335	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
	336	location_copy = lttng_userspace_probe_location_copy(location);
	337	if (!location_copy) {
	338	status = LTTNG_EVENT_RULE_STATUS_ERROR;
	339	goto end;
	340	}
	341
	342	if (uprobe->location) {
	343	lttng_userspace_probe_location_destroy(uprobe->location);
	344	}
	345
	346	uprobe->location = location_copy;
	347	location_copy = NULL;
	348	end:
	349	lttng_userspace_probe_location_destroy(location_copy);
	350	return status;
	351	}
	352
	353	enum lttng_event_rule_status lttng_event_rule_uprobe_get_location(
	354	const struct lttng_event_rule *rule,
	355	const struct lttng_userspace_probe_location **location)
	356	{
357	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
358
359	if (!rule \|\| !IS_UPROBE_EVENT_RULE(rule) \|\| !location) {
360	status = LTTNG_EVENT_RULE_STATUS_INVALID;
361	goto end;
362	}
363
364	*location = lttng_event_rule_uprobe_get_location_mutable(rule);
365	if (!*location) {
366	status = LTTNG_EVENT_RULE_STATUS_UNSET;
367	goto end;
368	}
369
370	end:
371	return status;
372	}
373
374	LTTNG_HIDDEN
375	struct lttng_userspace_probe_location *
376	lttng_event_rule_uprobe_get_location_mutable(
377	const struct lttng_event_rule *rule)
378	{
379	struct lttng_event_rule_uprobe *uprobe;
380
381	assert(rule);
382	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
383
384	return uprobe->location;
385	}
386
387	enum lttng_event_rule_status lttng_event_rule_uprobe_set_name(
388	struct lttng_event_rule rule, const char name)
389	{
390	char *name_copy = NULL;
391	struct lttng_event_rule_uprobe *uprobe;
392	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
393
394	if (!rule \|\| !IS_UPROBE_EVENT_RULE(rule) \|\| !name \|\|
395	strlen(name) == 0) {
396	status = LTTNG_EVENT_RULE_STATUS_INVALID;
397	goto end;
398	}
399
400	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
401	name_copy = strdup(name);
402	if (!name_copy) {
403	status = LTTNG_EVENT_RULE_STATUS_ERROR;
404	goto end;
405	}
406
407	if (uprobe->name) {
408	free(uprobe->name);
409	}
410
411	uprobe->name = name_copy;
412	name_copy = NULL;
413	end:
414	return status;
415	}
416
417	enum lttng_event_rule_status lttng_event_rule_uprobe_get_name(
418	const struct lttng_event_rule rule, const char *name)
419	{
420	struct lttng_event_rule_uprobe *uprobe;
421	enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
422
423	if (!rule \|\| !IS_UPROBE_EVENT_RULE(rule) \|\| !name) {
424	status = LTTNG_EVENT_RULE_STATUS_INVALID;
425	goto end;
426	}
427
428	uprobe = container_of(rule, struct lttng_event_rule_uprobe, parent);
429	if (!uprobe->name) {
430	status = LTTNG_EVENT_RULE_STATUS_UNSET;
431	goto end;
432	}
433
434	*name = uprobe->name;
435	end:
436	return status;
437	}