[lttng-tools.git] / tests / regression / kernel / test_lttng_logger

#!/bin/bash
#
# Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com>
#
# SPDX-License-Identifier: GPL-2.0-only
#

TEST_DESC="Kernel tracer - lttng-logger"

CURDIR=$(dirname $0)/
TESTDIR=$CURDIR/../..
NUM_TESTS=30
PAYLOAD="test_logger"
SESSION_NAME="kernel_event_basic"

source $TESTDIR/utils/utils.sh

function test_proc_logger()
{
	diag "Test /proc/lttng-logger"

	local TRACE_PATH=$(mktemp --tmpdir -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH

	lttng_enable_kernel_event $SESSION_NAME "lttng_logger"

	start_lttng_tracing_ok

	test -e /proc/lttng-logger
	if test $? = 0; then
		pass "/proc/lttng-logger exists"
		echo -n "$PAYLOAD proc" > /proc/lttng-logger
		ok $? "Write in /proc/lttng-logger"
	else
		fail "No /proc/lttng-logger"
	fi

	stop_lttng_tracing_ok

	validate_trace_count "lttng_logger" $TRACE_PATH 1
	validate_trace_only_exp "$PAYLOAD" $TRACE_PATH

	destroy_lttng_session_ok $SESSION_NAME

	rm -rf $TRACE_PATH
}

function test_dev_logger()
{
	diag "Test /dev/lttng-logger"

	local TRACE_PATH=$(mktemp --tmpdir -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH

	lttng_enable_kernel_event $SESSION_NAME "lttng_logger"

	start_lttng_tracing_ok

	test -c /dev/lttng-logger
	if test $? = 0; then
		pass "/dev/lttng-logger is a character device"
		echo -n "$PAYLOAD dev" > /dev/lttng-logger
		ok $? "Write in /dev/lttng-logger"
	else
		fail "No /dev/lttng-logger"
	fi

	stop_lttng_tracing_ok

	validate_trace_count "lttng_logger" $TRACE_PATH 1
	validate_trace_only_exp "$PAYLOAD" $TRACE_PATH

	destroy_lttng_session_ok $SESSION_NAME

	rm -rf $TRACE_PATH
}

function test_payload_limit()
{
	diag "Test lttng-logger payload limit"

	local TRACE_PATH=$(mktemp --tmpdir -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")

	create_lttng_session_ok $SESSION_NAME $TRACE_PATH

	lttng_enable_kernel_event $SESSION_NAME "lttng_logger"

	start_lttng_tracing_ok

	# Write 100 times "test_logger", which generates 1200 characters, we expect
	# the tracer to write 2 events from that string because it limits the
	# input to 1024 strings.
	printf "%.s $PAYLOAD" {1..100} > /proc/lttng-logger
	printf "%.s $PAYLOAD" {1..100} > /dev/lttng-logger

	stop_lttng_tracing_ok

	validate_trace_count "lttng_logger" $TRACE_PATH 4
	validate_trace_only_exp "$PAYLOAD" $TRACE_PATH

	destroy_lttng_session_ok $SESSION_NAME

	rm -rf $TRACE_PATH
}

# MUST set TESTDIR before calling those functions
plan_tests $NUM_TESTS

print_test_banner "$TEST_DESC"

if [ "$(id -u)" == "0" ]; then
	isroot=1
else
	isroot=0
fi

skip $isroot "Root access is needed. Skipping all tests." $NUM_TESTS ||
{
	validate_lttng_modules_present
	start_lttng_sessiond

