1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
#!/bin/bash
#
# SPDX-FileCopyrightText: 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=32
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 -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 -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 -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"
check_skip_kernel_test "$NUM_TESTS" "Skipping all tests." ||
{
lttng_modules_loaded_fail
validate_lttng_modules_present
start_lttng_sessiond
test_proc_logger
test_dev_logger
test_payload_limit
stop_lttng_sessiond
lttng_modules_loaded_fail
}
|
