[lttng-tools.git] / tests / regression / tools / notification / notification.cpp

/*
 * notification.c
 *
 * Tests suite for LTTng notification API
 *
 * Copyright (C) 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 *
 */

#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <poll.h>

#include <common/compat/errno.hpp>
#include <common/macros.hpp>
#include <lttng/lttng.h>

#include <tap/tap.h>

#define FIELD_NAME_MAX_LEN 256

/* A callback to populate the condition capture descriptor. */
typedef int (*condition_capture_desc_cb)(struct lttng_condition *condition);

/* A callback for captured field validation. */
typedef int (*validate_cb)(const struct lttng_event_field_value *event_field, unsigned iteration);

int nb_args = 0;
int named_pipe_args_start = 0;
pid_t app_pid = 0;
const char *app_state_file = NULL;

enum field_type {
	FIELD_TYPE_PAYLOAD,
	FIELD_TYPE_CONTEXT,
	FIELD_TYPE_APP_CONTEXT,
	FIELD_TYPE_ARRAY_FIELD,
};

namespace {
struct capture_base_field_tuple {
	const char *field_name;
	enum field_type field_type;
	/* Do we expect a userspace capture? */
	bool expected_ust;
	/* Do we expect a kernel capture? */
	bool expected_kernel;
	validate_cb validate_ust;
	validate_cb validate_kernel;
};
} /* namespace */

static
const char *field_value_type_to_str(enum lttng_event_field_value_type type)
{
	switch (type) {
	case LTTNG_EVENT_FIELD_VALUE_TYPE_UNKNOWN:
		return "UNKNOWN";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_INVALID:
		return "INVALID";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT:
		return "UNSIGNED INT";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_INT:
		return "SIGNED INT";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM:
		return "UNSIGNED ENUM";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM:
		return "SIGNED ENUM";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_REAL:
		return "REAL";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_STRING:
		return "STRING";
	case LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY:
		return "ARRAY";
	default:
		abort();
	}
}

static int validate_type(const struct lttng_event_field_value *event_field,
		enum lttng_event_field_value_type expect)
{
	int ret;
	enum lttng_event_field_value_type value;

	value = lttng_event_field_value_get_type(event_field);
	if (value == LTTNG_EVENT_FIELD_VALUE_TYPE_INVALID) {
		ret = 1;
		goto end;
	}

	ok(expect == value, "Expected field type %s, got %s",
			field_value_type_to_str(expect),
			field_value_type_to_str(value));

	ret = expect != value;

end:
	return ret;
}

/*
 * Validate unsigned captured field against the iteration number.
 */
static int validate_unsigned_int_field(
		const struct lttng_event_field_value *event_field,
		unsigned int expected_value)
{
	int ret;
	uint64_t value;
	enum lttng_event_field_value_status status;

	ret = validate_type(
			event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_unsigned_int_get_value(
			event_field, &value);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_unsigned_int_get_value returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(value == (uint64_t) expected_value,
			"Expected unsigned integer value %u, got %" PRIu64,
			expected_value, value);

	ret = value != (uint64_t) expected_value;

end:
	return ret;
}

/*
 * Validate signed captured field.
 */
static int validate_signed_int_field(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	int ret;
	const int64_t expected = -1;
	int64_t value;
	enum lttng_event_field_value_status status;

	/* Unused. */
	(void) iteration;

	ret = validate_type(
			event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_INT);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_signed_int_get_value(
			event_field, &value);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_signed_int_get_value returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(value == expected,
			"Expected signed integer value %" PRId64
			", got %" PRId64,
			expected, value);

	ret = value != expected;

end:

	return ret;
}

/*
 * Validate array of unsigned int.
 */
static int validate_array_unsigned_int_field(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	int ret;
	enum lttng_event_field_value_status status;
	const unsigned int expected = 3;
	unsigned int i, count;

	/* Unused. */
	(void) iteration;

	ret = validate_type(event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_array_get_length(event_field, &count);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_array_get_length");
		ret = 1;
		goto end;
	}

	ok(count == expected, "Expected %d subelements, got %d", expected,
			count);
	if (count != expected) {
		ret = 1;
		goto end;
	}

	for (i = 1; i < count + 1; i++) {
		const struct lttng_event_field_value *value;

		status = lttng_event_field_value_array_get_element_at_index(
				event_field, i - 1, &value);
		if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
			fail("lttng_event_field_value_array_get_element_at_index returned an error: status = %d",
					(int) status);
			ret = 1;
			goto end;
		}

		ret = validate_unsigned_int_field(value, i);
		if (ret) {
			goto end;
		}
	}

	ret = 0;
end:

	return ret;
}

static int validate_array_unsigned_int_field_at_index(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	int ret;
	const uint64_t expected_value = 2;
	enum lttng_event_field_value_status status;
	uint64_t value;

	/* Unused. */
	(void) iteration;

	ret = validate_type(
			event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_unsigned_int_get_value(
			event_field, &value);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_unsigned_int_get_value returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(value == expected_value,
			"Expected unsigned integer value %" PRIu64 ", got %" PRIu64,
			expected_value, value);

	ret = 0;
end:
	return ret;
}

/*
 * Validate sequence for a string (seqfield1):
 *
 * Value: "test" encoded in UTF-8: [116, 101, 115, 116]
 */
static int validate_seqfield1(const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	int ret;
	enum lttng_event_field_value_status status;
	unsigned int i, count;
	const unsigned int expect[] = {116, 101, 115, 116};
	const size_t array_count = sizeof(expect) / sizeof(*expect);

	/* Unused. */
	(void) iteration;

	ret = validate_type(event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_array_get_length(event_field, &count);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_array_get_length returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(count == array_count, "Expected %zu array sub-elements, got %d",
			array_count, count);
	if (count != array_count) {
		ret = 1;
		goto end;
	}

	for (i = 0; i < count; i++) {
		const struct lttng_event_field_value *value;

		status = lttng_event_field_value_array_get_element_at_index(
				event_field, i, &value);
		if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
			fail("lttng_event_field_value_array_get_element_at_index returned an error: status = %d",
					(int) status);
			ret = 1;
			goto end;
		}

		ret = validate_unsigned_int_field(value, expect[i]);
		if (ret) {
			goto end;
		}
	}

	ret = 0;
end:
	return ret;
}

static int validate_string(
		const struct lttng_event_field_value *event_field,
		const char *expect)
{
	int ret;
	const char *value = NULL;
	enum lttng_event_field_value_status status;

	ret = validate_type(event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_STRING);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_string_get_value(event_field, &value);
	if (!value) {
		fail("lttng_event_field_value_array_get_length returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(!strcmp(value, expect), "Expected string value \"%s\", got \"%s\"",
			expect, value);

	ret = 0;
end:

	return ret;
}

/*
 * Validate string. Expected value is "test".
 */
static int validate_string_test(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	const char * const expect = "test";

	/* Unused. */
	(void) iteration;

	return validate_string(event_field, expect);
}

/*
 * Validate escaped string. Expected value is "\*".
 */
static int validate_string_escaped(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	const char * const expect = "\\*";

	/* Unused. */
	(void) iteration;

	return validate_string(event_field, expect);
}

/*
 * Validate real field.
 */
static int validate_real(
		const struct lttng_event_field_value *event_field,
		double expect)
{
	int ret;
	double value;
	enum lttng_event_field_value_status status;

	ret = validate_type(event_field, LTTNG_EVENT_FIELD_VALUE_TYPE_REAL);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_real_get_value(event_field, &value);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_real_get_value returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(value == expect, "Expected real value %f, got %f", expect, value);
	ret = value != expect;
end:
	return ret;
}

/*
 * Validate floatfield.
 */
static int validate_floatfield(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	const double expect = 2222.0;

	/* Unused. */
	(void) iteration;

	return validate_real(event_field, expect);
}

/*
 * Validate doublefield.
 */
static int validate_doublefield(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	const double expect = 2.0;

	/* Unused. */
	(void) iteration;

	return validate_real(event_field, expect);
}

/*
 * Validate enum0: enum0 = ( "AUTO: EXPECT 0" : container = 0 )
 */
static int validate_enum0(const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	int ret;
	enum lttng_event_field_value_status status;
	uint64_t value;
	const uint64_t expected_value = 0;

