tests/regression/tools/notification/test_notification_kernel_buffer_usage

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2017 Jonathan Rajotte-Julien <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 ${CURDIR}/.libs/libpause_consumer.so)
  16
  17
  18 TESTAPP_PATH="$TESTDIR/utils/testapp"
  19 TESTAPP_NAME="gen-ust-events"
  20 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
  21 TESTAPP_STATE_PATH=$(mktemp -u "$TMPDIR/application_state.XXXXXXXXXX")
  22
  23 SYSCALL_TESTAPP_NAME="gen-syscall-events"
  24 SYSCALL_TESTAPP_BIN="$TESTAPP_PATH/$SYSCALL_TESTAPP_NAME/$SYSCALL_TESTAPP_NAME"
  25
  26 USERSPACE_PROBE_ELF_TESTAPP_NAME="userspace-probe-elf-binary"
  27 USERSPACE_PROBE_ELF_TESTAPP_BIN="$TESTAPP_PATH/$USERSPACE_PROBE_ELF_TESTAPP_NAME/.libs/$USERSPACE_PROBE_ELF_TESTAPP_NAME"
  28
  29 SESSION_NAME="my_session"
  30 CHANNEL_NAME="my_channel"
  31
  32 TRACE_PATH=$(mktemp -d)
  33 PAGE_SIZE=$(getconf PAGE_SIZE)
  34
  35 DIR=$(readlink -f $TESTDIR)
  36 NUM_TESTS=104
  37
  38 source $TESTDIR/utils/utils.sh
  39
  40 function kernel_event_generator_toggle_state
  41 {
  42         kernel_event_generator_suspended=$((kernel_event_generator_suspended==0))
  43 }
  44
  45 function generate_filter_events
  46 {
  47         /bin/echo -n "10" > /proc/lttng-test-filter-event 2> /dev/null
  48 }
  49
  50 function kernel_event_generator
  51 {
  52         command_to_run=$1
  53         state_file=$2
  54         kernel_event_generator_suspended=0
  55         trap kernel_event_generator_toggle_state SIGUSR1
  56
  57         while (true); do
  58                 if [[ $kernel_event_generator_suspended -eq "1" ]]; then
  59                         touch $state_file
  60                         sleep 0.5
  61                 else
  62                         if [[ -f $state_file ]]; then
  63                                 rm $state_file 2> /dev/null
  64                         fi
  65                         $command_to_run
  66                 fi
  67         done
  68 }
  69
  70 function test_buffer_usage_notification
  71 {
  72         local consumerd_pipe=$1
  73         local event_name="lttng_test_filter_event"
  74
  75         create_lttng_session_notap $SESSION_NAME $TRACE_PATH
  76
  77         lttng_enable_kernel_channel_notap $SESSION_NAME $CHANNEL_NAME \
  78                 --subbuf-size=$PAGE_SIZE
  79         enable_kernel_lttng_event_notap $SESSION_NAME $event_name $CHANNEL_NAME
  80
  81         kernel_event_generator generate_filter_events $TESTAPP_STATE_PATH &
  82         APP_PID=$!
  83
  84         $CURDIR/notification 2 LTTNG_DOMAIN_KERNEL $APP_PID $TESTAPP_STATE_PATH \
  85                 $SESSION_NAME $CHANNEL_NAME ${consumerd_pipe[@]}
  86
  87         destroy_lttng_session_notap $SESSION_NAME
  88
  89         kill -9 $APP_PID
  90         wait $APP_PID 2> /dev/null
  91 }
  92
  93 if [ "$(id -u)" == "0" ]; then
  94         consumerd_pipe=()
  95
  96         validate_lttng_modules_present
  97
  98         # This is needed since the testpoint create a pipe with the consumer
  99         # type suffixed.
 100         for f in "$TESTPOINT_BASE_PATH"*; do
 101                 consumerd_pipe+=("$f")
 102         done
 103
 104         modprobe lttng-test
 105
 106         LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 \
 107                 CONSUMER_PAUSE_PIPE_PATH=${TESTPOINT_PIPE_PATH} \
 108                 LD_PRELOAD=${TESTPOINT}"
 109
 110         start_lttng_sessiond_notap
 111
 112         test_buffer_usage_notification $consumerd_pipe
 113
 114         stop_lttng_sessiond_notap
 115         rmmod lttng-test
 116
 117         rm -rf ${consumerd_pipe[@]} 2> /dev/null
 118 else
 119         # Kernel tests are skipped.
 120         plan_tests $NUM_TESTS
 121         skip 0 "Root access is needed. Skipping all kernel notification tests." $NUM_TESTS
 122 fi
 123
 124 # Just in case cleanup
 125 rm -rf $TRACE_PATH
 126 rm -rf $TMPDIR