tests/regression/tools/notification/test_notification_kernel_buffer_usage

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   4 #
   5 # SPDX-License-Identifier: LGPL-2.1-only
   6
   7 CURDIR=$(dirname "$0")/
   8 TESTDIR=$CURDIR/../../../
   9
  10 TMPDIR=$(mktemp -d)
  11
  12 #This is needed since the testpoint create a pipe with the consumerd type suffixed
  13 TESTPOINT_BASE_PATH=$(readlink -f "$TMPDIR/lttng.t_p_n")
  14 TESTPOINT_PIPE_PATH=$(mktemp -u "${TESTPOINT_BASE_PATH}.XXXXXX")
  15 TESTPOINT=$(readlink -f "${CURDIR}/.libs/libpause_consumer.so")
  16 TESTAPP_STATE_PATH=$(mktemp -u "$TMPDIR/application_state.XXXXXXXXXX")
  17
  18
  19 SESSION_NAME="my_session"
  20 CHANNEL_NAME="my_channel"
  21
  22 NUM_TESTS=104
  23
  24 # shellcheck source=../../../utils/utils.sh
  25 source "$TESTDIR/utils/utils.sh"
  26
  27 function kernel_event_generator_toggle_state
  28 {
  29         kernel_event_generator_suspended=$((kernel_event_generator_suspended==0))
  30 }
  31
  32 function generate_filter_events
  33 {
  34         /bin/echo -n "10" > /proc/lttng-test-filter-event 2> /dev/null
  35 }
  36
  37 function kernel_event_generator
  38 {
  39         command_to_run=$1
  40         state_file=$2
  41         kernel_event_generator_suspended=0
  42         trap kernel_event_generator_toggle_state SIGUSR1
  43
  44         while (true); do
  45                 if [[ $kernel_event_generator_suspended -eq "1" ]]; then
  46                         touch $state_file
  47                         sleep 0.5
  48                 else
  49                         if [[ -f $state_file ]]; then
  50                                 rm $state_file 2> /dev/null
  51                         fi
  52                         $command_to_run
  53                 fi
  54         done
  55 }
  56
  57 function test_buffer_usage_notification
  58 {
  59         local event_name="lttng_test_filter_event"
  60         local trace_path
  61         local page_size
  62         local consumerd_pipe=()
  63
  64         trace_path=$(mktemp -d)
  65         page_size=$(getconf PAGE_SIZE)
  66
  67         create_lttng_session_notap $SESSION_NAME "$trace_path"
  68
  69         lttng_enable_kernel_channel_notap $SESSION_NAME $CHANNEL_NAME \
  70                 --subbuf-size="$page_size"
  71         enable_kernel_lttng_event_notap $SESSION_NAME $event_name $CHANNEL_NAME
  72
  73         kernel_event_generator generate_filter_events "$TESTAPP_STATE_PATH" &
  74         APP_PID=$!
  75
  76         # This is needed since the testpoint create a pipe with the consumer
  77         # type suffixed.
  78         for f in "$TESTPOINT_BASE_PATH"*; do
  79                 consumerd_pipe+=("$f")
  80         done
  81
  82         "$CURDIR/notification" 2 LTTNG_DOMAIN_KERNEL $SESSION_NAME $CHANNEL_NAME \
  83                 $APP_PID $TESTAPP_STATE_PATH ${consumerd_pipe[@]}
  84
  85         destroy_lttng_session_notap $SESSION_NAME
  86
  87         kill -9 $APP_PID
  88         wait $APP_PID 2> /dev/null
  89 }
  90
  91 if [ "$(id -u)" == "0" ]; then
  92
  93         validate_lttng_modules_present
  94
  95
  96         modprobe lttng-test
  97
  98         # Used on sessiond launch.
  99         LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 \
 100                 CONSUMER_PAUSE_PIPE_PATH=${TESTPOINT_PIPE_PATH} \
 101                 LD_PRELOAD=${TESTPOINT}"
 102         start_lttng_sessiond_notap
 103
 104         test_buffer_usage_notification
 105
 106         stop_lttng_sessiond_notap
 107         rmmod lttng-test
 108
 109         rm -rf "${consumerd_pipe[@]}" 2> /dev/null
 110 else
 111         # Kernel tests are skipped.
 112         plan_tests $NUM_TESTS
 113         skip 0 "Root access is needed. Skipping all kernel notification tests." $NUM_TESTS
 114 fi
 115
 116 rm -rf "$TMPDIR"