	/* Unused. */
	(void) iteration;

	ret = validate_type(event_field,
			LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_unsigned_int_get_value(
			event_field, &value);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_unsigned_int_get_value returned an error: status = %d",
				(int) status);
		ret = 1;
		goto end;
	}

	ok(value == expected_value,
			"Expected enum value %" PRIu64 ", got %" PRIu64,
			expected_value, value);

end:
	return ret;
}

/*
 * Validate enumnegative: enumnegative = ( "AUTO: EXPECT 0" : container = 0 )
 *
 * We expect 2 labels here.
 */
static int validate_enumnegative(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	int ret;
	enum lttng_event_field_value_status status;
	int64_t value;
	const int64_t expected_value = -1;

	/* Unused. */
	(void) iteration;

	ret = validate_type(event_field,
			LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM);
	if (ret) {
		goto end;
	}

	status = lttng_event_field_value_signed_int_get_value(
			event_field, &value);
	if (status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("lttng_event_field_value_unsigned_int_get_value");
		ret = 1;
		goto end;
	}

	ok(value == expected_value,
			"Expected enum value %" PRId64 ", got %" PRId64,
			expected_value, value);

end:
	return ret;
}

static int validate_context_procname_ust(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	/* Unused. */
	(void) iteration;
	return validate_string(event_field, "gen-ust-events");
}

static int validate_context_procname_kernel(
		const struct lttng_event_field_value *event_field,
		unsigned int iteration)
{
	/* Unused. */
	(void) iteration;
	return validate_string(event_field, "echo");
}

struct capture_base_field_tuple test_capture_base_fields[] = {
	{ "DOESNOTEXIST", FIELD_TYPE_PAYLOAD, false, false, NULL, NULL },
	{ "intfield", FIELD_TYPE_PAYLOAD, true, true, validate_unsigned_int_field, validate_unsigned_int_field },
	{ "longfield", FIELD_TYPE_PAYLOAD, true, true, validate_unsigned_int_field, validate_unsigned_int_field },
	{ "signedfield", FIELD_TYPE_PAYLOAD, true, true, validate_signed_int_field, validate_signed_int_field },
	{ "arrfield1", FIELD_TYPE_PAYLOAD, true, true, validate_array_unsigned_int_field, validate_array_unsigned_int_field },
	{ "arrfield2", FIELD_TYPE_PAYLOAD, true, true, validate_string_test, validate_string_test },
	{ "arrfield3", FIELD_TYPE_PAYLOAD, true, true, validate_array_unsigned_int_field, validate_array_unsigned_int_field },
	{ "seqfield1", FIELD_TYPE_PAYLOAD, true, true, validate_seqfield1, validate_seqfield1 },
	{ "seqfield2", FIELD_TYPE_PAYLOAD, true, true, validate_string_test, validate_string_test },
	{ "seqfield3", FIELD_TYPE_PAYLOAD, true, true, validate_array_unsigned_int_field, validate_array_unsigned_int_field },
	{ "seqfield4", FIELD_TYPE_PAYLOAD, true, true, validate_array_unsigned_int_field, validate_array_unsigned_int_field },
	{ "arrfield1[1]", FIELD_TYPE_ARRAY_FIELD, true, true, validate_array_unsigned_int_field_at_index, validate_array_unsigned_int_field_at_index },
	{ "stringfield", FIELD_TYPE_PAYLOAD, true, true, validate_string_test, validate_string_test },
	{ "stringfield2", FIELD_TYPE_PAYLOAD, true, true, validate_string_escaped, validate_string_escaped },
	{ "floatfield", FIELD_TYPE_PAYLOAD, true, false, validate_floatfield, validate_floatfield },
	{ "doublefield", FIELD_TYPE_PAYLOAD, true, false, validate_doublefield, validate_doublefield },
	{ "enum0", FIELD_TYPE_PAYLOAD, true, true, validate_enum0, validate_enum0 },
	{ "enumnegative", FIELD_TYPE_PAYLOAD, true, true, validate_enumnegative, validate_enumnegative },
	{ "$ctx.procname", FIELD_TYPE_CONTEXT, true, true, validate_context_procname_ust, validate_context_procname_kernel },
};

static const char *get_notification_trigger_name(
		struct lttng_notification *notification)
{
	const char *trigger_name = NULL;
	enum lttng_trigger_status trigger_status;
	const struct lttng_trigger *trigger;

	trigger = lttng_notification_get_trigger(notification);
	if (!trigger) {
		fail("Failed to get trigger from notification");
		goto end;
	}

	trigger_status = lttng_trigger_get_name(trigger, &trigger_name);
	switch (trigger_status) {
	case LTTNG_TRIGGER_STATUS_OK:
		break;
	case LTTNG_TRIGGER_STATUS_UNSET:
		trigger_name = "(anonymous)";
		break;
	default:
		fail("Failed to get name from notification's trigger");
		goto end;
	}

end:
	return trigger_name;
}

static int validator_notification_trigger_name(
		struct lttng_notification *notification,
		const char *trigger_name)
{
	int ret;
	bool name_is_equal;
	const char *name;

	LTTNG_ASSERT(notification);
	LTTNG_ASSERT(trigger_name);

	name = get_notification_trigger_name(notification);
	if (name == NULL) {
		ret = 1;
		goto end;
	}

	name_is_equal = (strcmp(trigger_name, name) == 0);
	ok(name_is_equal, "Expected trigger name: %s got %s", trigger_name,
			name);

	ret = !name_is_equal;

end:
	return ret;
}

static
void wait_on_file(const char *path, bool file_exist)
{
	if (!path) {
		return;
	}
	for (;;) {
		int ret;
		struct stat buf;

		ret = stat(path, &buf);
		if (ret == -1 && errno == ENOENT) {
			if (file_exist) {
				/*
				 * The file does not exist. wait a bit and
				 * continue looping until it does.
				 */
				(void) poll(NULL, 0, 10);
				continue;
			}

			/*
			 * File does not exist and the exit condition we want.
			 * Break from the loop and return.
			 */
			break;
		}
		if (ret) {
			perror("stat");
			exit(EXIT_FAILURE);
		}
		/*
		 * stat() returned 0, so the file exists. break now only if
		 * that's the exit condition we want.
		 */
		if (file_exist) {
			break;
		}
	}
}

static
int write_pipe(const char *path, uint8_t data)
{
	int ret = 0;
	int fd = 0;

	fd = open(path, O_WRONLY | O_NONBLOCK);
	if (fd < 0) {
		perror("Could not open consumer control named pipe");
		goto end;
	}

	ret = write(fd, &data , sizeof(data));
	if (ret < 1) {
		perror("Named pipe write failed");
		if (close(fd)) {
			perror("Named pipe close failed");
		}
		ret = -1;
		goto end;
	}

	ret = close(fd);
	if (ret < 0) {
		perror("Name pipe closing failed");
		ret = -1;
		goto end;
	}
end:
	return ret;
}

static
int stop_consumer(const char **argv)
{
	int ret = 0, i;

	for (i = named_pipe_args_start; i < nb_args; i++) {
		ret = write_pipe(argv[i], 49);
	}
	return ret;
}

static
int resume_consumer(const char **argv)
{
	int ret = 0, i;

	for (i = named_pipe_args_start; i < nb_args; i++) {
		ret = write_pipe(argv[i], 0);
	}
	return ret;
}

static
int suspend_application(void)
{
	int ret;
	struct stat buf;

	if (!stat(app_state_file, &buf)) {
		fail("App is already in a suspended state.");
		ret = -1;
		goto error;
	}

	/*
	 * Send SIGUSR1 to application instructing it to bypass tracepoint.
	 */
	LTTNG_ASSERT(app_pid > 1);

	ret = kill(app_pid, SIGUSR1);
	if (ret) {
		fail("SIGUSR1 failed. errno %d", errno);
		ret = -1;
		goto error;
	}

	wait_on_file(app_state_file, true);

error:
	return ret;

}

static
int resume_application(void)
{
	int ret;
	struct stat buf;

	ret = stat(app_state_file, &buf);
	if (ret == -1 && errno == ENOENT) {
		fail("State file does not exist");
		goto error;
	}
	if (ret) {
		perror("stat");
		goto error;
	}

	LTTNG_ASSERT(app_pid > 1);

	ret = kill(app_pid, SIGUSR1);
	if (ret) {
		fail("SIGUSR1 failed. errno %d", errno);
		ret = -1;
		goto error;
	}

	wait_on_file(app_state_file, false);

error:
	return ret;