	test_proc_logger
	test_dev_logger
	test_payload_limit

	stop_lttng_sessiond
}
Commit	Line	Data
ab95d85d JD	1	#!/bin/bash
ab95d85d JD	2	#
9d16b343	3	# Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com>
ab95d85d	4	#
9d16b343	5	# SPDX-License-Identifier: GPL-2.0-only
ab95d85d	6	#
ab95d85d JD	7
	8	TEST_DESC="Kernel tracer - lttng-logger"
	9
	10	CURDIR=$(dirname $0)/
	11	TESTDIR=$CURDIR/../..
	12	NUM_TESTS=30
	13	PAYLOAD="test_logger"
	14	SESSION_NAME="kernel_event_basic"
	15
	16	source $TESTDIR/utils/utils.sh
	17
	18	function test_proc_logger()
	19	{
	20	diag "Test /proc/lttng-logger"
	21
7539dcec	22	local TRACE_PATH=$(mktemp --tmpdir -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")
ab95d85d JD	23
	24	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	25
	26	lttng_enable_kernel_event $SESSION_NAME "lttng_logger"
	27
	28	start_lttng_tracing_ok
	29
	30	test -e /proc/lttng-logger
	31	if test $? = 0; then
	32	pass "/proc/lttng-logger exists"
	33	echo -n "$PAYLOAD proc" > /proc/lttng-logger
	34	ok $? "Write in /proc/lttng-logger"
	35	else
	36	fail "No /proc/lttng-logger"
	37	fi
	38
	39	stop_lttng_tracing_ok
	40
	41	validate_trace_count "lttng_logger" $TRACE_PATH 1
	42	validate_trace_only_exp "$PAYLOAD" $TRACE_PATH
	43
	44	destroy_lttng_session_ok $SESSION_NAME
	45
	46	rm -rf $TRACE_PATH
	47	}
	48
	49	function test_dev_logger()
	50	{
	51	diag "Test /dev/lttng-logger"
	52
7539dcec	53	local TRACE_PATH=$(mktemp --tmpdir -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")
ab95d85d JD	54
	55	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	56
	57	lttng_enable_kernel_event $SESSION_NAME "lttng_logger"
	58
	59	start_lttng_tracing_ok
	60
	61	test -c /dev/lttng-logger
	62	if test $? = 0; then
	63	pass "/dev/lttng-logger is a character device"
	64	echo -n "$PAYLOAD dev" > /dev/lttng-logger
	65	ok $? "Write in /dev/lttng-logger"
	66	else
	67	fail "No /dev/lttng-logger"
	68	fi
	69
	70	stop_lttng_tracing_ok
	71
	72	validate_trace_count "lttng_logger" $TRACE_PATH 1
	73	validate_trace_only_exp "$PAYLOAD" $TRACE_PATH
	74
	75	destroy_lttng_session_ok $SESSION_NAME
	76
	77	rm -rf $TRACE_PATH
	78	}
	79
	80	function test_payload_limit()
	81	{
	82	diag "Test lttng-logger payload limit"
	83
7539dcec	84	local TRACE_PATH=$(mktemp --tmpdir -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX")
ab95d85d JD	85
	86	create_lttng_session_ok $SESSION_NAME $TRACE_PATH
	87
	88	lttng_enable_kernel_event $SESSION_NAME "lttng_logger"
	89
	90	start_lttng_tracing_ok
	91
	92	# Write 100 times "test_logger", which generates 1200 characters, we expect
	93	# the tracer to write 2 events from that string because it limits the
	94	# input to 1024 strings.
	95	printf "%.s $PAYLOAD" {1..100} > /proc/lttng-logger
	96	printf "%.s $PAYLOAD" {1..100} > /dev/lttng-logger
	97
	98	stop_lttng_tracing_ok
	99
	100	validate_trace_count "lttng_logger" $TRACE_PATH 4
	101	validate_trace_only_exp "$PAYLOAD" $TRACE_PATH
	102
	103	destroy_lttng_session_ok $SESSION_NAME
	104
	105	rm -rf $TRACE_PATH
	106	}
	107
	108	# MUST set TESTDIR before calling those functions
	109	plan_tests $NUM_TESTS
	110
	111	print_test_banner "$TEST_DESC"
	112
	113	if [ "$(id -u)" == "0" ]; then
	114	isroot=1
	115	else
	116	isroot=0
	117	fi
	118
	119	skip $isroot "Root access is needed. Skipping all tests." $NUM_TESTS \|\|
	120	{
ebdd11df	121	validate_lttng_modules_present
ab95d85d JD	122	start_lttng_sessiond
	123
	124	test_proc_logger
	125	test_dev_logger
	126	test_payload_limit
	127
	128	stop_lttng_sessiond
	129	}