tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: Kprobe dynamic event - probing module
   4 # requires: kprobe_events
   5
   6 rmmod trace-printk ||:
   7 if ! modprobe trace-printk ; then
   8   echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=
   9 m"
  10   exit_unresolved;
  11 fi
  12
  13 MOD=trace_printk
  14 FUNC=trace_printk_irq_work
  15
  16 :;: "Add an event on a module function without specifying event name" ;:
  17
  18 echo "p $MOD:$FUNC" > kprobe_events
  19 PROBE_NAME=`echo $MOD:$FUNC | tr ".:" "_"`
  20 test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure
  21
  22 :;: "Add an event on a module function with new event name" ;:
  23
  24 echo "p:event1 $MOD:$FUNC" > kprobe_events
  25 test -d events/kprobes/event1 || exit_failure
  26
  27 :;: "Add an event on a module function with new event and group name" ;:
  28
  29 echo "p:kprobes1/event1 $MOD:$FUNC" > kprobe_events
  30 test -d events/kprobes1/event1 || exit_failure
  31
  32 :;: "Remove target module, but event still be there" ;:
  33 if ! rmmod trace-printk ; then
  34   echo "Failed to unload module - please enable CONFIG_MODULE_UNLOAD"
  35   exit_unresolved;
  36 fi
  37 test -d events/kprobes1/event1
  38
  39 :;: "Check posibility to defining events on unloaded module";:
  40 echo "p:event2 $MOD:$FUNC" >> kprobe_events
  41
  42 :;: "Target is gone, but we can prepare for next time";:
  43 echo 1 > events/kprobes1/event1/enable
  44
  45 :;: "Load module again, which means the event1 should be recorded";:
  46 modprobe trace-printk
  47 grep "event1:" trace
  48
  49 :;: "Remove the module again and check the event is not locked"
  50 rmmod trace-printk
  51 echo 0 > events/kprobes1/event1/enable
  52 echo "-:kprobes1/event1" >> kprobe_events