}


static
void test_triggers_buffer_usage_condition(const char *session_name,
		const char *channel_name,
		enum lttng_condition_type condition_type)
{
	unsigned int test_vector_size = 5, i;
	enum lttng_condition_status condition_status;
	struct lttng_action *action;

	/* Set-up */
	action = lttng_action_notify_create();
	if (!action) {
		fail("Setup error on action creation");
		goto end;
	}

	/* Test lttng_register_trigger with null value */
	ok(lttng_register_trigger(NULL) == -LTTNG_ERR_INVALID, "Registering a NULL trigger fails as expected");

	/* Test: register a trigger */

	for (i = 0; i < pow(2,test_vector_size); i++) {
		int loop_ret = 0;
		char *test_tuple_string = NULL;
		unsigned int mask_position = 0;
		bool session_name_set = false;
		bool channel_name_set = false;
		bool threshold_ratio_set = false;
		bool threshold_byte_set = false;
		bool domain_type_set = false;

		struct lttng_trigger *trigger = NULL;
		struct lttng_condition *condition = NULL;

		/* Create base condition */
		switch (condition_type) {
		case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
			condition = lttng_condition_buffer_usage_low_create();
			break;
		case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
			condition = lttng_condition_buffer_usage_high_create();
			break;
		default:
			loop_ret = 1;
			goto loop_end;
		}

		if (!condition) {
			loop_ret = 1;
			goto loop_end;

		}

		/* Prepare the condition for trigger registration test */

		/* Set session name */
		if ((1 << mask_position) & i) {
			condition_status = lttng_condition_buffer_usage_set_session_name(
					condition, session_name);
			if (condition_status != LTTNG_CONDITION_STATUS_OK) {
				loop_ret = 1;
				goto loop_end;
			}
			session_name_set = true;
		}
		mask_position++;

		/* Set channel name */
		if ((1 << mask_position) & i) {
			condition_status = lttng_condition_buffer_usage_set_channel_name(
					condition, channel_name);
			if (condition_status != LTTNG_CONDITION_STATUS_OK) {
				loop_ret = 1;
				goto loop_end;
			}
			channel_name_set = true;
		}
		mask_position++;

		/* Set threshold ratio */
		if ((1 << mask_position) & i) {
			condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
					condition, 0.0);
			if (condition_status != LTTNG_CONDITION_STATUS_OK) {
				loop_ret = 1;
				goto loop_end;
			}
			threshold_ratio_set = true;
		}
		mask_position++;

		/* Set threshold byte */
		if ((1 << mask_position) & i) {
			condition_status = lttng_condition_buffer_usage_set_threshold(
					condition, 0);
			if (condition_status != LTTNG_CONDITION_STATUS_OK) {
				loop_ret = 1;
				goto loop_end;
			}
			threshold_byte_set = true;
		}
		mask_position++;

		/* Set domain type */
		if ((1 << mask_position) & i) {
			condition_status = lttng_condition_buffer_usage_set_domain_type(
					condition, LTTNG_DOMAIN_UST);
			if (condition_status != LTTNG_CONDITION_STATUS_OK) {
				loop_ret = 1;
				goto loop_end;
			}
			domain_type_set = true;
		}

		/* Safety check */
		if (mask_position != test_vector_size -1) {
			LTTNG_ASSERT("Logic error for test vector generation");
		}

		loop_ret = asprintf(&test_tuple_string, "session name %s, channel name %s, threshold ratio %s, threshold byte %s, domain type %s",
				session_name_set ? "set" : "unset",
				channel_name_set ? "set" : "unset",
				threshold_ratio_set ? "set" : "unset",
				threshold_byte_set ? "set" : "unset",
				domain_type_set? "set" : "unset");
		if (!test_tuple_string || loop_ret < 0) {
			loop_ret = 1;
			goto loop_end;
		}

		/* Create trigger */
		trigger = lttng_trigger_create(condition, action);
		if (!trigger) {
			loop_ret = 1;
			goto loop_end;
		}

		loop_ret = lttng_register_trigger(trigger);

loop_end:
		if (loop_ret == 1) {
			fail("Setup error occurred for tuple: %s", test_tuple_string);
			goto loop_cleanup;
		}

		/* This combination happens three times */
		if (session_name_set && channel_name_set
				&& (threshold_ratio_set || threshold_byte_set)
				&& domain_type_set) {
			ok(loop_ret == 0, "Trigger is registered: %s", test_tuple_string);

			/*
			 * Test that a trigger cannot be registered
			 * multiple time.
			 */
			loop_ret = lttng_register_trigger(trigger);
			ok(loop_ret == -LTTNG_ERR_TRIGGER_EXISTS, "Re-register trigger fails as expected: %s", test_tuple_string);

			/* Test that a trigger can be unregistered */
			loop_ret = lttng_unregister_trigger(trigger);
			ok(loop_ret == 0, "Unregister trigger: %s", test_tuple_string);

			/*
			 * Test that unregistration of a non-previously
			 * registered trigger fail.
			 */
			loop_ret = lttng_unregister_trigger(trigger);
			ok(loop_ret == -LTTNG_ERR_TRIGGER_NOT_FOUND, "Unregister of a non-registered trigger fails as expected: %s", test_tuple_string);
		} else {
			ok(loop_ret == -LTTNG_ERR_INVALID_TRIGGER, "Trigger is invalid as expected and cannot be registered: %s", test_tuple_string);
		}

loop_cleanup:
		free(test_tuple_string);
		lttng_trigger_destroy(trigger);
		lttng_condition_destroy(condition);
	}

end:
	lttng_action_destroy(action);
}

static
void wait_data_pending(const char *session_name)
{
	int ret;

	do {
		ret = lttng_data_pending(session_name);
		LTTNG_ASSERT(ret >= 0);
	} while (ret != 0);
}

static
int setup_buffer_usage_condition(struct lttng_condition *condition,
		const char *condition_name,
		const char *session_name,
		const char *channel_name,
		const enum lttng_domain_type domain_type)
{
	enum lttng_condition_status condition_status;
	int ret = 0;

	condition_status = lttng_condition_buffer_usage_set_session_name(
			condition, session_name);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		fail("Failed to set session name on creation of condition `%s`",
				condition_name);
		ret = -1;
		goto end;
	}

	condition_status = lttng_condition_buffer_usage_set_channel_name(
			condition, channel_name);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		fail("Failed to set channel name on creation of condition `%s`",
				condition_name);
		ret = -1;
		goto end;
	}

	condition_status = lttng_condition_buffer_usage_set_domain_type(
			condition, domain_type);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		fail("Failed to set domain type on creation of condition `%s`",
				condition_name);
		ret = -1;
		goto end;
	}

end:
	return ret;
}

static
void test_invalid_channel_subscription(
		const enum lttng_domain_type domain_type)
{
	enum lttng_condition_status condition_status;
	enum lttng_notification_channel_status nc_status;
	struct lttng_condition *dummy_condition = NULL;
	struct lttng_condition *dummy_invalid_condition = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	int ret = 0;

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");
	if (!notification_channel) {
		goto end;
	}

	/*
	 * Create a dummy, empty (thus invalid) condition to test error paths.
	 */
	dummy_invalid_condition = lttng_condition_buffer_usage_low_create();
	if (!dummy_invalid_condition) {
		fail("Setup error on condition creation");
		goto end;
	}

	/*
	 * Test subscription and unsubscription of an invalid condition to/from
	 * a channel.
	 */
	nc_status = lttng_notification_channel_subscribe(
			notification_channel, dummy_invalid_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID,
			"Subscribing to an invalid condition");

	nc_status = lttng_notification_channel_unsubscribe(
			notification_channel, dummy_invalid_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID,
			"Unsubscribing from an invalid condition");

	/* Create a valid dummy condition with a ratio of 0.5 */
	dummy_condition = lttng_condition_buffer_usage_low_create();
	if (!dummy_condition) {
		fail("Setup error on dummy_condition creation");
		goto end;
	}

	condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
			dummy_condition, 0.5);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		fail("Setup error on condition creation");
		goto end;
	}

	ret = setup_buffer_usage_condition(dummy_condition, "dummy_condition",
			"dummy_session", "dummy_channel", domain_type);
	if (ret) {
		fail("Setup error on dummy condition creation");
		goto end;
	}

