tests/regression/tools/snapshots/test_kernel

   1 #!/bin/bash
   2 #
   3 # Copyright (C) - 2013 Julien Desfossez <jdesfossez@efficios.com>
   4 #
   5 # This library is free software; you can redistribute it and/or modify it under
   6 # the terms of the GNU Lesser General Public License as published by the Free
   7 # Software Foundation; version 2.1 of the License.
   8 #
   9 # This library is distributed in the hope that it will be useful, but WITHOUT
  10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11 # FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  12 # details.
  13 #
  14 # You should have received a copy of the GNU Lesser General Public License
  15 # along with this library; if not, write to the Free Software Foundation, Inc.,
  16 # 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  17 TEST_DESC="Snapshots - Kernel tracing"
  18
  19 CURDIR=$(dirname $0)/
  20 TESTDIR=$CURDIR/../../..
  21 EVENT_NAME="sched_switch"
  22 PID_RELAYD=0
  23 SESSION_NAME=""
  24 CHANNEL_NAME="snapchan"
  25
  26 TRACE_PATH=$(mktemp -d)
  27
  28 NUM_TESTS=2040
  29
  30 source $TESTDIR/utils/utils.sh
  31
  32 # LTTng kernel modules check
  33 out=`ls /lib/modules/$(uname -r)/extra | grep lttng`
  34 if [ -z "$out" ]; then
  35         BAIL_OUT "LTTng modules not detected."
  36 fi
  37
  38 function test_kernel_local_snapshot ()
  39 {
  40         diag "Test local kernel snapshots"
  41         create_lttng_session_no_output $SESSION_NAME
  42         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
  43         lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
  44         start_lttng_tracing $SESSION_NAME
  45         lttng_snapshot_add_output $SESSION_NAME $TRACE_PATH
  46         lttng_snapshot_record $SESSION_NAME
  47         stop_lttng_tracing $SESSION_NAME
  48         destroy_lttng_session $SESSION_NAME
  49
  50         # Validate test
  51         validate_trace $EVENT_NAME $TRACE_PATH/snapshot/
  52         if [ $? -eq 0 ]; then
  53                 # Only delete if successful
  54                 rm -rf $TRACE_PATH
  55         else
  56                 break
  57         fi
  58 }
  59
  60 function test_kernel_local_snapshot_after_stop ()
  61 {
  62         diag "Test local kernel snapshots after stop"
  63         create_lttng_session_no_output $SESSION_NAME
  64         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
  65         lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
  66         start_lttng_tracing $SESSION_NAME
  67         stop_lttng_tracing $SESSION_NAME
  68         lttng_snapshot_add_output $SESSION_NAME $TRACE_PATH
  69         lttng_snapshot_record $SESSION_NAME
  70         destroy_lttng_session $SESSION_NAME
  71
  72         # Validate test
  73         validate_trace $EVENT_NAME $TRACE_PATH/snapshot/
  74         if [ $? -eq 0 ]; then
  75                 # Only delete if successful
  76                 rm -rf $TRACE_PATH
  77         else
  78                 break
  79         fi
  80 }
  81
  82 function test_kernel_local_snapshot_append_to_metadata ()
  83 {
  84         EVENT1=sched_switch
  85         EVENT2=sched_process_exec
  86
  87         diag "Test local kernel snapshots with one event $EVENT1"
  88         create_lttng_session_no_output $SESSION_NAME
  89         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
  90         lttng_enable_kernel_event $SESSION_NAME $EVENT1 $CHANNEL_NAME
  91         start_lttng_tracing $SESSION_NAME
  92         lttng_snapshot_add_output $SESSION_NAME $TRACE_PATH
  93
  94         # first snapshot with only 1 event
  95         lttng_snapshot_record $SESSION_NAME
  96         validate_trace $EVENT_NAME $TRACE_PATH/snapshot/
  97         if [ $? -eq 0 ]; then
  98                 # Only delete if successful
  99                 rm -rf $TRACE_PATH
 100         else
 101                 break
 102         fi
 103
 104         diag "Adding event $EVENT2"
 105         # second snapshot with 2 events
 106         lttng_enable_kernel_event $SESSION_NAME $EVENT2 $CHANNEL_NAME
 107         rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
 108         lttng_snapshot_record $SESSION_NAME
 109         validate_trace "${EVENT1},${EVENT2}" $TRACE_PATH/snapshot/
 110         if [ $? -eq 0 ]; then
 111                 # Only delete if successful
 112                 rm -rf $TRACE_PATH
 113         else
 114                 break
 115         fi
 116
 117         stop_lttng_tracing $SESSION_NAME
 118         destroy_lttng_session $SESSION_NAME
 119 }
 120
 121 function test_kernel_1000_local_snapshots ()
 122 {
 123         NB_SNAP=1000
 124
 125         diag "Test local kernel snapshots"
 126         create_lttng_session_no_output $SESSION_NAME
 127         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
 128         lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
 129         start_lttng_tracing $SESSION_NAME
 130         lttng_snapshot_add_output $SESSION_NAME $TRACE_PATH
 131         for i in $(seq 1 $NB_SNAP); do
 132                 diag "Snapshot $i/$NB_SNAP"
 133                 rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
 134                 lttng_snapshot_record $SESSION_NAME
 135                 # Validate test
 136                 validate_trace $EVENT_NAME $TRACE_PATH/snapshot/
 137                 if [ $? -eq 0 ]; then
 138                         # Only delete if successful
 139                         rm -rf $TRACE_PATH
 140                 else
 141                         break
 142                 fi
 143         done
 144         stop_lttng_tracing $SESSION_NAME
 145         destroy_lttng_session $SESSION_NAME
 146 }
 147
 148 plan_tests $NUM_TESTS
 149
 150 print_test_banner "$TEST_DESC"
 151
 152 if [ "$(id -u)" == "0" ]; then
 153         isroot=1
 154 else
 155         isroot=0
 156 fi
 157
 158 skip $isroot "Root access is needed. Skipping all kernel snapshot tests." $NUM_TESTS ||
 159 {
 160         start_lttng_sessiond
 161
 162         #tests=( test_kernel_1000_local_snapshots )
 163         tests=( test_kernel_local_snapshot test_kernel_local_snapshot_after_stop test_kernel_local_snapshot_append_to_metadata test_kernel_1000_local_snapshots )
 164
 165         for fct_test in ${tests[@]};
 166         do
 167                 SESSION_NAME=$(randstring 16 0)
 168                 ${fct_test}
 169
 170         done
 171
 172         stop_lttng_sessiond
 173 }