tools/testing/selftests/ftrace/test.d/event/event-pid.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event tracing - restricts events based on pid
   4 # flags: instance
   5
   6 do_reset() {
   7     echo > set_event
   8     echo > set_event_pid
   9     echo 0 > options/event-fork
  10     clear_trace
  11 }
  12
  13 fail() { #msg
  14     do_reset
  15     echo $1
  16     exit $FAIL
  17 }
  18
  19 yield() {
  20     ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1
  21 }
  22
  23 if [ ! -f set_event -o ! -d events/sched ]; then
  24     echo "event tracing is not supported"
  25     exit_unsupported
  26 fi
  27
  28 if [ ! -f set_event_pid ]; then
  29     echo "event pid filtering is not supported"
  30     exit_unsupported
  31 fi
  32
  33 reset_tracer
  34 do_reset
  35
  36 echo 1 > events/sched/sched_switch/enable
  37
  38 yield
  39
  40 count=`cat trace | grep sched_switch | wc -l`
  41 if [ $count -eq 0 ]; then
  42     fail "sched_switch events are not recorded"
  43 fi
  44
  45 do_reset
  46
  47 read mypid rest < /proc/self/stat
  48
  49 echo $mypid > set_event_pid
  50 echo 'sched:sched_switch' > set_event
  51
  52 yield
  53
  54 count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`
  55 if [ $count -ne 0 ]; then
  56     fail "sched_switch events from other task are recorded"
  57 fi
  58
  59 do_reset
  60
  61 echo $mypid > set_event_pid
  62 echo 1 > options/event-fork
  63 echo 1 > events/sched/sched_switch/enable
  64
  65 yield
  66
  67 count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`
  68 if [ $count -eq 0 ]; then
  69     fail "sched_switch events from other task are not recorded"
  70 fi
  71
  72 do_reset
  73
  74 exit 0