	/*
	 * Test subscription and unsubscription to/from a channel with invalid
	 * parameters.
	 */
	nc_status = lttng_notification_channel_subscribe(NULL, NULL);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID,
			"Notification channel subscription is invalid: NULL, NULL");

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, NULL);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID,
			"Notification channel subscription is invalid: NON-NULL, NULL");

	nc_status = lttng_notification_channel_subscribe(NULL, dummy_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID,
			"Notification channel subscription is invalid: NULL, NON-NULL");

	nc_status = lttng_notification_channel_unsubscribe(
			notification_channel, dummy_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_UNKNOWN_CONDITION,
			"Unsubscribing from a valid unknown condition");

end:
	lttng_notification_channel_destroy(notification_channel);
	lttng_condition_destroy(dummy_invalid_condition);
	lttng_condition_destroy(dummy_condition);
	return;
}

enum buffer_usage_type {
	BUFFER_USAGE_TYPE_LOW,
	BUFFER_USAGE_TYPE_HIGH,
};

static int register_buffer_usage_notify_trigger(const char *session_name,
		const char *channel_name,
		const enum lttng_domain_type domain_type,
		enum buffer_usage_type buffer_usage_type,
		double ratio,
		struct lttng_condition **condition,
		struct lttng_action **action,
		struct lttng_trigger **trigger)
{
	enum lttng_condition_status condition_status;
	struct lttng_action *tmp_action = NULL;
	struct lttng_condition *tmp_condition = NULL;
	struct lttng_trigger *tmp_trigger = NULL;
	int ret = 0;

	/* Set-up */
	tmp_action = lttng_action_notify_create();
	if (!action) {
		fail("Setup error on action creation");
		ret = -1;
		goto error;
	}

	if (buffer_usage_type == BUFFER_USAGE_TYPE_LOW) {
		tmp_condition = lttng_condition_buffer_usage_low_create();
	} else {
		tmp_condition = lttng_condition_buffer_usage_high_create();
	}

	if (!tmp_condition) {
		fail("Setup error on condition creation");
		ret = -1;
		goto error;
	}

	/* Set the buffer usage threashold */
	condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
			tmp_condition, ratio);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		fail("Setup error on condition creation");
		ret = -1;
		goto error;
	}

	ret = setup_buffer_usage_condition(tmp_condition, "condition_name",
			session_name, channel_name, domain_type);
	if (ret) {
		fail("Setup error on condition creation");
		ret = -1;
		goto error;
	}

	/* Register the trigger for condition. */
	tmp_trigger = lttng_trigger_create(tmp_condition, tmp_action);
	if (!tmp_trigger) {
		fail("Setup error on trigger creation");
		ret = -1;
		goto error;
	}

	ret = lttng_register_trigger(tmp_trigger);
	if (ret) {
		fail("Setup error on trigger registration");
		ret = -1;
		goto error;
	}

	*condition = tmp_condition;
	*trigger = tmp_trigger;
	*action = tmp_action;
	goto end;

error:
	lttng_action_destroy(tmp_action);
	lttng_condition_destroy(tmp_condition);
	lttng_trigger_destroy(tmp_trigger);

end:
	return ret;
}

static void test_subscription_twice(const char *session_name,
		const char *channel_name,
		const enum lttng_domain_type domain_type)
{
	int ret = 0;
	enum lttng_notification_channel_status nc_status;

	struct lttng_action *action = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_trigger *trigger = NULL;

	struct lttng_condition *condition = NULL;

	ret = register_buffer_usage_notify_trigger(session_name, channel_name,
			domain_type, BUFFER_USAGE_TYPE_LOW, 0.99, &condition,
			&action, &trigger);
	if (ret) {
		fail("Setup error on trigger registration in %s()",
				__FUNCTION__);
		goto end;
	}

	/* Begin testing. */
	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");
	if (!notification_channel) {
		goto end;
	}

	/* Subscribe a valid condition. */
	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to condition");

	/* Subscribing again should fail. */
	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_ALREADY_SUBSCRIBED,
			"Subscribe to a condition for which subscription was already done");

end:
	ret = lttng_unregister_trigger(trigger);
	if (ret) {
		fail("Failed to unregister trigger in %s()", __FUNCTION__);
	}

	lttng_trigger_destroy(trigger);
	lttng_notification_channel_destroy(notification_channel);
	lttng_action_destroy(action);
	lttng_condition_destroy(condition);
}

static void test_buffer_usage_notification_channel(const char *session_name,
		const char *channel_name,
		const enum lttng_domain_type domain_type,
		const char **argv)
{
	int ret = 0;
	enum lttng_notification_channel_status nc_status;

	struct lttng_action *low_action = NULL;
	struct lttng_action *high_action = NULL;
	struct lttng_notification *notification = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_trigger *low_trigger = NULL;
	struct lttng_trigger *high_trigger = NULL;

	struct lttng_condition *low_condition = NULL;
	struct lttng_condition *high_condition = NULL;

	const double low_ratio = 0.0;
	const double high_ratio = 0.90;

	ret = register_buffer_usage_notify_trigger(session_name, channel_name,
			domain_type, BUFFER_USAGE_TYPE_LOW, low_ratio,
			&low_condition, &low_action, &low_trigger);
	if (ret) {
		fail("Setup error on low trigger registration");
		goto end;
	}

	ret = register_buffer_usage_notify_trigger(session_name, channel_name,
			domain_type, BUFFER_USAGE_TYPE_HIGH, high_ratio,
			&high_condition, &high_action, &high_trigger);
	if (ret) {
		fail("Setup error on high trigger registration");
		goto end;
	}

	/* Begin testing */
	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");
	if (!notification_channel) {
		goto end;
	}

	/* Subscribe a valid low condition */
	nc_status = lttng_notification_channel_subscribe(
			notification_channel, low_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to low condition");

	/* Subscribe a valid high condition */
	nc_status = lttng_notification_channel_subscribe(
			notification_channel, high_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to high condition");

	resume_application();

	/* Wait for notification to happen */
	stop_consumer(argv);
	lttng_start_tracing(session_name);

	/* Wait for high notification */
	do {
		nc_status = lttng_notification_channel_get_next_notification(
				notification_channel, &notification);
	} while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
					lttng_condition_get_type(lttng_notification_get_condition(
							notification)) ==
							LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
			"High notification received after intermediary communication");
	lttng_notification_destroy(notification);
	notification = NULL;

	suspend_application();
	lttng_stop_tracing_no_wait(session_name);
	resume_consumer(argv);
	wait_data_pending(session_name);

	/*
	 * Test that communication still work even if there is notification
	 * waiting for consumption.
	 */

	nc_status = lttng_notification_channel_unsubscribe(
			notification_channel, low_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Unsubscribe with pending notification");

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, low_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe with pending notification");

	do {
		nc_status = lttng_notification_channel_get_next_notification(
				notification_channel, &notification);
	} while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
					lttng_condition_get_type(lttng_notification_get_condition(
							notification)) ==
							LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW,
			"Low notification received after intermediary communication");
	lttng_notification_destroy(notification);
	notification = NULL;

	/* Stop consumer to force a high notification */
	stop_consumer(argv);
	resume_application();
	lttng_start_tracing(session_name);

	do {
		nc_status = lttng_notification_channel_get_next_notification(
				notification_channel, &notification);
	} while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
					lttng_condition_get_type(lttng_notification_get_condition(
							notification)) ==
							LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
			"High notification received after intermediary communication");
	lttng_notification_destroy(notification);
	notification = NULL;

	suspend_application();
	lttng_stop_tracing_no_wait(session_name);
	resume_consumer(argv);
	wait_data_pending(session_name);

	do {
		nc_status = lttng_notification_channel_get_next_notification(
				notification_channel, &notification);
	} while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
					lttng_condition_get_type(lttng_notification_get_condition(
							notification)) ==
							LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW,
			"Low notification received after re-subscription");
	lttng_notification_destroy(notification);
	notification = NULL;

	stop_consumer(argv);
	resume_application();
	/* Stop consumer to force a high notification */
	lttng_start_tracing(session_name);

	do {
		nc_status = lttng_notification_channel_get_next_notification(
				notification_channel, &notification);
	} while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
					lttng_condition_get_type(lttng_notification_get_condition(
							notification)) ==
							LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
			"High notification");
	lttng_notification_destroy(notification);
	notification = NULL;

	suspend_application();

