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 # requires: set_event set_event_pid events/sched
   5 # flags: instance
   6
   7 do_reset() {
   8     echo > set_event
   9     echo > set_event_pid
  10     echo 0 > options/event-fork
  11     clear_trace
  12 }
  13
  14 fail() { #msg
  15     do_reset
  16     echo $1
  17     exit_fail
  18 }
  19
  20 echo 0 > options/event-fork
  21
  22 echo 1 > events/sched/sched_switch/enable
  23
  24 yield
  25
  26 count=`cat trace | grep sched_switch | wc -l`
  27 if [ $count -eq 0 ]; then
  28     fail "sched_switch events are not recorded"
  29 fi
  30
  31 do_reset
  32
  33 read mypid rest < /proc/self/stat
  34
  35 echo $mypid > set_event_pid
  36 grep -q $mypid set_event_pid
  37 echo 'sched:sched_switch' > set_event
  38
  39 yield
  40
  41 count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`
  42 if [ $count -ne 0 ]; then
  43     fail "sched_switch events from other task are recorded"
  44 fi
  45
  46 do_reset
  47
  48 echo $mypid > set_event_pid
  49 echo 1 > options/event-fork
  50 echo 1 > events/sched/sched_switch/enable
  51
  52 yield
  53
  54 count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`
  55 if [ $count -eq 0 ]; then
  56     fail "sched_switch events from other task are not recorded"
  57 fi
  58
  59 do_reset
  60
  61 exit 0