From: Julien Desfossez Date: Wed, 10 Jan 2018 19:49:20 +0000 (-0500) Subject: Test for lttng-logger X-Git-Tag: v2.11.0-rc1~226 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=ab95d85d8784a545ff66c2025110829e9b5cb1b8;p=lttng-tools.git Test for lttng-logger Basic test to write in /proc/lttng-logger and /dev/lttng-logger and ensure we have the right amount of events in the trace resulting trace. We also test the 1024 characters limit for the payload. Signed-off-by: Julien Desfossez Signed-off-by: Jérémie Galarneau --- diff --git a/tests/regression/kernel/Makefile.am b/tests/regression/kernel/Makefile.am index c4ee44390..a0abc7baf 100644 --- a/tests/regression/kernel/Makefile.am +++ b/tests/regression/kernel/Makefile.am @@ -1,6 +1,6 @@ EXTRA_DIST = test_event_basic test_all_events test_syscall \ test_clock_override test_rotation_destroy_flush \ - test_select_poll_epoll + test_select_poll_epoll test_lttng_logger noinst_PROGRAMS = select_poll_epoll select_poll_epoll_SOURCES = select_poll_epoll.c diff --git a/tests/regression/kernel/test_lttng_logger b/tests/regression/kernel/test_lttng_logger new file mode 100755 index 000000000..b0a53fec0 --- /dev/null +++ b/tests/regression/kernel/test_lttng_logger @@ -0,0 +1,138 @@ +#!/bin/bash +# +# Copyright (C) - 2017 Julien Desfossez +# +# This program is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License, version 2 only, as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +# You should have received a copy of the GNU General Public License along with +# this program; if not, write to the Free Software Foundation, Inc., 51 +# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +TEST_DESC="Kernel tracer - lttng-logger" + +CURDIR=$(dirname $0)/ +TESTDIR=$CURDIR/../.. +NUM_TESTS=30 +PAYLOAD="test_logger" +SESSION_NAME="kernel_event_basic" + +source $TESTDIR/utils/utils.sh + +function test_proc_logger() +{ + diag "Test /proc/lttng-logger" + + TRACE_PATH=$(mktemp -d) + + 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 $TRACE_PATH +} + +function test_dev_logger() +{ + diag "Test /dev/lttng-logger" + + TRACE_PATH=$(mktemp -d) + + 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 $TRACE_PATH +} + +function test_payload_limit() +{ + diag "Test lttng-logger payload limit" + + TRACE_PATH=$(mktemp -d) + + 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." $NUM_TESTS || +{ + start_lttng_sessiond + + test_proc_logger + test_dev_logger + test_payload_limit + + stop_lttng_sessiond +} diff --git a/tests/root_regression b/tests/root_regression index 7639c181c..f17ac977f 100644 --- a/tests/root_regression +++ b/tests/root_regression @@ -4,6 +4,7 @@ regression/kernel/test_syscall regression/kernel/test_clock_override regression/kernel/test_rotation_destroy_flush regression/kernel/test_select_poll_epoll +regression/kernel/test_lttng_logger regression/tools/live/test_kernel regression/tools/live/test_lttng_kernel regression/tools/streaming/test_high_throughput_limits diff --git a/tests/utils/utils.sh b/tests/utils/utils.sh index 7181e3b88..3a619201f 100644 --- a/tests/utils/utils.sh +++ b/tests/utils/utils.sh @@ -1519,7 +1519,7 @@ function validate_trace_only_exp() local total=$($BABELTRACE_BIN $trace_path | wc -l) if [ "$count" -ne 0 ] && [ "$total" -eq "$count" ]; then - pass "Trace match with $total for expression '${event_exp}" + pass "Trace match with $total for expression '${event_exp}'" else fail "Trace match" diag "$total syscall event(s) found, only syscalls matching expression '${event_exp}' ($count occurrences) are expected"