	/* Resume consumer to allow event consumption */
	lttng_stop_tracing_no_wait(session_name);
	resume_consumer(argv);
	wait_data_pending(session_name);

	nc_status = lttng_notification_channel_unsubscribe(
			notification_channel, low_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Unsubscribe low condition with pending notification");

	nc_status = lttng_notification_channel_unsubscribe(
			notification_channel, high_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Unsubscribe high condition with pending notification");

end:
	lttng_notification_channel_destroy(notification_channel);
	lttng_trigger_destroy(low_trigger);
	lttng_trigger_destroy(high_trigger);
	lttng_action_destroy(low_action);
	lttng_action_destroy(high_action);
	lttng_condition_destroy(low_condition);
	lttng_condition_destroy(high_condition);
}

static void create_tracepoint_event_rule_trigger(const char *event_pattern,
		const char *trigger_name,
		const char *filter,
		unsigned int exclusion_count,
		const char * const *exclusions,
		enum lttng_domain_type domain_type,
		condition_capture_desc_cb capture_desc_cb,
		struct lttng_condition **condition,
		struct lttng_trigger **trigger)
{
	typedef struct lttng_event_rule *(*event_rule_create)(void);
	typedef enum lttng_event_rule_status (
			*event_rule_set_name_pattern)(
			struct lttng_event_rule *rule,
			const char *pattern);
	typedef enum lttng_event_rule_status (*event_rule_set_filter)(
			struct lttng_event_rule *rule,
			const char *expression);
	typedef enum lttng_event_rule_status (
			*event_rule_add_name_pattern_exclusion)(
			struct lttng_event_rule * rule, const char *exclusion);

	enum lttng_event_rule_status event_rule_status;
	struct lttng_action *tmp_action = NULL;
	struct lttng_event_rule *event_rule = NULL;
	struct lttng_condition *tmp_condition = NULL;
	struct lttng_trigger *tmp_trigger = NULL;
	int ret;
	enum lttng_error_code ret_code;
	event_rule_create create;
	event_rule_set_name_pattern set_name_pattern;
	event_rule_set_filter set_filter;
	event_rule_add_name_pattern_exclusion add_name_pattern_exclusion;

	LTTNG_ASSERT(event_pattern);
	LTTNG_ASSERT(trigger_name);
	LTTNG_ASSERT(condition);
	LTTNG_ASSERT(trigger);

	/* Set the function pointers based on the domain type. */
	switch (domain_type) {
	case LTTNG_DOMAIN_UST:
		create = lttng_event_rule_user_tracepoint_create;
		set_name_pattern = lttng_event_rule_user_tracepoint_set_name_pattern;
		set_filter = lttng_event_rule_user_tracepoint_set_filter;
		add_name_pattern_exclusion = lttng_event_rule_user_tracepoint_add_name_pattern_exclusion;
		break;
	case LTTNG_DOMAIN_KERNEL:
		create = lttng_event_rule_kernel_tracepoint_create;
		set_name_pattern = lttng_event_rule_kernel_tracepoint_set_name_pattern;
		set_filter = lttng_event_rule_kernel_tracepoint_set_filter;
		add_name_pattern_exclusion = NULL;
		break;
	default:
		abort();
		break;
	}

	event_rule = create();
	ok(event_rule, "Tracepoint event rule object creation");

	event_rule_status = set_name_pattern(event_rule, event_pattern);
	ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
			"Setting tracepoint event rule pattern: '%s'",
			event_pattern);

	if (filter) {
		event_rule_status = set_filter(event_rule, filter);
		ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
				"Setting tracepoint event rule filter: '%s'",
				filter);
	}

	if (exclusions) {
		int i;
		bool success = true;

		LTTNG_ASSERT(domain_type == LTTNG_DOMAIN_UST);
		LTTNG_ASSERT(add_name_pattern_exclusion != NULL);
		LTTNG_ASSERT(exclusion_count > 0);

		for (i = 0; i < exclusion_count; i++) {
			event_rule_status = add_name_pattern_exclusion(
					event_rule, exclusions[i]);
			if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) {
				fail("Setting tracepoint event rule exclusion '%s'.",
						exclusions[i]);
				success = false;
			}
		}

		ok(success, "Setting tracepoint event rule exclusions");
	}

	tmp_condition = lttng_condition_event_rule_matches_create(event_rule);
	ok(tmp_condition, "Condition event rule object creation");

	if (capture_desc_cb) {
		ret = capture_desc_cb(tmp_condition);
		if (ret) {
			fail("Failed to generate the condition capture descriptor");
			abort();
		}
	}

	tmp_action = lttng_action_notify_create();
	ok(tmp_action, "Action event rule object creation");

	tmp_trigger = lttng_trigger_create(tmp_condition, tmp_action);
	ok(tmp_trigger, "Trigger object creation %s", trigger_name);

	ret_code = lttng_register_trigger_with_name(tmp_trigger, trigger_name);
	ok(ret_code == LTTNG_OK, "Trigger registration %s", trigger_name);

	lttng_event_rule_destroy(event_rule);

	*condition = tmp_condition;
	*trigger = tmp_trigger;

	return;
}

static struct lttng_notification *get_next_notification(
		struct lttng_notification_channel *notification_channel)
{
	struct lttng_notification *local_notification = NULL;
	enum lttng_notification_channel_status status;

	/* Receive the next notification. */
	status = lttng_notification_channel_get_next_notification(
			notification_channel, &local_notification);

	switch (status) {
	case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK:
		break;
	case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED:
		fail("Notifications have been dropped");
		local_notification = NULL;
		break;
	default:
		/* Unhandled conditions / errors. */
		fail("Failed to get next notification (unknown notification channel status): status = %d",
				(int) status);
		local_notification = NULL;
		break;
	}

	return local_notification;
}

static void test_tracepoint_event_rule_notification(
		enum lttng_domain_type domain_type)
{
	int i;
	int ret;
	const int notification_count = 3;
	enum lttng_notification_channel_status nc_status;
	struct lttng_action *action = NULL;
	struct lttng_condition *condition = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_trigger *trigger = NULL;
	const char * const trigger_name = "my_precious";
	const char *pattern;

	if (domain_type == LTTNG_DOMAIN_UST) {
		pattern = "tp:tptest";
	} else {
		pattern = "lttng_test_filter_event";
	}

	create_tracepoint_event_rule_trigger(pattern, trigger_name, NULL, 0,
			NULL, domain_type, NULL, &condition, &trigger);

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	resume_application();

	/* Get notifications. */
	for (i = 0; i < notification_count; i++) {
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		ret = validator_notification_trigger_name(notification, trigger_name);
		lttng_notification_destroy(notification);
		if (ret) {
			goto end;
		}
	}

end:
	suspend_application();
	lttng_notification_channel_destroy(notification_channel);
	lttng_unregister_trigger(trigger);
	lttng_trigger_destroy(trigger);
	lttng_action_destroy(action);
	lttng_condition_destroy(condition);
	return;
}

static void test_tracepoint_event_rule_notification_filter(
		enum lttng_domain_type domain_type)
{
	int i;
	const int notification_count = 3;
	enum lttng_notification_channel_status nc_status;
	struct lttng_condition *ctrl_condition = NULL, *condition = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_trigger *ctrl_trigger = NULL, *trigger = NULL;
	const char * const ctrl_trigger_name = "control_trigger";
	const char * const trigger_name = "trigger";
	const char *pattern;
	int ctrl_count = 0, count = 0;

	if (domain_type == LTTNG_DOMAIN_UST) {
		pattern = "tp:tptest";
	} else {
		pattern = "lttng_test_filter_event";
	}

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	create_tracepoint_event_rule_trigger(pattern, ctrl_trigger_name, NULL,
			0, NULL, domain_type, NULL, &ctrl_condition, &ctrl_trigger);

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, ctrl_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	/*
	 * Attach a filter expression to get notification only if the
	 * `intfield` is even.
	 */
	create_tracepoint_event_rule_trigger(pattern, trigger_name,
			"(intfield & 1) == 0", 0, NULL, domain_type, NULL, &condition,
			&trigger);

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	/*
	 * We registered 2 notifications triggers, one with a filter and one
	 * without (control). The one with a filter will only fired when the
	 * `intfield` is a multiple of 2. We should get two times as many
	 * control notifications as filter notifications.
	 */
	resume_application();

