tools/testing/selftests/ftrace/test.d/event/toplevel-enable.tc

   1 #!/bin/sh
   2 # description: event tracing - enable/disable with top level files
   3
   4 do_reset() {
   5     echo > set_event
   6     clear_trace
   7 }
   8
   9 fail() { #msg
  10     do_reset
  11     echo $1
  12     exit $FAIL
  13 }
  14
  15 yield() {
  16     ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1
  17 }
  18
  19 if [ ! -f available_events -o ! -f set_event -o ! -d events ]; then
  20     echo "event tracing is not supported"
  21     exit_unsupported
  22 fi
  23
  24 reset_tracer
  25 do_reset
  26
  27 echo '*:*' > set_event
  28
  29 yield
  30
  31 echo 0 > tracing_on
  32
  33 count=`head -n 128 trace | grep -v ^# | wc -l`
  34 if [ $count -eq 0 ]; then
  35     fail "none of events are recorded"
  36 fi
  37
  38 do_reset
  39
  40 echo 1 > events/enable
  41 echo 1 > tracing_on
  42
  43 yield
  44
  45 echo 0 > tracing_on
  46 count=`head -n 128 trace | grep -v ^# | wc -l`
  47 if [ $count -eq 0 ]; then
  48     fail "none of events are recorded"
  49 fi
  50
  51 do_reset
  52
  53 echo 0 > events/enable
  54
  55 yield
  56
  57 count=`cat trace | grep -v ^# | wc -l`
  58 if [ $count -ne 0 ]; then
  59     fail "any of events should not be recorded"
  60 fi
  61
  62 do_reset
  63
  64 exit 0