| 1 | #!/bin/bash |
| 2 | # |
| 3 | # Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com> |
| 4 | # |
| 5 | # SPDX-License-Identifier: GPL-2.0-only |
| 6 | # |
| 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 $TESTDIR/utils/utils.sh |
| 17 | |
| 18 | function test_proc_logger() |
| 19 | { |
| 20 | diag "Test /proc/lttng-logger" |
| 21 | |
| 22 | local TRACE_PATH=$(mktemp -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
| 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 $TRACE_PATH |
| 47 | } |
| 48 | |
| 49 | function test_dev_logger() |
| 50 | { |
| 51 | diag "Test /dev/lttng-logger" |
| 52 | |
| 53 | local TRACE_PATH=$(mktemp -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
| 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 $TRACE_PATH |
| 78 | } |
| 79 | |
| 80 | function test_payload_limit() |
| 81 | { |
| 82 | diag "Test lttng-logger payload limit" |
| 83 | |
| 84 | local TRACE_PATH=$(mktemp -d -t "tmp.${FUNCNAME[0]}_trace_path.XXXXXX") |
| 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 | check_skip_kernel_test "$NUM_TESTS" "Skipping all tests." || |
| 114 | { |
| 115 | validate_lttng_modules_present |
| 116 | start_lttng_sessiond |
| 117 | |
| 118 | test_proc_logger |
| 119 | test_dev_logger |
| 120 | test_payload_limit |
| 121 | |
| 122 | stop_lttng_sessiond |
| 123 | } |