	/*
	 * Get 3 notifications. We should get 1 for the regular trigger (with
	 * the filter) and 2 from the control trigger. This works whatever
	 * the order we receive the notifications.
	 */
	for (i = 0; i < notification_count; i++) {
		const char *name;
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		name = get_notification_trigger_name(notification);
		if (name == NULL) {
			lttng_notification_destroy(notification);
			goto end;
		}

		if (strcmp(ctrl_trigger_name, name) == 0) {
			ctrl_count++;
		} else if (strcmp(trigger_name, name) == 0) {
			count++;
		}

		lttng_notification_destroy(notification);
	}

	ok(ctrl_count / 2 == count,
			"Get twice as many control notif as of regular notif");

end:
	suspend_application();

	lttng_unregister_trigger(trigger);
	lttng_unregister_trigger(ctrl_trigger);
	lttng_notification_channel_destroy(notification_channel);
	lttng_trigger_destroy(trigger);
	lttng_trigger_destroy(ctrl_trigger);
	lttng_condition_destroy(condition);
	lttng_condition_destroy(ctrl_condition);
}

static void test_tracepoint_event_rule_notification_exclusion(
		enum lttng_domain_type domain_type)
{
	enum lttng_notification_channel_status nc_status;
	struct lttng_condition *ctrl_condition = NULL, *condition = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_trigger *ctrl_trigger = NULL, *trigger = NULL;
	int ctrl_count = 0, count = 0, i;
	const int notification_count = 6;
	const char * const ctrl_trigger_name = "control_exclusion_trigger";
	const char * const trigger_name = "exclusion_trigger";
	const char * const pattern = "tp:tptest*";
	const char * const exclusions[] = {
		"tp:tptest2",
		"tp:tptest3",
		"tp:tptest4",
		"tp:tptest5"
	};

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	create_tracepoint_event_rule_trigger(pattern, ctrl_trigger_name, NULL,
			0, NULL, domain_type, NULL, &ctrl_condition,
			&ctrl_trigger);

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, ctrl_condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	create_tracepoint_event_rule_trigger(pattern, trigger_name, NULL, 4,
			exclusions, domain_type, NULL, &condition,
			&trigger);

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	/*
	 * We registered 2 notifications triggers, one with an exclusion and
	 * one without (control).
	 * - The trigger with an exclusion will fire once every iteration.
	 * - The trigger without an exclusion will fire 5 times every
	 *   iteration.
	 *
	 *   We should get 5 times as many notifications from the control
	 *   trigger.
	 */
	resume_application();

	/*
	 * Get 6 notifications. We should get 1 for the regular trigger (with
	 * the exclusion) and 5 from the control trigger. This works whatever
	 * the order we receive the notifications.
	 */
	for (i = 0; i < notification_count; i++) {
		const char *name;
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		name = get_notification_trigger_name(notification);
		if (name == NULL) {
			lttng_notification_destroy(notification);
			goto end;
		}

		if (strcmp(ctrl_trigger_name, name) == 0) {
			ctrl_count++;
		} else if (strcmp(trigger_name, name) == 0) {
			count++;
		}

		lttng_notification_destroy(notification);
	}

	ok(ctrl_count / 5 == count,
			"Got 5 times as many control notif as of regular notif");

end:
	suspend_application();

	lttng_unregister_trigger(trigger);
	lttng_unregister_trigger(ctrl_trigger);
	lttng_notification_channel_destroy(notification_channel);
	lttng_trigger_destroy(trigger);
	lttng_trigger_destroy(ctrl_trigger);
	lttng_condition_destroy(condition);
	lttng_condition_destroy(ctrl_condition);
	return;
}

static void test_kprobe_event_rule_notification(void)
{
	int i, ret;
	enum lttng_error_code ret_code;
	const int notification_count = 3;
	enum lttng_notification_channel_status nc_status;
	enum lttng_event_rule_status event_rule_status;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_condition *condition = NULL;
	struct lttng_kernel_probe_location *location = NULL;
	struct lttng_event_rule *event_rule = NULL;
	struct lttng_action *action = NULL;
	struct lttng_trigger *trigger = NULL;
	const char * const trigger_name = "kprobe_trigger";
	const char * const symbol_name = "lttng_test_filter_event_write";

	action = lttng_action_notify_create();
	if (!action) {
		fail("Failed to create notify action");
		goto end;
	}

	location = lttng_kernel_probe_location_symbol_create(symbol_name, 0);
	if (!location) {
		fail("Failed to create kernel probe location");
		goto end;
	}

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	event_rule = lttng_event_rule_kernel_kprobe_create(location);
	ok(event_rule, "kprobe event rule object creation");

	event_rule_status = lttng_event_rule_kernel_kprobe_set_event_name(
			event_rule, trigger_name);
	ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
			"Setting kprobe event rule name: '%s'", trigger_name);

	condition = lttng_condition_event_rule_matches_create(event_rule);
	ok(condition, "Condition event rule object creation");

	/* Register the trigger for condition. */
	trigger = lttng_trigger_create(condition, action);
	if (!trigger) {
		fail("Failed to create trigger with kernel probe event rule condition and notify action");
		goto end;
	}

	ret_code = lttng_register_trigger_with_name(trigger, trigger_name);
	if (ret_code != LTTNG_OK) {
		fail("Failed to register trigger with kernel probe event rule condition and notify action");
		goto end;
	}

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	resume_application();

	for (i = 0; i < notification_count; i++) {
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		ret = validator_notification_trigger_name(notification, trigger_name);
		lttng_notification_destroy(notification);
		if (ret) {
			goto end;
		}
	}

end:
	suspend_application();
	lttng_notification_channel_destroy(notification_channel);
	lttng_unregister_trigger(trigger);
	lttng_trigger_destroy(trigger);
	lttng_action_destroy(action);
	lttng_event_rule_destroy(event_rule);
	lttng_condition_destroy(condition);
	lttng_kernel_probe_location_destroy(location);
	return;
}

static void test_uprobe_event_rule_notification(
		const char *testapp_path,
		const char *test_symbol_name)
{
	int i, ret;
	enum lttng_error_code ret_code;
	const int notification_count = 3;
	enum lttng_notification_channel_status nc_status;
	enum lttng_event_rule_status event_rule_status;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_userspace_probe_location *probe_location = NULL;
	struct lttng_userspace_probe_location_lookup_method *lookup_method =
			NULL;
	struct lttng_condition *condition = NULL;
	struct lttng_event_rule *event_rule = NULL;
	struct lttng_action *action = NULL;
	struct lttng_trigger *trigger = NULL;
	const char * const trigger_name = "uprobe_trigger";

	action = lttng_action_notify_create();
	if (!action) {
		fail("Failed to create notify action");
		goto end;
	}

	lookup_method = lttng_userspace_probe_location_lookup_method_function_elf_create();
	if (!lookup_method) {
		fail("Setup error on userspace probe lookup method creation");
		goto end;
	}

	probe_location = lttng_userspace_probe_location_function_create(
			testapp_path, test_symbol_name, lookup_method);
	if (!probe_location) {
		fail("Failed to create userspace probe location");
		goto end;
	}

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	event_rule = lttng_event_rule_kernel_uprobe_create(probe_location);
	ok(event_rule, "kprobe event rule object creation");

	event_rule_status = lttng_event_rule_kernel_uprobe_set_event_name(
			event_rule, trigger_name);
	ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
			"Setting uprobe event rule name: '%s'", trigger_name);

	condition = lttng_condition_event_rule_matches_create(event_rule);
	ok(condition, "Condition event rule object creation");

	/* Register the trigger for condition. */
	trigger = lttng_trigger_create(condition, action);
	if (!trigger) {
		fail("Failed to create trigger with userspace probe event rule condition and notify action");
		goto end;
	}

	ret_code = lttng_register_trigger_with_name(trigger, trigger_name);
	if (ret_code != LTTNG_OK) {
		fail("Failed to register trigger with userspace probe event rule condition and notify action");
		goto end;
	}

