| 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 | SESSION_NAME="" |
| 23 | CHANNEL_NAME="snapchan" |
| 24 | |
| 25 | TRACE_PATH=$(mktemp -d) |
| 26 | |
| 27 | NUM_TESTS=2060 |
| 28 | |
| 29 | source $TESTDIR/utils/utils.sh |
| 30 | |
| 31 | function test_kernel_local_snapshot () |
| 32 | { |
| 33 | diag "Test local kernel snapshots" |
| 34 | create_lttng_session_no_output $SESSION_NAME |
| 35 | enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME |
| 36 | lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME |
| 37 | start_lttng_tracing_ok $SESSION_NAME |
| 38 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 39 | lttng_snapshot_record $SESSION_NAME |
| 40 | stop_lttng_tracing_ok $SESSION_NAME |
| 41 | destroy_lttng_session_ok $SESSION_NAME |
| 42 | |
| 43 | # Validate test |
| 44 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 45 | if [ $? -eq 0 ]; then |
| 46 | # Only delete if successful |
| 47 | rm -rf $TRACE_PATH |
| 48 | else |
| 49 | break |
| 50 | fi |
| 51 | } |
| 52 | |
| 53 | function test_kernel_local_snapshot_after_stop () |
| 54 | { |
| 55 | diag "Test local kernel snapshots after stop" |
| 56 | create_lttng_session_no_output $SESSION_NAME |
| 57 | enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME |
| 58 | lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME |
| 59 | start_lttng_tracing_ok $SESSION_NAME |
| 60 | stop_lttng_tracing_ok $SESSION_NAME |
| 61 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 62 | lttng_snapshot_record $SESSION_NAME |
| 63 | destroy_lttng_session_ok $SESSION_NAME |
| 64 | |
| 65 | # Validate test |
| 66 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 67 | if [ $? -eq 0 ]; then |
| 68 | # Only delete if successful |
| 69 | rm -rf $TRACE_PATH |
| 70 | else |
| 71 | break |
| 72 | fi |
| 73 | } |
| 74 | |
| 75 | function test_kernel_local_snapshot_append_to_metadata () |
| 76 | { |
| 77 | local EVENT1=sched_switch |
| 78 | local EVENT2=sched_process_exit |
| 79 | |
| 80 | diag "Test local kernel snapshots with one event $EVENT1" |
| 81 | create_lttng_session_no_output $SESSION_NAME |
| 82 | enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME |
| 83 | lttng_enable_kernel_event $SESSION_NAME $EVENT1 $CHANNEL_NAME |
| 84 | start_lttng_tracing_ok $SESSION_NAME |
| 85 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 86 | |
| 87 | # first snapshot with only 1 event |
| 88 | lttng_snapshot_record $SESSION_NAME |
| 89 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 90 | if [ $? -eq 0 ]; then |
| 91 | # Only delete if successful |
| 92 | rm -rf $TRACE_PATH |
| 93 | else |
| 94 | break |
| 95 | fi |
| 96 | |
| 97 | diag "Adding event $EVENT2" |
| 98 | # second snapshot with 2 events |
| 99 | lttng_enable_kernel_event $SESSION_NAME $EVENT2 $CHANNEL_NAME |
| 100 | rm -rf $TRACE_PATH/snapshot/* 2>/dev/null |
| 101 | lttng_snapshot_record $SESSION_NAME |
| 102 | validate_trace "${EVENT1},${EVENT2}" $TRACE_PATH/ |
| 103 | if [ $? -eq 0 ]; then |
| 104 | # Only delete if successful |
| 105 | rm -rf $TRACE_PATH |
| 106 | else |
| 107 | break |
| 108 | fi |
| 109 | |
| 110 | stop_lttng_tracing_ok $SESSION_NAME |
| 111 | destroy_lttng_session_ok $SESSION_NAME |
| 112 | } |
| 113 | |
| 114 | function true_loop_cpu0() |
| 115 | { |
| 116 | # Generate many system call events (fill buffers) on CPU 0 |
| 117 | for a in $(seq 1 $1); do |
| 118 | taskset 0x00000001 /bin/true; |
| 119 | done |
| 120 | } |
| 121 | |
| 122 | function test_kernel_local_snapshot_discard () |
| 123 | { |
| 124 | diag "Test local kernel snapshots with small discard buffers" |
| 125 | create_lttng_session_no_output $SESSION_NAME |
| 126 | enable_lttng_mmap_discard_small_kernel_channel $SESSION_NAME \ |
| 127 | $CHANNEL_NAME |
| 128 | lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME |
| 129 | start_lttng_tracing_ok $SESSION_NAME |
| 130 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 131 | |
| 132 | true_loop_cpu0 10000 |
| 133 | |
| 134 | # Take first snapshot, remember first line. |
| 135 | lttng_snapshot_record $SESSION_NAME |
| 136 | FIRST_LINE="$(trace_first_line $TRACE_PATH/)" |
| 137 | diag "First line (1st snapshot): $FIRST_LINE" |
