tools/testing/selftests/ftrace/test.d/trigger/trigger-snapshot.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event trigger - test snapshot-trigger
   4
   5 do_reset() {
   6     reset_trigger
   7     echo > set_event
   8     clear_trace
   9 }
  10
  11 fail() { #msg
  12     do_reset
  13     echo $1
  14     exit $FAIL
  15 }
  16
  17 if [ ! -f set_event -o ! -d events/sched ]; then
  18     echo "event tracing is not supported"
  19     exit_unsupported
  20 fi
  21
  22 if [ ! -f events/sched/sched_process_fork/trigger ]; then
  23     echo "event trigger is not supported"
  24     exit_unsupported
  25 fi
  26
  27 if [ ! -f snapshot ]; then
  28     echo "snapshot is not supported"
  29     exit_unsupported
  30 fi
  31
  32 reset_tracer
  33 do_reset
  34
  35 FEATURE=`grep snapshot events/sched/sched_process_fork/trigger`
  36 if [ -z "$FEATURE" ]; then
  37     echo "snapshot trigger is not supported"
  38     exit_unsupported
  39 fi
  40
  41 echo "Test snapshot tigger"
  42 echo 0 > snapshot
  43 echo 1 > events/sched/sched_process_fork/enable
  44 ( echo "forked")
  45 echo 'snapshot:1' > events/sched/sched_process_fork/trigger
  46 ( echo "forked")
  47 grep sched_process_fork snapshot > /dev/null || \
  48     fail "snapshot trigger on sched_process_fork did not work"
  49
  50 reset_trigger
  51 echo 0 > snapshot
  52 echo 0 > events/sched/sched_process_fork/enable
  53
  54 echo "Test snapshot semantic errors"
  55
  56 ! echo "snapshot+1" > events/sched/sched_process_fork/trigger
  57 echo "snapshot" > events/sched/sched_process_fork/trigger
  58 ! echo "snapshot" > events/sched/sched_process_fork/trigger
  59
  60 do_reset
  61
  62 exit 0