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	resume_application();

	for (i = 0; i < 3; i++) {
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		ret = validator_notification_trigger_name(notification, trigger_name);
		lttng_notification_destroy(notification);
		if (ret) {
			goto end;
		}
	}
end:
	suspend_application();

	lttng_notification_channel_destroy(notification_channel);
	lttng_unregister_trigger(trigger);
	lttng_trigger_destroy(trigger);
	lttng_action_destroy(action);
	lttng_userspace_probe_location_destroy(probe_location);
	lttng_event_rule_destroy(event_rule);
	lttng_condition_destroy(condition);
	return;
}

static void test_syscall_event_rule_notification(void)
{
	int i, ret;
	enum lttng_error_code ret_code;
	const int notification_count = 3;
	enum lttng_notification_channel_status nc_status;
	enum lttng_event_rule_status event_rule_status;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_condition *condition = NULL;
	struct lttng_event_rule *event_rule = NULL;
	struct lttng_action *action = NULL;
	struct lttng_trigger *trigger = NULL;
	const char * const trigger_name = "syscall_trigger";
	const char * const syscall_name = "openat";

	action = lttng_action_notify_create();
	if (!action) {
		fail("Failed to create notify action");
		goto end;
	}

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	event_rule = lttng_event_rule_kernel_syscall_create(LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY);
	ok(event_rule, "syscall event rule object creation");

	event_rule_status = lttng_event_rule_kernel_syscall_set_name_pattern(
			event_rule, syscall_name);
	ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
			"Setting syscall event rule pattern: '%s'", syscall_name);

	condition = lttng_condition_event_rule_matches_create(event_rule);
	ok(condition, "Condition syscall event rule object creation");

	/* Register the trigger for condition. */
	trigger = lttng_trigger_create(condition, action);
	if (!trigger) {
		fail("Failed to create trigger with syscall event rule condition and notify action");
		goto end;
	}

	ret_code = lttng_register_trigger_with_name(trigger, trigger_name);
	if (ret_code != LTTNG_OK) {
		fail("Failed to register trigger with syscall event rule condition and notify action");
		goto end;
	}

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	resume_application();

	for (i = 0; i < notification_count; i++) {
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		ret = validator_notification_trigger_name(notification, trigger_name);
		lttng_notification_destroy(notification);
		if (ret) {
			goto end;
		}
	}
end:
	suspend_application();
	lttng_notification_channel_destroy(notification_channel);
	lttng_unregister_trigger(trigger);
	lttng_trigger_destroy(trigger);
	lttng_action_destroy(action);
	lttng_condition_destroy(condition);
	return;
}

static void test_syscall_event_rule_notification_filter(void)
{
	int i, ret;
	enum lttng_error_code ret_code;
	const int notification_count = 3;
	enum lttng_notification_channel_status nc_status;
	enum lttng_event_rule_status event_rule_status;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_condition *condition = NULL;
	struct lttng_event_rule *event_rule = NULL;
	struct lttng_action *action = NULL;
	struct lttng_trigger *trigger = NULL;
	const char * const trigger_name = "syscall_trigger";
	const char * const syscall_name = "openat";
	const char * const filter_pattern = "filename == \"/proc/cpuinfo\"";

	action = lttng_action_notify_create();
	if (!action) {
		fail("Failed to create notify action");
		goto end;
	}

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	event_rule = lttng_event_rule_kernel_syscall_create(LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY);
	ok(event_rule, "syscall event rule object creation");

	event_rule_status = lttng_event_rule_kernel_syscall_set_name_pattern(
			event_rule, syscall_name);
	ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
			"Setting syscall event rule pattern: '%s'", syscall_name);

	event_rule_status = lttng_event_rule_kernel_syscall_set_filter(
			event_rule, filter_pattern);
	ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
			"Setting filter: '%s'", filter_pattern);

	condition = lttng_condition_event_rule_matches_create(event_rule);
	ok(condition, "Condition event rule object creation");

	/* Register the triggers for condition */
	trigger = lttng_trigger_create(condition, action);
	if (!trigger) {
		fail("Failed to create trigger with syscall filtering event rule condition and notify action");
		goto end;
	}

	ret_code = lttng_register_trigger_with_name(trigger, trigger_name);
	if (ret_code != LTTNG_OK) {
		fail("Failed to register trigger with syscall filtering event rule condition and notify action");
		goto end;
	}

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	resume_application();

	for (i = 0; i < notification_count; i++) {
		struct lttng_notification *notification = get_next_notification(
				notification_channel);

		ok(notification, "Received notification (%d/%d)", i + 1,
				notification_count);

		/* Error. */
		if (notification == NULL) {
			goto end;
		}

		ret = validator_notification_trigger_name(notification, trigger_name);
		lttng_notification_destroy(notification);
		if (ret) {
			goto end;
		}
	}

end:
	suspend_application();

	lttng_unregister_trigger(trigger);
	lttng_notification_channel_destroy(notification_channel);
	lttng_trigger_destroy(trigger);
	lttng_event_rule_destroy(event_rule);
	lttng_condition_destroy(condition);
	return;
}

static int generate_capture_descr(struct lttng_condition *condition)
{
	int ret, i;
	struct lttng_event_expr *expr = NULL;
	const unsigned int basic_field_count = sizeof(test_capture_base_fields) /
			sizeof(*test_capture_base_fields);
	enum lttng_condition_status cond_status;

	for (i = 0; i < basic_field_count; i++) {
		diag("Adding capture descriptor '%s'",
				test_capture_base_fields[i].field_name);

		switch (test_capture_base_fields[i].field_type) {
		case FIELD_TYPE_PAYLOAD:
			expr = lttng_event_expr_event_payload_field_create(
					test_capture_base_fields[i].field_name);
			break;
		case FIELD_TYPE_CONTEXT:
			expr = lttng_event_expr_channel_context_field_create(
					test_capture_base_fields[i].field_name);
			break;
		case FIELD_TYPE_ARRAY_FIELD:
		{
			int nb_matches;
			unsigned int index;
			char field_name[FIELD_NAME_MAX_LEN];
			struct lttng_event_expr *array_expr = NULL;

			nb_matches = sscanf(test_capture_base_fields[i].field_name,
					"%[^[][%u]", field_name, &index);
			if (nb_matches != 2) {
				fail("Unexpected array field name format: field name = '%s'",
						test_capture_base_fields[i].field_name);
				ret = 1;
				goto end;
			}

			array_expr = lttng_event_expr_event_payload_field_create(
				field_name);

			expr = lttng_event_expr_array_field_element_create(
				array_expr, index);
			break;
		}
		case FIELD_TYPE_APP_CONTEXT:
			fail("Application context tests are not implemented yet.");
			/* fallthrough. */
		default:
			ret = 1;
			goto end;
		}

		if (expr == NULL) {
			fail("Failed to create capture expression");
			ret = -1;
			goto end;
		}

		cond_status = lttng_condition_event_rule_matches_append_capture_descriptor(
				condition, expr);
		if (cond_status != LTTNG_CONDITION_STATUS_OK) {
			fail("Failed to append capture descriptor");
			ret = -1;
			lttng_event_expr_destroy(expr);
			goto end;
		}
	}

	ret = 0;

end:
	return ret;
}

static int validator_notification_trigger_capture(
		enum lttng_domain_type domain,
		struct lttng_notification *notification,
		const int iteration)
{
	int ret;
	unsigned int capture_count, i;
	enum lttng_evaluation_event_rule_matches_status
			event_rule_matches_evaluation_status;
	enum lttng_event_field_value_status event_field_value_status;
	const struct lttng_evaluation *evaluation;
	const struct lttng_event_field_value *captured_fields;
	bool at_least_one_error = false;

	evaluation = lttng_notification_get_evaluation(notification);
	if (evaluation == NULL) {
		fail("Failed to get evaluation from notification during trigger capture test");
		ret = 1;
		goto end;
	}

	event_rule_matches_evaluation_status =
			lttng_evaluation_event_rule_matches_get_captured_values(
					evaluation, &captured_fields);
	if (event_rule_matches_evaluation_status !=
			LTTNG_EVALUATION_EVENT_RULE_MATCHES_STATUS_OK) {
		diag("Failed to get event rule evaluation captured values: status = %d",
				(int) event_rule_matches_evaluation_status);
		ret = 1;
		goto end;
	}

	event_field_value_status =
		lttng_event_field_value_array_get_length(captured_fields,
				&capture_count);
	if (event_field_value_status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
		fail("Failed to get count of captured value field array");
		ret = 1;
		goto end;
	}

	for (i = 0; i < capture_count; i++) {
		const struct lttng_event_field_value *captured_field = NULL;
		validate_cb validate;
		bool expected;