| 138 | |
| 139 | rm -rf $TRACE_PATH |
| 140 | |
| 141 | true_loop_cpu0 10000 |
| 142 | |
| 143 | # Take 2nd snapshot, compare first line. In discard mode, they |
| 144 | # should still be the same. |
| 145 | lttng_snapshot_record $SESSION_NAME |
| 146 | FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)" |
| 147 | diag "First line (2nd snapshot): $FIRST_LINE" |
| 148 | rm -rf $TRACE_PATH |
| 149 | |
| 150 | if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then |
| 151 | fail "First snapshot event do not match." |
| 152 | else |
| 153 | pass "First snapshot event match." |
| 154 | fi |
| 155 | |
| 156 | stop_lttng_tracing_ok $SESSION_NAME |
| 157 | destroy_lttng_session_ok $SESSION_NAME |
| 158 | } |
| 159 | |
| 160 | function test_kernel_local_snapshot_overwrite_small_buffers () |
| 161 | { |
| 162 | diag "Test local kernel snapshot with small overwrite buffers" |
| 163 | create_lttng_session_no_output $SESSION_NAME |
| 164 | enable_lttng_mmap_overwrite_small_kernel_channel $SESSION_NAME \ |
| 165 | $CHANNEL_NAME |
| 166 | lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME |
| 167 | start_lttng_tracing_ok $SESSION_NAME |
| 168 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 169 | |
| 170 | true_loop_cpu0 10000 |
| 171 | |
| 172 | # Take first snapshot, remember first line. |
| 173 | lttng_snapshot_record $SESSION_NAME |
| 174 | FIRST_LINE="$(trace_first_line $TRACE_PATH/)" |
| 175 | diag "First line (1st snapshot): $FIRST_LINE" |
| 176 | |
| 177 | rm -rf $TRACE_PATH |
| 178 | |
| 179 | true_loop_cpu0 10000 |
| 180 | |
| 181 | # Take 2nd snapshot, compare first line. In overwrite mode, they |
| 182 | # WILL be different. |
| 183 | lttng_snapshot_record $SESSION_NAME |
| 184 | FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)" |
| 185 | diag "First line (2nd snapshot): $FIRST_LINE_2" |
| 186 | rm -rf $TRACE_PATH |
| 187 | |
| 188 | if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then |
| 189 | pass "First snapshot event do not match." |
| 190 | else |
| 191 | fail "First snapshot event match." |
| 192 | fi |
| 193 | |
| 194 | stop_lttng_tracing_ok $SESSION_NAME |
| 195 | destroy_lttng_session_ok $SESSION_NAME |
| 196 | } |
| 197 | |
| 198 | function test_kernel_1000_local_snapshots () |
| 199 | { |
| 200 | NB_SNAP=1000 |
| 201 | |
| 202 | diag "Test local kernel snapshots" |
| 203 | create_lttng_session_no_output $SESSION_NAME |
| 204 | enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME |
| 205 | lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME |
| 206 | start_lttng_tracing_ok $SESSION_NAME |
| 207 | lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH |
| 208 | for i in $(seq 1 $NB_SNAP); do |
| 209 | diag "Snapshot $i/$NB_SNAP" |
| 210 | rm -rf $TRACE_PATH/snapshot/* 2>/dev/null |
| 211 | lttng_snapshot_record $SESSION_NAME |
| 212 | # Validate test |
| 213 | validate_trace $EVENT_NAME $TRACE_PATH/ |
| 214 | if [ $? -eq 0 ]; then |
| 215 | # Only delete if successful |
| 216 | rm -rf $TRACE_PATH |
| 217 | else |
| 218 | break |
| 219 | fi |
| 220 | done |
| 221 | stop_lttng_tracing_ok $SESSION_NAME |
| 222 | destroy_lttng_session_ok $SESSION_NAME |
| 223 | } |
| 224 | |
| 225 | plan_tests $NUM_TESTS |
| 226 | |
| 227 | print_test_banner "$TEST_DESC" |
| 228 | |
| 229 | if [ "$(id -u)" == "0" ]; then |
| 230 | isroot=1 |
| 231 | else |
| 232 | isroot=0 |
| 233 | fi |
| 234 | |
| 235 | skip $isroot "Root access is needed. Skipping all kernel snapshot tests." $NUM_TESTS || |
| 236 | { |
| 237 | |
| 238 | validate_lttng_modules_present |
| 239 | |
| 240 | start_lttng_sessiond |
| 241 | |
| 242 | #tests=( test_kernel_1000_local_snapshots ) |
| 243 | tests=( test_kernel_local_snapshot |
| 244 | test_kernel_local_snapshot_after_stop |
| 245 | test_kernel_local_snapshot_append_to_metadata |
| 246 | test_kernel_local_snapshot_discard |
| 247 | test_kernel_local_snapshot_overwrite_small_buffers |
| 248 | test_kernel_1000_local_snapshots |
| 249 | ) |
| 250 | |
| 251 | for fct_test in ${tests[@]}; |
| 252 | do |
| 253 | SESSION_NAME=$(randstring 16 0) |
| 254 | ${fct_test} |
| 255 | |
| 256 | done |
| 257 | |
| 258 | stop_lttng_sessiond |
| 259 | } |