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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: Kprobe dynamic event with function tracer
   4 # requires: kprobe_events stack_trace_filter function:tracer
   5
   6 # prepare
   7 echo nop > current_tracer
   8 echo $FUNCTION_FORK > set_ftrace_filter
   9 echo "p:testprobe $FUNCTION_FORK" > kprobe_events
  10
  11 # kprobe on / ftrace off
  12 echo 1 > events/kprobes/testprobe/enable
  13 echo > trace
  14 ( echo "forked")
  15 grep testprobe trace
  16 ! grep "$FUNCTION_FORK <-" trace
  17
  18 # kprobe on / ftrace on
  19 echo function > current_tracer
  20 echo > trace
  21 ( echo "forked")
  22 grep testprobe trace
  23 grep "$FUNCTION_FORK <-" trace
  24
  25 # kprobe off / ftrace on
  26 echo 0 > events/kprobes/testprobe/enable
  27 echo > trace
  28 ( echo "forked")
  29 ! grep testprobe trace
  30 grep "$FUNCTION_FORK <-" trace
  31
  32 # kprobe on / ftrace on
  33 echo 1 > events/kprobes/testprobe/enable
  34 echo function > current_tracer
  35 echo > trace
  36 ( echo "forked")
  37 grep testprobe trace
  38 grep "$FUNCTION_FORK <-" trace
  39
  40 # kprobe on / ftrace off
  41 echo nop > current_tracer
  42 echo > trace
  43 ( echo "forked")
  44 grep testprobe trace
  45 ! grep "$FUNCTION_FORK <-" trace