		diag("Validating capture of field '%s'",
				test_capture_base_fields[i].field_name);
		event_field_value_status =
				lttng_event_field_value_array_get_element_at_index(
						captured_fields, i,
						&captured_field);

		switch(domain) {
		case LTTNG_DOMAIN_UST:
			expected = test_capture_base_fields[i].expected_ust;
			break;
		case LTTNG_DOMAIN_KERNEL:
			expected = test_capture_base_fields[i].expected_kernel;
			break;
		default:
			fail("Unexpected domain encountered: domain = %d",
					(int) domain);
			ret = 1;
			goto end;
		}

		if (domain == LTTNG_DOMAIN_UST) {
			validate = test_capture_base_fields[i].validate_ust;
		} else {
			validate = test_capture_base_fields[i].validate_kernel;
		}

		if (!expected) {
			ok(event_field_value_status == LTTNG_EVENT_FIELD_VALUE_STATUS_UNAVAILABLE,
					"No payload captured");
			continue;
		}

		if (event_field_value_status != LTTNG_EVENT_FIELD_VALUE_STATUS_OK) {
			if (event_field_value_status ==
					LTTNG_EVENT_FIELD_VALUE_STATUS_UNAVAILABLE) {
				fail("Expected a capture but it is unavailable");
			} else {
				fail("lttng_event_field_value_array_get_element_at_index returned an error: status = %d",
						(int) event_field_value_status);
			}

			ret = 1;
			goto end;
		}

		diag("Captured field of type %s",
				field_value_type_to_str(
					lttng_event_field_value_get_type(captured_field)));

		LTTNG_ASSERT(validate);
		ret = validate(captured_field, iteration);
		if (ret) {
			at_least_one_error = true;
		}
	}

	ret = at_least_one_error;

end:
	return ret;
}

static void test_tracepoint_event_rule_notification_capture(
		enum lttng_domain_type domain_type)
{
	enum lttng_notification_channel_status nc_status;

	int i, ret;
	struct lttng_condition *condition = NULL;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_trigger *trigger = NULL;
	const char *trigger_name = "my_precious";
	const char *pattern;

	if (domain_type == LTTNG_DOMAIN_UST) {
		pattern = "tp:tptest";
	} else {
		pattern = "lttng_test_filter_event";
	}

	create_tracepoint_event_rule_trigger(pattern, trigger_name, NULL, 0,
			NULL, domain_type, generate_capture_descr, &condition,
			&trigger);

	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	ok(notification_channel, "Notification channel object creation");

	nc_status = lttng_notification_channel_subscribe(
			notification_channel, condition);
	ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
			"Subscribe to tracepoint event rule condition");

	resume_application();

	/* Get 3 notifications */
	for (i = 0; i < 3; i++) {
		struct lttng_notification *notification = get_next_notification(
				notification_channel);
		ok(notification, "Received notification");

		/* Error */
		if (notification == NULL) {
			goto end;
		}

		ret = validator_notification_trigger_name(notification, trigger_name);
		if (ret) {
			lttng_notification_destroy(notification);
			goto end;
		}

		ret = validator_notification_trigger_capture(domain_type, notification, i);
		if (ret) {
			lttng_notification_destroy(notification);
			goto end;
		}

		lttng_notification_destroy(notification);
	}

end:
	suspend_application();
	lttng_notification_channel_destroy(notification_channel);
	lttng_unregister_trigger(trigger);
	lttng_trigger_destroy(trigger);
	lttng_condition_destroy(condition);
	return;
}

int main(int argc, const char *argv[])
{
	int test_scenario;
	const char *domain_type_string = NULL;
	enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE;

	if (argc < 5) {
		fail("Missing test scenario, domain type, pid, or application state file argument(s)");
		goto error;
	}

	test_scenario = atoi(argv[1]);
	domain_type_string = argv[2];
	app_pid = (pid_t) atoi(argv[3]);
	app_state_file = argv[4];

	if (!strcmp("LTTNG_DOMAIN_UST", domain_type_string)) {
		domain_type = LTTNG_DOMAIN_UST;
	}
	if (!strcmp("LTTNG_DOMAIN_KERNEL", domain_type_string)) {
		domain_type = LTTNG_DOMAIN_KERNEL;
	}
	if (domain_type == LTTNG_DOMAIN_NONE) {
		fail("Unknown domain type");
		goto error;
	}

	/*
	 * Test cases are responsible for resuming the app when needed
	 * and making sure it's suspended when returning.
	 */
	suspend_application();

	switch (test_scenario) {
	case 1:
	{
		plan_tests(41);

		/* Test cases that need gen-ust-event testapp. */
		diag("Test basic notification error paths for %s domain",
				domain_type_string);
		test_invalid_channel_subscription(domain_type);

		diag("Test tracepoint event rule notifications for domain %s",
				domain_type_string);
		test_tracepoint_event_rule_notification(domain_type);

		diag("Test tracepoint event rule notifications with filter for domain %s",
				domain_type_string);
		test_tracepoint_event_rule_notification_filter(domain_type);
		break;
	}
	case 2:
	{
		const char *session_name, *channel_name;

		/* Test cases that need a tracing session enabled. */
		plan_tests(99);

		/*
		 * Argument 7 and upward are named pipe location for consumerd
		 * control.
		 */
		named_pipe_args_start = 7;

		if (argc < 8) {
			fail("Missing parameter for tests to run %d", argc);
			goto error;
		}

		nb_args = argc;

		session_name = argv[5];
		channel_name = argv[6];

		test_subscription_twice(session_name, channel_name,
				domain_type);

		diag("Test trigger for domain %s with buffer_usage_low condition",
				domain_type_string);
		test_triggers_buffer_usage_condition(session_name, channel_name,
				LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW);

		diag("Test trigger for domain %s with buffer_usage_high condition",
				domain_type_string);
		test_triggers_buffer_usage_condition(session_name, channel_name,
				LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH);

		diag("Test buffer usage notification channel api for domain %s",
				domain_type_string);
		test_buffer_usage_notification_channel(session_name, channel_name,
				domain_type, argv);
		break;
	}
	case 3:
	{
		/*
		 * Test cases that need a test app with more than one event
		 * type.
		 */
		plan_tests(23);

		/*
		 * At the moment, the only test case of this scenario is
		 * exclusion which is only supported by UST.
		 */
		LTTNG_ASSERT(domain_type == LTTNG_DOMAIN_UST);
		diag("Test tracepoint event rule notifications with exclusion for domain %s",
				domain_type_string);
		test_tracepoint_event_rule_notification_exclusion(domain_type);

		break;
	}
	case 4:
	{
		plan_tests(11);
		/* Test cases that need the kernel tracer. */
		LTTNG_ASSERT(domain_type == LTTNG_DOMAIN_KERNEL);

		diag("Test kprobe event rule notifications for domain %s",
				domain_type_string);

		test_kprobe_event_rule_notification();

		break;
	}
	case 5:
	{
		plan_tests(23);
		/* Test cases that need the kernel tracer. */
		LTTNG_ASSERT(domain_type == LTTNG_DOMAIN_KERNEL);

		diag("Test syscall event rule notifications for domain %s",
				domain_type_string);

		test_syscall_event_rule_notification();

		diag("Test syscall filtering event rule notifications for domain %s",
				domain_type_string);

		test_syscall_event_rule_notification_filter();

		break;
	}
	case 6:
	{
		const char *testapp_path, *test_symbol_name;

		plan_tests(11);

		if (argc < 7) {
			fail("Missing parameter for tests to run %d", argc);
			goto error;
		}

		testapp_path = argv[5];
		test_symbol_name = argv[6];
		/* Test cases that need the kernel tracer. */
		LTTNG_ASSERT(domain_type == LTTNG_DOMAIN_KERNEL);

		diag("Test userspace-probe event rule notifications for domain %s",
				domain_type_string);

		test_uprobe_event_rule_notification(
				testapp_path, test_symbol_name);

		break;
	}
	case 7:
	{
		switch(domain_type) {
		case LTTNG_DOMAIN_UST:
			plan_tests(221);
			break;
		case LTTNG_DOMAIN_KERNEL:
			plan_tests(215);
			break;
		default:
			abort();
		}

		diag("Test tracepoint event rule notification captures for domain %s",
				domain_type_string);
		test_tracepoint_event_rule_notification_capture(domain_type);

		break;
	}

	default:
		abort();
	}

error:
	return exit_status();
}