| 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=2060 |
| 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_ok $SESSION_NAME |
| 45 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 46 | lttng_snapshot_record $SESSION_NAME |
| 47 | stop_lttng_tracing_ok $SESSION_NAME |
| 48 | destroy_lttng_session_ok $SESSION_NAME |
| 49 | |
| 50 | # Validate test |
| 51 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 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_ok $SESSION_NAME |
| 67 | stop_lttng_tracing_ok $SESSION_NAME |
| 68 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 69 | lttng_snapshot_record $SESSION_NAME |
| 70 | destroy_lttng_session_ok $SESSION_NAME |
| 71 | |
| 72 | # Validate test |
| 73 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 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 | local EVENT1=sched_switch |
| 85 | local EVENT2=sched_process_exit |
| 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_ok $SESSION_NAME |
| 92 | lttng_snapshot_add_output_ok $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/ |
| 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/ |
| 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_ok $SESSION_NAME |
| 118 | destroy_lttng_session_ok $SESSION_NAME |
| 119 | } |
| 120 | |
| 121 | function true_loop_cpu0() |
| 122 | { |
| 123 | # Generate many system call events (fill buffers) on CPU 0 |
| 124 | for a in $(seq 1 $1); do |
| 125 | taskset 0x00000001 /bin/true; |
| 126 | done |
| 127 | } |
| 128 | |
| 129 | function test_kernel_local_snapshot_discard () |
| 130 | { |
| 131 | diag "Test local kernel snapshots with small discard buffers" |
| 132 | create_lttng_session_no_output $SESSION_NAME |
| 133 | enable_lttng_mmap_discard_small_kernel_channel $SESSION_NAME \ |
| 134 | $CHANNEL_NAME |
| 135 | lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME |
| 136 | start_lttng_tracing_ok $SESSION_NAME |
| 137 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 138 | |
| 139 | true_loop_cpu0 10000 |
| 140 | |
| 141 | # Take first snapshot, remember first line. |
| 142 | lttng_snapshot_record $SESSION_NAME |
| 143 | FIRST_LINE="$(trace_first_line $TRACE_PATH/)" |
| 144 | diag "First line (1st snapshot): $FIRST_LINE" |
| 145 | |
| 146 | rm -rf $TRACE_PATH |
| 147 | |
| 148 | true_loop_cpu0 10000 |
| 149 | |
| 150 | # Take 2nd snapshot, compare first line. In discard mode, they |
| 151 | # should still be the same. |
| 152 | lttng_snapshot_record $SESSION_NAME |
| 153 | FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)" |
| 154 | diag "First line (2nd snapshot): $FIRST_LINE" |
| 155 | rm -rf $TRACE_PATH |
| 156 | |
| 157 | if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then |
| 158 | fail "First snapshot event do not match." |
| 159 | else |
| 160 | pass "First snapshot event match." |
| 161 | fi |
| 162 | |
| 163 | stop_lttng_tracing_ok $SESSION_NAME |
| 164 | destroy_lttng_session_ok $SESSION_NAME |
| 165 | } |
| 166 | |
| 167 | function test_kernel_local_snapshot_overwrite_small_buffers () |
| 168 | { |
| 169 | diag "Test local kernel snapshot with small overwrite buffers" |
| 170 | create_lttng_session_no_output $SESSION_NAME |
| 171 | enable_lttng_mmap_overwrite_small_kernel_channel $SESSION_NAME \ |
| 172 | $CHANNEL_NAME |
| 173 | lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME |
| 174 | start_lttng_tracing_ok $SESSION_NAME |
| 175 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 176 | |
| 177 | true_loop_cpu0 10000 |
| 178 | |
| 179 | # Take first snapshot, remember first line. |
| 180 | lttng_snapshot_record $SESSION_NAME |
| 181 | FIRST_LINE="$(trace_first_line $TRACE_PATH/)" |
| 182 | diag "First line (1st snapshot): $FIRST_LINE" |
| 183 | |
| 184 | rm -rf $TRACE_PATH |
| 185 | |
| 186 | true_loop_cpu0 10000 |
| 187 | |
| 188 | # Take 2nd snapshot, compare first line. In overwrite mode, they |
| 189 | # WILL be different. |
| 190 | lttng_snapshot_record $SESSION_NAME |
| 191 | FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)" |
| 192 | diag "First line (2nd snapshot): $FIRST_LINE_2" |
| 193 | rm -rf $TRACE_PATH |
| 194 | |
| 195 | if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then |
| 196 | pass "First snapshot event do not match." |
| 197 | else |
| 198 | fail "First snapshot event match." |
| 199 | fi |
| 200 | |
| 201 | stop_lttng_tracing_ok $SESSION_NAME |
| 202 | destroy_lttng_session_ok $SESSION_NAME |
| 203 | } |
| 204 | |
| 205 | function test_kernel_1000_local_snapshots () |
| 206 | { |
| 207 | NB_SNAP=1000 |
| 208 | |
| 209 | diag "Test local kernel snapshots" |
| 210 | create_lttng_session_no_output $SESSION_NAME |
| 211 | enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME |
| 212 | lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME |
| 213 | start_lttng_tracing_ok $SESSION_NAME |
| 214 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 215 | for i in $(seq 1 $NB_SNAP); do |
| 216 | diag "Snapshot $i/$NB_SNAP" |
| 217 | rm -rf $TRACE_PATH/snapshot/* 2>/dev/null |
| 218 | lttng_snapshot_record $SESSION_NAME |
| 219 | # Validate test |
| 220 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 221 | if [ $? -eq 0 ]; then |
| 222 | # Only delete if successful |
| 223 | rm -rf $TRACE_PATH |
| 224 | else |
| 225 | break |
| 226 | fi |
| 227 | done |
| 228 | stop_lttng_tracing_ok $SESSION_NAME |
| 229 | destroy_lttng_session_ok $SESSION_NAME |
| 230 | } |
| 231 | |
| 232 | plan_tests $NUM_TESTS |
| 233 | |
| 234 | print_test_banner "$TEST_DESC" |
| 235 | |
| 236 | if [ "$(id -u)" == "0" ]; then |
| 237 | isroot=1 |
| 238 | else |
| 239 | isroot=0 |
| 240 | fi |
| 241 | |
| 242 | skip $isroot "Root access is needed. Skipping all kernel snapshot tests." $NUM_TESTS || |
| 243 | { |
| 244 | start_lttng_sessiond |
| 245 | |
| 246 | #tests=( test_kernel_1000_local_snapshots ) |
| 247 | tests=( test_kernel_local_snapshot |
| 248 | test_kernel_local_snapshot_after_stop |
| 249 | test_kernel_local_snapshot_append_to_metadata |
| 250 | test_kernel_local_snapshot_discard |
| 251 | test_kernel_local_snapshot_overwrite_small_buffers |
| 252 | test_kernel_1000_local_snapshots |
| 253 | ) |
| 254 | |
| 255 | for fct_test in ${tests[@]}; |
| 256 | do |
| 257 | SESSION_NAME=$(randstring 16 0) |
| 258 | ${fct_test} |
| 259 | |
| 260 | done |
| 261 | |
| 262 | stop_lttng_sessiond |
| 263 | } |